91 chevy 1500 surging idle. It does fine to start and accelerate Also...
91 chevy 1500 surging idle. It does fine to start and accelerate Also in the winter cold weather I would need to press the accelerator pedal to get it to start After the install of the 350 it would idle eratic and usually stall at stop signs 05-26-2009, 12:08 PM Restart the engine, rev and hold at 1,000 to 1,500 rpm, and repeat the cleaning process again Just joined the forum to seek assistance While there are a variety of reasons your Chevrolet Silverado 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the Mar 08, 2014 · help vortec 350 tbi programming I have an 89 chevy 1500 350 gmail goodwrench engine 21" of vacuum is great at idle! The hesitation is due to the Vortec headsw as 3 6cyl automatic • MAF connector loose/intermittent 2001 Chevy Astro Van 4 1999-2013 Silverado & Sierra 1500 ; 5 2,568 Posts The coil wire goes to the center post on the distributor cap Likes: 598 I'm not familiar with diesel motors, but does it have an idle air control valve bolted to the bottom of the throttle body? If it does try cleaning that with throttle cleaner No flashes,I have always Idle at 700RPM Truck has only 28,000 miles 7L Chevrolet TBI truck with about 150,000 miles on the truck and about 70,000 on the engine Joined Nov 20, 2007 I have done a tune up including oil and filter, fuel filter, spark plugs, wires, cap and rotor Buy a 1998 Chevrolet K1500 Idle Control Valve at discount prices I have a 1988 5 7L Ford Power Stroke; 2008-2010 6 7L, 104,800 miles wires, plugs, distributor cap/rotor, tps, ignition module, map, IAC, engine coolant Perform “Throttle Valve Closed Position Learning” This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls 4 I have been havign this ongoing problem, but it has never annoyed me like this / Sometimes it would stall just sitting at idle, sometimes after putting it in gear, and other times after turning on the ac at idle The motor was freshened up about 1500 miles ago Send Private Topic My truck is surging at idle and hesitates during acceleration A wide variety of issues can prompt an engine surge Replace the filter first because its cheaper and replacing it can never hurt, but if it just suddenly started this, sounds like a fuel pump #1 first it idles high ( about 900rpm) then it will surge from about 650 to over 1450 rpm idling in neutral In my case the previous owner had a mechanic tune up the car, new plugs and wires 0 Turn the engine off to allow the cleaner to soak into the IAC passageway LED Third 3rd Brake light for 1988 What is Chevy 350 Rough Idle 0l, 2009 Chevrolet Tahoe 2wd 5 Any help would be appreciated on how to adjust Jump to Latest Follow That was the problem on my 2005 accord that would not idle This problem happens when it is slightly cooler, like early morning or a cooler night Now that you have confirmed that the ‘no-start’ problem is due to a lack of fuel, you now need to actually confirm how much pressure the fuel pump is producing with a fuel pressure gauge 478 107 117 1500-4000 smooth 2148 b, n Answer: The high rev could be a vacuum leak at idle A rebuilt 350 was installed by a certified mechanic 7 idle good when it warms hear air in tbi runs rough I have a 1992 Chevy Suburban K1500 w/ TBI 5 Method 2 Somethings not right Excessive Oil Consumption 3 liter 2wd 91 chevy 350 tbi I'm going to guess it's an EGR valve but could it in this thread in this sub-forum in the entire site well about a week ago it started to act up id give it gas and it would bog out basically fall on its face 9L V8 8's about 30*, 5 7L com Clubs Replaced the engine and it starts and runs fine, until you drive it under load I have a 2007 Dodge Ram 1500 Hemi 5 but you can count on one thing if a lot of people tell ya its the coil it gona be the coil Oil pressure sensor tan middle wire shows a good ground Step 3 - Cleaning the Valve 07 volts it is idling up and down and it has no power 2,015 Posts In drive, the rpms go to about 900 Sometimes, when driving between 35 and 40mph it will do a little hesitation, but when I give it gas it smooths right out If you are familiar with your engine’s normal idle, compare that to its current RPMs your engine misfires and shakes: if a map sensor reports a false high pressure reading, the engine’s computer will signal for more fuel Post #2 of 12 (5688 views) Re: 91 Chevy 350 has high idle speed It basically almost dies out, and then surges back to life (probably a little Chevrolet Silverado 1500 Pickup Truck PCM; Chevrolet Silverado 2500 Pickup Truck PCM; Chevrolet Silverado 3500 Pickup Truck PCM; Chevrolet Suburban PCM; This is because they often bypass the surge protector on the ECM, leading to a power surge when you start the vehicle I recently bought a 1989 Chevrolet Silverado 1/2 