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Prev Professional Automotive Repair Technical Discussions for June 13, 2005
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Open Help Requests for GM
Help Request Answers
1984 Buick Riviera 3.8L No Start
This one came in towed on a hook with a no start.I got in it and held the pedal to the floor and it started drove it in. Ok it was flooded. I hooked my pressure gauge up to it and clamped the fuel lines and the pressure dropped in less than a minute.So I recom...
1992 Buick Roadmaster Limited 5.7L Surge VIN: 1G4BT5378N
This engine use a negative back pressure vaccum operated EGR valve with an ECM controled vaccum solenoid that should be modulated with variable duty cycle at a frequency of 32 hz according to mitchell database... On the Genisys or Snap-on scanner, I get absolu...
1993 Buick Regal Custom 3.8L MIL Lamp on VIN: 2G4WB54L4P
Hello all.This car came in with coustomer complant of check ac. And check for tune up with no complant about cars performance.Checked ac and found no comand from pcm to turn on ac relay replaced pcm ac fixed. Performed stanterd tune up.On test drive check engi... Trouble codes: 41 (cam sneson sig.)
1996 Buick Century Custom 3.1L cooling fans VIN: 1G4AG55MT6
hay to everybody out ther today making a living the hard way. i have a question for all of you. i am working on this buick and i have no power to the pink wire at the fan relays. from the shop key system it tells me that there is a 10a. fuse taped to the harne...
1997 Buick Park Avenue Ultra 3.8L No Start, Cuts out, Stall VIN: 1G4CU5217V
Your mission if you choose to accept it is..Vehicle came in for a complaint of stalling while driving or at a light. Began initial checks, started right up, drove with no problems. Fuel pressure KOEO is 44psi, KOER 41 psi, and at times it will drop to 31psi an...
1982 Chevrolet Corvette 5.7L No Start VIN: 1G1AXY878L
This car is a no start most of the time. Crossfire TBI. Has 13 lbs of fuel pressure & what looks like to be very good spray from both injectors, but no start. Spray some carb clean or poor in a little gas & it fires right up. Stays running but is very lean. Wo...
1990 Chevrolet Corvette 5.7L voltmeter VIN: 1G1YY2382L
voltmeter drops when rear brake lights b/u lights or turn signals are on or trunk release is pressed. no other problem. voltage at gauge drops .5 volts or so. customer replaced battery because of extended storage/battery drain and this problem started. we grou...
1991 Chevrolet Lumina 3.1L Poor Idle Quality, Surge, MIL Lamp on, idles very high VIN: 2G1WN51TXM
Original readings from start up. vehicle will not start and run on its own until coolant temp reaches 138 degrees initailly at times other times starts and runs with cts lower. RPM 1450 O2 cycling 170 to 757 mv tps(v) .60 IAC pos 0 Base PW (ms) 1.5 a/f ratio ... Trouble codes: 35 (IAC problem), 44 (Lean exhaust)
1992 Chevrolet C2500 Cheyenne 6.2L Solenoid B VIN: 1GCGC24F0N
I have this pickup with a 4L80-E, and code 81 (shift solenoid B circuit). As stated below a new repair harness has been installed, as well as a new TCM from the dealer. We verified that the job was done correctly, and we had the proper voltages. I am familier ...
1993 Chevrolet Corvette 5.7L No Start VIN: 1G1YY33P51
cant believe I am having a problem with a no start. they are usually pretty easy to nail or can eventually be figured out. I got this car in shop on wrecker , customer just purchased in arizona recently. came in with no injector pulse and no spark at plugs. ...
1996 Chevrolet Lumina 3.1L Misfire, MIL Lamp on VIN: 2G1WL52M6T
hi guys any info on this would be appreciated.the car came in this morning with a PO300 cylinders 2 and 5 were misfiring.i swapped out the 5,2 coil still no spark put on a control module still no spark left the module on and put a new coil on 5,2 and we got sp... Trouble codes: P0300
1997 Chevrolet Astro 4.3L limp home VIN: 1GNEL19W5V
Hi everyone, After we did a rear main seal, The van is stuck in second gear. The safty switch connectors are melting tight as usual in these vans. we tried to remove them, But they would not come out. Would the safty switch cause this condition... HELP
1997 Chevrolet Cavalier 2.2L Poor Idle Quality, Hesitation, Surge VIN: 1G1JC1246V
we hsve spark,fuel, it runs acts like plugged exhust even with exhaust disconnected at manifold.
