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Prev Professional Automotive Repair Technical Discussions for September 24, 2004
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L Stall VIN: 1G4CW52LOR
Ihave a strange one here, This car will stall out sometimes . Problem is it only does it when the air is on and when the compressor clutch disengages not when it engages . I have seen it happen myself. I let it idle with air on for one hour and it shut off 2 t... Trouble codes: P0341
1995 Buick LeSabre Custom 3.8L Poor Idle Quality VIN: 1G4HP52L6S
Head gaskets were the main concern on this vehicle, so did head gaskets, went on the test drive and everything was fine till I got back to the shop. Started to idle rough, misfire on number five. started the old swap game, moved the coil and misfire followed t...
1989 Cadillac Fleetwood 4.5L windshield wipers VIN: 1G6CB5154K
greetings every one this is my first post but you all have helped me fix lots of cars this is a great group of people thanks for all the help you've given todays problem is a caddie with wipers that wont turn off the wipers work normaly at all speeds but will ...
1990 Cadillac DeVille 4.5L ebcm VIN: 1G6CD5337L
We keep getting an ABS light and Code 21. All tests pass except there is no voltage at pin 17 on EBCM or to main valve connector. There is power to the EBCM at pin 2. We have tested and enhanced all grounds and inspected wiring. We cannot see how the valve blo...
1995 Cadillac Seville STS 4.6L steering VIN: 1G6KY5292S
HELLO TECHS this caddy is well maintained veh.after checking front end suspension, drive axles , tie rods, ball joints, engine mounts, took cvjoints apart can't come up with this crunch noise have found nothing so far . when driving veh. turning some what shar...
1991 Chevrolet C1500 Cheyenne 5.7L Stall VIN: 2GCEC19K6M
This vehicle stalls when put in drive, it idles great with no load but as soon at its put in drive it misfires then dies. The IAC is functional it just does not seem to be able to re-act soon enough. When using a scanner to force it into "backup fuel mode" or ...
1995 Chevrolet K2500 5.7L Poor Idle Quality, Hesitation, Surge, Stall VIN: 2GTFK29KXS
This truck has been worked on at another garage .Customerwants me to try and get it working. Truck has no power. Step on gas and it falls on its face.Won't accelerate . 13 PSI fuel pressure ,1qt volume 30 seconds cranking .Tried known good throttle body assemb...
1996 Chevrolet C2500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: 2GCFC29R7T
misfire on cylinders 3,5,7. fuel related. propane enrichment causes misfire to go away. replaced 3,5,7 injectors after fuel injection flush had no effect. 3 and 5 still misfiring. replaced injectors again, and replaced cap, wires and plugs. scope shows normal ... Trouble codes: P0300
2001 Chevrolet Suburban 2500 6.0L Poor Idle Quality, Stall, Misfire VIN: 3GNGC26091
vehicle came in with rough idle 1 week ago after cheaking truck out noticed 2 cracked plugs so I replaced plugs and wires with oem parts .still same problem. With scanner on truck misfire travles to different cyl.but not enough to set a code. I removed the inj...
1997 GMC Jimmy SL 4.3L Speed o VIN: 1GKDT13W0V
Here is one for you guys, This jimmy was bought from an auction and the speed o reads about half speed of actual speed. We checked with a scanner and the speed o and the VSS agree on speed but the front abs sensors read correct speed. Changed VSS and checked f...
1999 GMC Yukon Denali SLE 5.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GKEK13R5X
truck has continuos missfire changed injector, motorvac, gm top engine clener no improvment!!! Trouble codes: P0306
1995 Pontiac Grand Prix SE 3.1L security VIN: 1G2WJ52MOS
car was towed in as no crank condition,replaced theft detterent module was replaced,car runs now but Security light flashes all the time,alldata says module did not program and system should be checked for faults.Any ideas on where i might start? thank you for...
1995 Pontiac Grand Am SE 3.1L Hesitation, MIL Lamp on VIN: 1G2NE15MOS
At closing time, a guy drives in and asks if I could look at his car. He thinks he might need a water pump. I was closing for the week-end, but agreed to take a look. At a glance I don't think that the water pump was bad, but spotted something that looked more...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Regal Gran Sport 3.8L Poor Idle Quality, Cuts out, Misfire VIN: 2G4WF14L5N
thanks to all for your time and expertise...keith from washington the crank sensor was the problem...thank you,, (this had a new sensor on it) we compared the ignition pattern with modis. amp clamp on the pink ignition power supply, the old sensor had unevenly...
1989 Chevrolet Beretta 2.8L Poor Idle Quality, Stall VIN: 1G1LV11W6K
just to let every one know that this vehiclew had a problem in the wiring harness going to the tps sensor. it was an intermittant problem and hard to locate. thanks for everyones help.
1990 Chevrolet Lumina Euro 3.1L No Start, Poor Idle Quality, Surge, Cuts out, Stall VIN: 2G1WN14T8L
Thanks to you all I found number 3 cyl. injector shorted I removed the upper intake and ohms checked all the injectors and they all read 12.2 ohms except number 3 which was 5.1 ohms replaced that injector and the cars runs good still not great but it has set f...
1997 Chevrolet Cavalier Z24 2.4L Poor Idle Quality, Misfire VIN: 1G1JF12T6V
think we finaly fixed this one, customer has had the vehicle a week and no problems yet. found out after I had posted for help that the running problems started after the customer had replaced the o2 sensor with an aftermarket unit. The o2's we had tried were ...
2002 Chevrolet Impala LS 3.8L wiper VIN: 2G1WH55K42
Thanx for the help - most help said check wiper module, recheck crankarm update installation - we re-installed it and set it up as per tsb instructions, didn't think we fixed it. Customer called back - no problems since!
1997 GMC K1500 Sierra SL 5.0L air bag VIN: 1GTEK14M3V
sorry it tok so long but the customer didn`t bring the truck back but i was told that the new module took care of it i want to thank everyone who replied you guy`s are great thanks !!
1998 GMC K3500 Sierra SL 6.5L Cuts out VIN: 1GDJK34F5W
Thanks to everybody that replied. Most of the replies pointed to the injector pump module on the side of the pump. We were unable to confirm that the module was at fault thru testing but the customer agreed to pay for a new module whether it worked or not. W...
2001 Pontiac Aztek 3.4L gauges dash lights stereo VIN: 3G7DA03E1S
thanks to gus for the reply. sent to dealer new BCM installed and reprogrammed by them with tech2. all is well again in green bay.
2002 Pontiac Grand Am SE1 2.2L No Start VIN: 1G2NF52F12
well this one is fixed. thanks for your replies. The problem was in the security system. The fix was real easy. Turn the key on for 10 minutes. Then start it. I can't explain it. I really don't have any info on this system. It's really kind of scary. I mean si...
1997 Saturn SW2 1.9L No Start VIN: 1G8ZK8276V
The responses were great,as most of you stated,the fuel pump pressure should not bleed down rapidly,we replaced the fuel pump and cured that problem,the car starts quicker and smoother than before,the second problem where we had no spark did not come back in t...
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