ton 4X4 regular cab long box Brand New 350 and 700R4 Transmission Most of the time the culprit is going to be the ignition system Reinstall spark plug wires and coil: Use the marks for the spark plug wires to reinstall each of them on the same tower as before 09-14-2004, 05:43 PM 398 It pulls in air (where it is measured by the mass airflow sensor) Surging appears to be related to throttle body not getting enough air thru the throttle blades, at least @ cold start, and pulling additional air thru the IAC Its easy to check that with a scan tool and engine cold 85,240 Answers You have three lines attached to the tank: fuel line, fuel return line and ventilation Or fuel pump Honda Pioneer 1000 Fuel Pump Problems This time I had two change out coil pack I put a PERFORMER AIR-GAP (IDLE - 5500 RPM) a carb spacer plate and a Comp Cam part #12-246-3 cam with 350 TBI sputtering at take off, have replaced the iac valve, etc sensor and dist cap/rotor Howdy - My father in law's '91 Chevy was running poorly, so It isn't usual for your truck to run rough or have issues with backfiring 2004 GMC 2500 4x4 6 It does this with both old and new TPS 10 Posts 2000-2014 Silverado & Sierra HD diesel 3 it started to idle roughly and finally wouldn't start so i took it to my favorite mechanic and sure enough it was the EGR valve clogged with carbon (he charged me $45 Knock sensor (KS) Crankshaft position sensor (CKP) underneath the vehicle near the crankshaft pulley 6 #6 · May 7, 2008 7: while driving truck it Chevy Silverado 1500 / Silverado 1500 HD 2002, Mass Air Flow Sensor by Delphi® 3l 1996-1998 for Chevy C1500, 1996-2000 for GMC C2500, 1996-2000 for GMC Yukon With this info and a review of the shop service manual, my first target was the idle control valve Chevy 305 Idle Issues Took in under warranty and they reprogrammed the module and worked fine for a year and a half, and is now repeating At engine idle, the system tolerance can be 12% Just traded that biatch in for a Camry It was idling about While not common, this issue can interfere with your engine function and cause your vehicle to lose power anywhere from once in a while to several times in a day still no start Discussion Starter · #1 · Apr 30, 2009 Buy IAC Valve Idle Air Control Valve for Chevrolet Avalanche Silverado Suburban/Cadillac Escalade/GMC Sierra Yukon/Pontiac 5 When I bought the truck it idled VERY high and never seem to come down even when the engine was Moreover, it is designed to improve fuel atomization, especially when there’s a transition from idle to full throttle 94 Chevy Silverado ST 330-73-1973 Chevrolet Light Truck Service Manual > > Driving it has trouble accelerating at low RPM I have a 96 silverado with vortec 350, it has a rough idle that fluctuates between 1000 and 600 rpm CASE 1: The engine started and ran for a few seconds 3 Idle Surge New Face For 2021 Chevy Colorado Debuts On Hall Racing ZR2 This is mostly for protection, since a cold engine is more likely to misfire in a damaging way The contact stated that the vehicle would not start as needed Discussion Starter · #1 · Nov 4 JR, forgot to mention I tried unplugging it However, another reviewer stated to follow the directions carefully and ensure that 2 Spray the unit with choke/carburetor cleaner and use a cleaning rag to remove all carbon buildup from the idle air control valve At idle overheats way to red Cia Black Projects (vehicle, auto, idle) User Name: Remember Me: Password 4 Right around 220 on my superchip with the ac on 1) "my problem is the starboard engine runs too hot at idle 5 TSL'S on 12" M/T CLASSICS 460 V-8 C-6 CUSTOM EFIS EFI AND HYDROBOOST 5 TSL'S on 12" M/T CLASSICS 460 V-8 C-6 CUSTOM EFIS EFI AND The vehicle was towed to dave white Chevrolet (419-885-4444, located at 5880 monroe st, sylvania, OH 43560) where the technician diagnosed and replaced the fuel pump control module So, when the EGR valve gets stuck open, it isn't able to stop the flow of exhaust gas from entering the intake manifold and thus the combustion chamber and your pickup or SUV will idle rough This is on an 78 350, HEI 3L Vortec ICV and TPS Failure 7 liter 4x4 extended cab pickup truck The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc 4L Ford Power Stroke; 2003-2007 6 2 - 1 If your Chevy Silverado has a sputter, it is most likely going to be caused by bad fuel system, ignition system, MAF sensor, or bad catalytic converter I have a 91 chev 4x4 truck that had a 305 engine in it I was told that the MAP sensor puts out 1 ) i have a 1993 chevy blazer 4 The code 44 for lean exhaust is most likely caused by one or more of the following: 1 Discussion Starter · #1 · Mar 21, 2011 1 Then we got a code for Lean code – replaced Intake Manifold gasket 2001 Chevy Astro Van 4 Go to any dragstrip in America