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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 3, 2004
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Limited 3.8L ignition & injector pulses VIN: 1G4HR52L9S
has an intermittant starting problem. cranks but won't start. fuel pressure when no start is 45# but doesn't have fuel injector pulses or coil firing when no start happens. Leave the car when no start occursfor 10 minutes and it will start and run with no prob...
1999 Buick LeSabre Custom 3.8L Upper Intake Manifold VIN: 1G4HP52K8X
Replacing the upper intake manifold with new part and would like to know the GM torque specifications for the upper intake manifold.
2000 Buick LeSabre Custom 3.8L engine VIN: 1G4P54K8Y4
there is a noise in this vehicle when started which sound like an ac compressor locking up grinding type noise but is coming from the left side of the engine compartment, even when serp belt is off vehicle not as loud when warm.
1994 Cadillac DeVille 4.9L service engine soon lamp
simple question-I have a burned out Service Engine Soon lamp an this caddy with a digital cluster-can it be removed and replaced?? cant seem to get ot or any other bulb out of there?? thanks for your help
1984 Chevrolet Caprice 5.0L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on
Hello all, Thanks In advance for any help given!I am working on this old M/C solenoid vehicle and the check engine light flashes very Irregularly (sometimes fast,sometimes slow,almost like a flicker most of the time)at an idle only and sometimes not at all but...
1988 Chevrolet Blazer Silverado 5.7L Poor Idle Quality VIN: 1GNEV18K4J
Can anyone tell me what inputs this vehicle is using to decide when egr should be turned on?? I have egr control intermittantly cold @ idle. hot at idle. If I unplug the solenoid electrical connector the truck runs fine so I dont feel it is a exaust backpressu...
1995 Chevrolet S10 LS 2.2L thermostat ? VIN: 1GCCS1943S
this truck does not overheat even when pulling hills, I made sure the heater core was not plugged since as I remember it also serves as the bypass also. I removed the thermostat and the coolant flows through the radiator unrestricted. The thumping and popping ...
1995 Chevrolet Camaro 3.4L No Start VIN: 2G1FP22S8S
Thanks in advance for any help on this one. Car starts and stalls 2 to 3 times before it'll idle by itself. Customer says normally when cold. We've replaced all sensors (related to start up) and computer twice. When the vehicle acts up, we loose injector pulse...
2001 Chevrolet Monte Carlo SS 3.8L Stall VIN: 2G1WX15K61
engine stalls in the bay @ idle, no codes. fuel pressure while running is 45 psi. engine can be started right back up. the following parts have been replaced, icm,crank sensor,ign.switch,pcm ( eeprom has latest and greatest update), mass air flow sensor,ign. r...
1985 Pontiac Firebird 2.8L Stall, MIL Lamp on VIN: 1G2FS87S1F
first car came in with stall and runs rough complaint,scan show code 34 and 42 but i cannot find nothing wrong,so i erase codes and i tried car on the road and one time it cut briefly and check engine light came on briefly too.back to the garage i scan the eng... Trouble codes: 34 (maf), 42, EST
1995 Pontiac Trans Sport 3.8L alternator VIN: 1GMDU06L3S
Need some help with this one it is driving me crazy.This pont we bought and new it needed a new motor so my boss got a motor and trans.The year of the engine and trans are a 93.I told him the i would have to change everthing over and i used the sensors,injecto...
1997 Pontiac Grand Prix GT 3.8L Poor Idle Quality, Surge, Stall, High cold idle VIN: 1G2WP52K6V
Hi all, we've been dealing with these symptoms on this car for a year and a half. I have only been able to witness it on a couple of occasions. I cleaned the IAC passage with good results for a while and then replaced the IAC which worked good again for a whil...
1997 Pontiac Grand Prix SE 3.8L rotor/pads noise VIN: 1G2WJ52K7V
I know brakes are brakes and have done a million brake jobs. This is my sisters car and it is driving me nuts. Has anyone had this, or id this a common problem I am an asian mechanic Toyota/Honda I can see no signs of contact with any other components I have o...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52L7S
Well after remiving the PCM and put the old one back in, I re-tested everything again. COming up with Bad PCM again I hooked up the lab scope and backprobe teh PCM yet again. Still getting a good wave pattern, I shut the car off. I came back to it in 10 mins a... Trouble codes: P0342 (cam signal circuit).
1995 Buick Riviera 3.8L MIL Lamp on VIN: 1G4GD2213S
Thanks to the replies we had. The scan tools we use..OTC Genisys it was giving us a bunch of history codes, we borrowed a snap on scanner and it gave us a transmission code..we didnt get any trans codes with the otc.. we sent the car to a trans shop but didnt ...
1998 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K2W
This vehicle came in with a no start condition. The vehicle had injector pulse but no spark. I checked for power at the ICM and power was present(battery voltage pin P at ICM). I checked power out at pin N at ICM (10 volt reference to crank and cam sensor) and...
1994 Cadillac Eldorado Touring 4.6L No Start VIN: 1G6ET1290R
Thanks again for the help on this car. Most of the replies I recieved delt with the passkey system and helped me to get off of the wrong track. I check the passkey system as suggested by several people and found it to be working properly. So rethinking my path...
1991 Chevrolet Corsica LT 3.1L fuse melting VIN: 1G1LT53T1M
customer decided to try an electrical shop,but the advice here on the board help me learn alot of different techniques for future electrical problems,and i know i will apply them in the future. thnx for all the help and advice.
1991 Chevrolet Cavalier RS 3.1L heating VIN: HJWE347856
I'd ck your engine coolant temp at the heater core lines going into the firewall and check for a possible restriction. An infra-red temp gun works the best. Also make sure to ck and see that that damper door for the temp control is moving closed all the way. I...
1996 Chevrolet Blazer 4.3L headlights VIN: 1GNCT18WXT
Should I have have diagnosed the nonfunctioning headlights first or replaced the broken hazard switch/nonfunctioning turn signal switch first? Well, I picked the multifunction switch to R&R first. went together smooth as grease. hmmm, Very Smoothly, I thought ...
1997 Chevrolet S10 4.3L Stall
First, I'd like to thanks each of the thirteen folks who replied to my post. I sincerely appreciate the time you took to help. When the vehicle first came in it wouldn't idle any longer than two or three minute minutes in park in my shop. After wiggling, pro...
1997 Chevrolet Express 3500 5.7L engine VIN: 1GCHG39R4V
I cannot belive it. It was carbon causing the knocking sound. I first tried letting the engine pull in Motorvac Chemicals through the PCV Hose. No Change. I then tried water like several suggested. Noise was 90 percent gone. We then put covers back on and ran ...
1991 Oldsmobile Custom Cruiser 5.0L abs VIN: 1G3BP83E3M
We put another used abs unit on and this solved the problem
1999 Oldsmobile Silhouette Premiere 3.4L tcs VIN: 1GHDX03E8X
First I would like to mention that all of these control modules have been updated, DO NOT buy a used one, although the OEM replacement is expensive it is the only fix. The new module also operates differently from the way operation is described in the manual. ...
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