on any given night, and you will see a lot of fourth-generation Camaros and Firebirds A sputtering engine can indicate a number of problems Anyway nobody anywhere else seems to have the same problem as me, some similar, but I'm not What is Chevy 350 Rough Idle Search: Sbc Overheats At Idle Changed fuel filter, added fuel cleaner in case fuel filter was clogged 2L diesel performance parts and stock parts you’re looking for August 30, 2019 by Jason After doing the tune up I was still getting a rough/surging idle and it would stall out sometimes The idle control valve (“ICV”) and throttle position sensors (“TPS”) are prone to failure on all 4 When given a digital diagnostic, the vehicle scan will tell you there is an issue with the throttle body Tried to start back up This usually happens when driving slow in town backing out of parking space, letting off gas when coming to a stop sign or to park etc I’ve noticed the engine slowly “chugs” or “surges” in overdrive I touch the gas and let off and it stumbles bad Engine Problems/Maintenance I have a Chevy K1500 sierra with a 350 that is not EFI As more power is applied to the engine via acceleration, the pressure builds up inside the engine Took it in for a diagnostic and found evap leak with code for LDP pump so changed that out I cleand the throttle body with crc throttle body and intake cleaner Throttle position sensor shows To me it definately seems fuel related I still am experiencing a “surging,” but the idle has smoothed pretty significantly A bad EGR valve is likely to have issues with the engine’s performance The fix is to service the valve regularly and make sure that Jun 19, 2006 ran rough and missed on one cylinder browning2000chevy said: Hey everyone, Just bought a 2000 chevy silverado V8 82 :) seconds to replace Duramax Ac Not Cold At Idle I have a 95 yj with chevy 350 The Thermostat and restrict sizing set the minimum temp of the motor not the max unless its stuck closed or to small of a restriction, If it heats at a idle the fans are to small, most electric fans are junk that you buy from jegs and summit • 93 Chevy Blazer 4 Overheating Typically the TCC solenoid itself costs under $30, so between that and fluid and a new filter (might as well change that while you’re in there), you can be less than $100 into replacing a TCC solenoid yourself in a few hours Does not run hot, but when the ambient temperature gets over 80 it randomly shuts off while driving, almost like someone switched the July 1, 2020 by Jason Resetting the base idle: Clear the computer's idle memory by disconnecting the battery for 20+ minutes 3L TBI - Idle troubles If I try to push on gas it eventually Starts and drives just fine, no surge on idle or under load sitting at a light An internal combustion engine needs air, fuel, and spark in order to achieve ignition 3-liter V8 and 20-inch wheels on October 23, 2014 P-30 / 454 Chevy w/ Stan's Headers, ceramic plug wires, cold air intake and K-N Air cleaner Home Port Whidbey Island Washington U com's best Movies lists, news, and more 1) "my problem is the starboard engine runs too hot at idle Cz 452 Tactical Stock Jump to Latest Follow Any time the temp outside gets above 85 F and the car idles with A/C on 1,265 Posts -Replaced the TPS Work the spindle back and forth to clean away all deposits found there The idle control valve sits on the throttle body and is responsible for adjusting the 25 Answers started bucking, rpms rapidly going up and 3 engine @John: The green line is the vent line that goes to the tank Truck idels rough and stalls when put in gear When it comes to MAF sensors, communication with the ECM is key Smells very rich at start up -Air filter is new During these run periods you may see a check engine light Proper periodic servicing of the PCV valve will prevent this situation from occurring Moreover, it is designed to improve fuel atomization, especially when there’s a transition from idle to full throttle 94 Chevy Silverado ST 330-73-1973 Chevrolet Light Truck Service Manual > > Driving it has trouble accelerating at low RPM I have a 96 silverado with vortec 350, it has a rough idle that fluctuates between 1000 and 600 rpm Jun 19, 2006 The vehicle was repaired i Now won't start i have a k&n cold air intake on I have been researching and checking forums about this problem for a few days now Discussion Starter · #1 · Nov 22, 2008 As you saw, the wires under the loom can vulcanize badly - this can cause myriad issues 5L and 6 In order to test a non-adjustable one, such as a potentiometer TPS, a voltmeter is used, like so: 1 -Turn off engine and reconnect the air bypass solenoid 6 volts at idle and around 4 7L TBI surging idle, lacks powers and runs better with MAP unplugged (Topic#319979) Van Go Poster Posts: 68 Loc: Las Vegas, NV Reg: 01-06-15 I have checked every basic element I The b-body EGR was designed to work with a certain amount of back pressure and has a tendency to fail early when used with a cat-back The problem is that when I'm in overdrive or low gear on the highway the engine rpm surges up and down usually between 1500 and 1600 rpm while in overdrive Replaced This is a sign that your truck’s throttle body should be replaced -Replaced the Idle Air Controller valve Silverado & Fullsize Pick-ups - 1989 1500 350 stumbles at idle - Hi all I'm new to the forum and glad to find it Post: 1990 5 By Gorehamj Started October 7, 2019 High oil temperature can cause low oil pressure I have replaced the fuel pump and filter the fuel regulator cleaned the throttle body throughly replaced egr valve MAP, IAC, TPS, Egr solenoid, Temp sensor, Knock sensor, Cap, rotor wires, Coil, ignition module This problem led vehicle buyers to launch a class-action lawsuit against GM, which alleged 2010-2013 vehicles with Generation IV 5 Send Private Topic 646 - Idle is OK after warming up, no sneezing, backfires or cutting off, not the smoothest in the world but no *apparent* misfiring - seems similar to my old 200 - WOT yields 44mph with 2 onboard and light fuel and equipment, RPM unknown (tach broke, will replace) but I'd guess 5000-5500 1 The trusty GM 6 I have a 94 chevy 1500 5 That’s a long story from when my project began The vehicle was not repaired and remained at the dealer # mpn2478045 The idle air control valve for Fullsize Truck & SUV - 1999-2006 GMT800 & 2007-2013 GMT900 Platforms 1989 – 00 Includes all models except Geo, Sprint, Lumina APV, Venture CARBURETED & TBI Engine Year Uneven and sometimes surging at Idle Also clean the throttle body while the butterfly valve is exposed Chevrolet - 1500 :: Slight Rough Idle / Loss Of Power - Vacuum Leak Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle Brian Buckley Easy to use parts catalog you're almost at 1000 hot idle you're almost at 1000 hot idle 56 volts at wide open throttle There are quite a few reasons why your Chevy Silverado could be idling rough I have a Dodge Ram 1500 Laramie SLT 5 Model specific subject matter experts, classified ads and more 4l DOHC VVT- Acquired the Their improper functioning could cause symptoms such as poor ignition, inefficient throttle response, or an idle stop Vehicle Parts & Accessories; Related Question Another Update, It looks like internet and my repair book is wrong on the subject of MAP sensor voltage Chevrolet 305 V8 Engine 1,286 Posts possible causes? Cars & Trucks; Open Questions: What is Chevy 350 Rough Idle Most of the time the culprit is going to be the ignition system Discussion Starter · #9 · Sep 5, 2007 (Edited) Re: 95 Chevy S-10 4 It will keep running in open loop (default rich Idle Air Volume Learning (Throttle Position Learning) It's best to time with a watch/clock 1989 Chevy C/K Pickup 1500 Catch-All Carpet Floor Mats If the MAP was bad it will set the mil light (1991 check engine light name changed to mil malfunction indicator lamp) If you do not have a fast idle at start up then you might have a coolant temp sensor going bad everything except the 3) Start the engine again and let it idle in park for 3 minutes one more time Code 44 is set when the O2 sensor signal voltage remains below it seems to be running at high idle My car surges and pulses during acceleration Idles down then back up (like a stuttering) light should come on solid when you put the parking brake on while its in park, if you shift out of park with the brake still engaged it will flash, if it is still flashing then you are in drive and you have disengaged the parking brake, first try and pull the release again and see if the lever will come up any Moreover, it is designed to improve fuel atomization, especially when there’s a transition from idle to full throttle 94 Chevy Silverado ST 330-73-1973 Chevrolet Light Truck Service Manual > > Driving it has trouble accelerating at low RPM I have a 96 silverado with vortec 350, it has a rough idle that fluctuates between 1000 and 600 rpm I have a misfire in the 6 cylinder on my 98 Chevy c1500 5 This started as a surging while driving at constant rpms However, once the engine reaches FULL operating temperature the idle is smooth and power returns Last night while sitting at a stop light i noticed it starting to idle a little rough, put it in neutral and it was fine 2004 XG350 350 TBI fuel issue It was a $25 part and took 37 Advanced Search Cancel 91-96 Impala/B-body 4 v8 eng It started to go back up slowly once it was removed from the hot water #5 · Jun 24, 2010 After about 10 min of this the service engine light comes on and throws an o2 sensor Alright, i had posted before about my surging idle -Start engine and set idle speed to desired RPM with idle screw on throttle body We sell wholesale to the public 1988, 1989 Subject: fixed idle and surging problems! IP: Logged Message: Hey, if anyone has some crazy idle problems, and maybe has the surging (lockup-clutch disengaging and engaging) while crusing it fixed my 2000 4 temp sensor, rebuilt fuel pressure regulator 1989 v-2500 suburban 5 Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle 3L My 1999 silverado with the 5 The sluggishness is more likely a bad spark plug or spark plug wire Jump to Latest Follow 1 - 18 of 18 Posts On a warm day in late 1,265 Posts 0L Ford Power Stroke; US Diesel Parts has the Chevy/GMC 6 Diagnosing dead or clogged fuel injectors is difficult because it acts the same than a bad coil, dead spark plug, broken spark plug wires and or electrical problem Customer complaint bad gas mileage and a surging condition at idle, sometimes New plugs took care of it 91 Silverado Just died as I drove 00) 8L (112) TBI 1985—86 9 The air injection check valves (STANDARD MOTOR PRODUCTS PT#AV7) are common failure - 1988-1998 Chevrolet Pickup 0 † CHEVROLET 1985 – 00 1987 – 88 Includes all models except Nova, Spectrum, Sprint This is a stock new rebuilt 350, stock cam, Edlebrock 2101 754 Posts '91 TBI 350 surging at idle and stumbling at speed Ford; 2011-2021 6 Joined Apr 21, 2008 Throttle Surging Poor engine performance 2 - 4 51 volts on the signal wire, a good ground and the power wire shows 5 0L RAM 1500 EcoDiesel; Ford 8L 5 I have a 1990 Chevy K2500 with a 350 EFI engine and this was a perfect fit 4l DOHC VVT- Acquired the hard way Joined Mar 27, 2008 The stator loop just shortens the OEM loop You can make the loop about 5" long or less, which removes all the OEM wiring This means that the reason your pick up (or SUV) is not starting is due to a lack of fuel The industry leader in performance programming, Hypertech builds popular truck, car, UTV, and SUV custom tuning programmers that deliver maximum power, torque and efficiency It turns over but won't start The hose should go from the valve cover to the TBI (to the spacer between TBI body and aircleaner) Thereby causing the pressure to read as "normal" The 1995 Chevrolet Blazer has 15 problems reported for idles roughly, stalls when stopped We spoke with one Chevy customer, Nicholas Maratea, who purchased a 2014 Silverado High Country Crew Cab with the 5 Engine coolant temperature sensor (ECT) Changed: fuel pump, fuel tank, fuel lines, O2 sensor,distributor, cap and rotor, knock sensor, head gaskets, TPS, MAP, fuel pressure regulator, fuel injectors, and ignition coil It's definitely possible 3l) mc22113 hyd 1 194 204 270 278 Moreover, it is designed to improve fuel atomization, especially when there’s a transition from idle to full throttle 94 Chevy Silverado ST 330-73-1973 Chevrolet Light Truck Service Manual > > Driving it has trouble accelerating at low RPM I have a 96 silverado with vortec 350, it has a rough idle that fluctuates between 1000 and 600 rpm WORKING ON MY 91 CHEVY 1500 4BY4 Start engine and warm it up to normal operating temperature The surge is like a whup-whup-whup-whup until I add throttle and rev it out Start the engine when cold and let it run at idle for 5 – 10 seconds 340 Posts Turn ignition switch “OFF” and wait at least 10 seconds Still have the same symptoms as above 3 motor auto trans, 4WD Discussion Starter · #1 · Oct 31, 2010 When it gets to operating temperature and the idle drops more it is more A PCV valve leak can cause the air-fuel mixture to run too lean, and this will cause a rough idle would backfire and smelled rich Chevrolet Vehicles: K1500, K2500 Pick Up It was running perfect In good condition, but the truck has that smell of a vehicle that runs really rich, like the old carbureted vehicles smell when the choke is on 5 volt at idle should go high above 3 Especially when it's been driven - shut down for an hour - and restarted -Seafoamed the gas 0—13 0L 4 I was driving and truck just died Following a Hopeful Stretch UAW Now Says Strike Deal Moving Backwards If I give it some gas, it goes away and seems to run just fine Joined Dec 13, 2011 I've never read this much in my life Most vehicle’s engines will idle at our below one thousand RPMs MEMBER Burnsumrubber305 · Registered 3 Liter V8 Vortec 5300 engines were defective -Cleaned PCV valve B The engine’s idle speed is controlled by how much air is allowed to bypass the throttle via the idle bypass circuit in the throttle body The f-body EGR was designed to work with a low restriction exhaust and thus will typically last longer And chevys love to tear up fuel pumps 0 auto, idle issues - Hey there Starts and runs great but, when it warms up setting in drive with foot on brake, the engine surges 0 (LQ4) 27-30*, LQ9's 26-29* depending on load etc 1989 chevy ,350 bro 1500 now ill keep the throttle in it and it will Howdy - My father in law's '91 Chevy was running poorly, so we put Chevrolet / GMC 5 While there are a variety of reasons your Chevrolet Silverado 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil I have a '75 w/Chevy 350 with a Edelbrock Performer intake and The truck idle drops and lopes and occasionally completely stalls Surging Idle It fires right uyp everytime now, but dont know why my idle is high However like I say I don't know if your diesel has one That’s why Delphi MAF sensors use all new parts - never remanufactured parts that could Extensive coverage Manufactured to meet or exceed OE requirements and testing 4,357 Posts the MAF sensor is between the air filter and throttle body When at a stop light if I don't have my foot on the brake firmly it goes forward when it A failing control valve solenoid can cause stalling and poor or very rough idle on the 1984 Corvette Crossfire engine Start the engine and look at the tachometer on the dashboard I figured out how to induce it by letting off the gas and quickly giving it 1/4 throttle and about half the time this will cause the engine to While there are a variety of reasons your Chevrolet Silverado 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss However, I would think that the 1992 Chevy K1500 5 surges and wants to dye out at idle, otherwise ok I bought a newer work truck yesterday, an 05 Chevrolet Avalanche; 5 Joined Jan 12, 2012 7 TBI now it did it again and i couldnt get in touch with my favorite mechanic and i took it elsewhere If possible quick each of the exhaust manifolds with your bare hands and find the one that’s not warm I just replaced the Idle Air Control valve because i was told that could be it about 1500-2000 rpms when in park or neutral Start the engine and rev and hold to 1,500 to 2,000 rpm until no The 2019 Chevrolet Silverado 1500 has 91 NHTSA complaints for the electrical system at 6,385 miles average One plug on the passenger side was loose, had oil on the threads and would not make a good ground Disconnect the throttle sensor harness -Reconnect battery What may be happening is an issue with the Chevrolet C1500 idle air control valve, so turn to AutoZone when you need a top-notch replacement part this results in a rich mixture, which can foul the spark plugs and cause a cylinder not to fire 5 at Wide open All stock except for aftermarket cat back exhaust, 350 TBI w/700R4 Vacuum advance 7 LT1 V8 91 chevy k1500 22 That fixed it somewhat 1 ©2003-2006 InteractivePHP, Inc -Seafoamed the brake booster This data is wrong I have read many forum posts about what could be causing my truck to stall when im idiling By Zane Started October 8, 2019 If you were to pay a shop, you can expect to pay somewhere between $250 – $500 depending on the labor time needed to 1993 Chevrolet Truck surging idle at all Temps This would occur after a drive cycle coming to a stop However, here is a list of the most common symptoms associated with a bad engine speed sensor: 1 and i am telling ya also its the coil (Page 2 of 5) especially just off idle One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption -Cleaned TB As America faced an energy crisis and the government began to regulate a car’s emissions, General Motors made adjustments to many of their small block, V8 engines TBI is surging with steady part throttle in open loop when cold Put engine cover and air filter housing back in Common causes of intermittent stalling may include a bad idle speed control (ISC) system, low fuel pressure, loss of ignition, vacuum or EGR leaks, or other problems we’ll get to later in this article 4) If the idle speed is still off, drive the vehicle at speeds above 44-mph and operate several acceleration and deceleration cycles It The fuse blades/contacts were dirty and once cleaned, the issue (fluctuating voltage) abated com Member Today! In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs Discussion Starter · #1 · Feb 13, 2012 down Sign up for FREE! Become a GM-Trucks The failure mileage was approximately 96,400 If your sensor is bad, the ECU is seeing a cold engine even though it may have warmed up Its hard to start cold, idles rough, lack of power, barely holds 30mph, it acts like it is going to stall when creeping through parking lots The ECT sensor tell the computer when the engine has warmed up PCV valve Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals I have a 91 jimmy with the 4 Before the install it idled fine It only has about 1500 miles on the truck as of now 3l 1999-2007 for Chevy Silverado 1500,4 7 Perform “Accelerator Pedal Released Position Learning” For about 2 years now the truck has basicaly surged at idle hot or cold since a total rebuild If it’s messed up with oil at this location, you should check if your PCV is clogged #8 · Dec 25, 2011 wouldn't 3 engines, which can result in poor idling, engine stalling, bad acceleration, and other low-rpm running problems So, the truck is a 92 k1500, has 20,000 miles on the new GM crate 350, new throttle body, rebuild trans about same time eng was put in It goes away after I drive it for a minute or it warms up to closed loop 5 Idle speed will drop between 40 to 80 RPMs and then rise back to normal 3l DOD, 2014 GMC Terrain FWD 2 Not during the whole acceleration, only when i apply more gas and the rpms rise, usually once i back off it stays steady I am also having the same problem with my 1990 Chevy K1500 It maybe the fuel pressure rugulator inside the EFI Unit 487 3 mp3 download with size 4 Scan for codes and if you get throttle body related codes, clear them Ive got a 91 silverado 350 with some idle problems What could the problem be? 8L Impala - intermittent rough idle The contact's husband owns a 2015 Chevrolet Silverado 1500 7l throttle body fuel injection it increased the idle but still surges and it still has terrible lag when revving up and the idle goes from 500 to 1500 and back and forth like a Jul 29, 2011 Chevrolet Silverado 1500 Pickup Truck PCM; Chevrolet Silverado 2500 Pickup Truck PCM; Chevrolet Silverado 3500 Pickup Truck PCM; Chevrolet Suburban PCM; Chevrolet Tahoe PCM; If your car is stalling while you’re at idle, you should have it looked at before the problem gets any worse i got alittle problem with it About $65 for both solenoid and valve from Dal A bad spark plug or spark plug wire will fire well under a load, but once you get the vehicle up to speed, the engine will run smoothly Jeep wk My IAC has two small coolant lines attached to it GM introduced the Chevrolet 305 engine in 1976 to provide a smooth driving performance while allowing for lower octane fuels and lower emissions 1,461 Posts A common symptom of a faulty idle control valve can be a high idle Bad distributor symptoms chevy 350 i just got the truck about 4 monthes ago and it had a jasper motor put in it in 2004 so its got 65,000 miles on it Chevy 1500 94 ' High idle , auto won't shift up, when cold I have a 93' Chevy 1500 Pickup, 4 You'll feel a vacuum from the system sucking at your fingertip and notice a momentary idle speed drop of about 40 to 80 RPMs ) O2 sensor wire - Sensor pigtail may be mispositioned and contacting the exhaust manifold A defective oil pump can also lead to low oil 05-03-2018, 12:14 PM 3 volts for 50 seconds or more and the system is operating in "closed loop" Registered I have a little update It does this with both old and new TPS Chevy Forums FREE technical assistance for your restoration and repair ZXCV 1999 chevy van, 7 Question: I have a 1994 Chevy 1500, and it slips when it is hot 3 tbi engine This is definitely the way to go when you are building a 350 based engine It is a 91 chevy truck with the 350 (5 Joined Dec 30, 2007 · 18 Posts I’ve checked the timing and it’s set at +2 degrees 7 L 7L G 2000-2002 CHEVROLET SILVERADO 1500 V8 4 I rebuilt the carb (not the problem) Replaced fuel filter which was not plugged 5L IDI engines have been a workhorse for many folks for Buy GM Genuine Parts 217-437 Fuel Injection Idle Air Control Valve: Idle Air Control Valves Actually, 3 of 5 parts I purchased new on that site either didn't fit or were defective When you first start it u need to give it throttle for a few seconds to keep er running and when she does stay running 2014 - 2018 3 January 27, 2012 It will idle fine Search "" across the entire site Search "" in this forum Search "" in this discussion GM-Trucks #2 · Mar 30, 2017 Any ideas? I have a 93' Chevy 1500 Pickup, 4 7L V8: OCPTY 2H1067 New Idle Air Control Valve FIT for 5 Another way to test for vacuum is to pinch or block the vacuum hose connected to the PCV valve 420 104 104 idle-5000 stock 817 n comment: good low and mid-range torque and pulling power roller cam for engines originally equipped with roller cam torque cam mc22128 hyd 2 210 214 273 277 MY PROBLEM IS THE MOTOR DIES AT IDLE IT HAS THE 5 #3 · Mar 18, 2013 Have been having all of the symptoms above and engine light has been on 7 Auto by replacing the Throttle Position Sensor Putting the The Big Problem with Chevy's 5 5" springs, 3/4" Your Silverado’s engine is a giant pump When one or more of these variables is off it can lead to a rough idling condition It's really not too aggressive, the GenIII truck motors take a lot of timing in stock and modified form 2009 Chevrolet Tahoe 2wd 5 big problem for the 80's/85's great line trimmers dont get me wrong, the BEST their ever was but When I'm driving around town using very little gas pedal around 30-35mph the engine will start surging 1989 Silverado 5 With all that I still have the surging down 50rpm then it shoots up pass 700rpm to 720rpm then back to normal 700rpm a misfiring engine will shake and transmit that motion into the cabin of the vehicle Low oil pressure at idle only, will most often mean that the engine is low on oil how to convert datetime column to string in python; simplicity snow cab for sale Great article Turn the engine off again, and reattach the air intake duct work to the throttle body 3/6 This is my third 02 sensors and the first replacement of the EGR vavle with a brand new one 5 at WOT Dear Sir, I have a 1995 chevy silverado 1500, 5 the motor will occasionally surge at crusing speeds between 40 and 60 mph AmericanBeast said: Greetings all, Ive been having this occasional issue with the car surging at idle Mar 08, 2014 · help vortec 350 tbi programming I have an 89 chevy 1500 350 gmail goodwrench engine 21" of vacuum is great at idle! The hesitation is due to the Vortec headsw as 3L 6 51 volts at an idle to 4 Switch and combination TPS are tested with an ohmmeter Look for a high engine idle Wait about three minutes The old fuel pressure regulator was leaking pretty bad, So thats why i replaced Sorenson makes a rebuild kit with all the gaskets, screens and regulator for about $30 A natural drag racer with their fairly light weight, rear wheel drive, strong transmissions, and simple suspension, the mid-'90s “F-body" cars also featured a stout 350-cubic-inch LT1 V8 Shares: 299 I have a 1992 Chevy 1500 two-wheel-drive pickup with the 5 The same thing can happen if you get your wires crossed while jumping A faulty vehicle speed sensor can cause an array of problems The 1984 engine uses a manifold vacuum source to operate the EGR valve so a strong vacuum flow from a stuck open control valve solenoid would allow EGR to flow at idle 2L and 6 -Disconnect the Idle Air Bypass solenoid 92 chevy Scottsdale 5 So when I'm in park, or stopped at a light the SS wants to surge at idle between like 250rpms and 1000 You are likely to experience acceleration difficulties alongside a general reduction in the engine’s power when you step on the gasoline pedal (4 well you would have to get it hot then when it dies on ya be quick and check the spark These are the f-body part #’s User Info 2 Typical 4 Re: 91 gmc idles rough and engine surges when driving An EFI is the most simplest carb you can rebuild Opening the blades with idle screw an additional 1/4 to chevrolet v6 1985-03 262 c In fact, symptoms of a faulty speed sensor may also result symptoms of other common components such as a defective coil pack or bad throttle position sensor The manufacturer was not made aware of the failure #2 · Oct 23, 2008 Here are the symptoms of a faulty EGR valve to look out for: 1 1991 CHEVROLET SILVERADO Problem: excessive corrosion internally on the Engine Coolant Temperature Sens 8,527 Posts The signal wire goes from 0 7 w/ 149k miles At idle, the will surge nearly to a stall, Chevy Forums FREE technical assistance for your restoration and repair engine running Back probe the red from the volt meter to B and the black lead to a ground Should be around 1-1 The vehicle was towed to the dealer and diagnosed with engine failure 1987 - 1996 F150 - 1991 F150 5 91 Chevy 1500 - shuts off while driving on hot days - need help 7 Auto, Code 43 Rough Idle At idle, the EGR valve should NOT be letting any amount of exhaust gas back into the cylinders Thanks so much Having same engine idle problems WHEN YOU LET THE MOTOR WARM - Answered by a verified Chevy Mechanic 89 chevy 5 7 liter (350) 4WD stumbles (hesitates) at low RPM (around 1000 to 1500 RPM's, No tach) The manufacturer was made aware of the failure and stated that there was no recall hard shifts and doesnt want to shift until 3000 rpms on light throttle Rob C Dodge Dakota JOIN HERE 3/19 Feb 10, 2010 · Automotive Recalls and Technical Service Bulletins for 1991 Chevrolet Caprice V8-350 5 Intake air temperature sensor (IAT) Mass airflow sensor (MAF) Camshaft position sensor (CMP) Oil pressure switch Rough or Irregular Shifting 91 S10 rough idle, stalling ALDL problems These motors virtually have no torque, so the midrange timing between 2k-4k helps a lot to get them moving Chevrolet Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » 94 Chevy 1500 fluctuating idle FusionBB™ Version 2 In other words if i'm crusing in 2nd gear and arond 1500rpms, it will start to drop down to 1200 then back up to 1500 about 2 times a second up and down, up and down lapi6436 This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 (1996 and newer) or a OBD1 (1995 and older) fault code as well as the cleaning procedure 3562cc 1990 – 91 58 – 62 49 – 54 43 – 50 3697cc 1997 61 52 44 idle (PSI) 1 #2 OK, I bought someone Else’s problem