1998 Chevrolet Malibu 3.1L very long crank VIN: 1G1ND52MW4
This is my wifes vehicle and it has had this problem since new. I've been fighting with this thing on and off for seven years! It has a very long crank when starting at all temperatures and condtions. Depressing the gas pedal about 1/16 of the way and the vehi...
2000 Chevrolet Silverado 1500 5.3L oil pressure VIN: 1GCEK19T5Y
This truck came in with no oil pressure. We did an oil pressure test and I posted the results. According to all-data, we are in the specs. The problem is the gauge reads 0 at idle 20 at [...]. At stop signs the low oil pressure light comes on. We checked wi...
2000 Chevrolet Lumina 3.1L Poor Idle Quality, Misfire VIN: 1GNE52JXY6
Hi, this is this months problem child. this car came to us with a running rough complaint, we could not duplicate, but it did have the p0300 and an egr code p1404 egr position error. we did our normal checks and found the intake and head gaskets leaking coolan... Trouble codes: P0300, P1404
2002 Chevrolet Silverado 2500 HD 6.6L Cuts out VIN: 1GCHK23122
Hello to all, new customer no history, complant is intermit. When kicking down to pass a vech. truck falls over no power has happened three times in 2 months. no trans codes, was just serviced,no engine codes, pids look fine.truck is stock. Has any fine GM tec...
1993 GMC Safari SLE 4.3L Poor Idle Quality VIN: 1GKDM19W8P
idles rough.plugs were replaced because they were fouled.checked fuel pressure,timing all codes were stored.did note vaccum at idle is low (13 inches of vaccum)checked ignition,and noted 3 cylinders on drivers side seemed weak.did block test and no probl...
1994 Oldsmobile 98 Regency Elite 3.8L No Start, Cuts out VIN: 1G3CW52L2R
customer brought in said overheated and stalled, no restart. went out to check, started, but temp gauge maxed out. message center said hot but was at normal temp. charge light goes on and off but always charging. and car will stall when it wants to.can not get...
2000 Oldsmobile Intrigue GL 3.5L cruise control VIN: 1G3WS52H0Y
I suspect engine computer. Would like second opinion. Anyone else experience this problem?

Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick Electra Park Avenue 3.8L No Start, Stall VIN: 1G4CW51C1J
First. thank you all for helping me with the repair of this problem. All the diffrent ideas brought together the information I needed and lead after some wandering directly to the answer. I was forcedby your comments to revisit the areas I thought I had tested...
1990 Buick Regal 3.8L Cuts out, Misfire, MIL Lamp on VIN: 2G4WB14L5L
This is a new one on me. First let me tell you the fix. New fuel pump. Fuel pressure never wavered when car start 'missing'. Apears that fuel volume was the problem. Still cannot explain the wacko readings on my red brick. Sorry for the delay in posting. Thank... Trouble codes: 42 (est problem).
1990 Buick Century Custom 3.3L Stall VIN: 1G4AH84N5L
Thanks to all 13 of you that replied so quickly! The first thing I did was to re-install the old ecm.The car fired right up just like normal,15 minutes later it died again.Next I changed out the crank sensor and thoroly(sp) cleaned the plug.After the installat... Trouble codes: 42 (Electronic Spark Timing EST Circuit).
1998 Cadillac DeVille Concours 4.6L cam sensor VIN: 1G6KF549XW
Got it fixxed. I repalced the crankshaft position sensors and that still did not fix the problem. I had to send the car to get the pcm reprogramed. After that the car is running great. Thanks for all the help.
1993 Chevrolet Cavalier RS 2.2L abs codes VIN: 1G1JC5448R
al you hit it right on the head mr , test drove the vehicle till the cow finally came home lol , the right front wheel speed sensor reading incorrectly , the other sensor's would read 5 mph and the right front would read o mph causing the abs to dump the fluid...
1997 Chevrolet S10 4.3L Hesitation VIN: 1GCCS14X4V
Unfortunately this one is not definitely solved due to access and time issues to Dad's vehicle. I received some great replies that will definitely help isolate this one although I suspect either a skewed MAF or O2 sensor issue. One particularly noteworthy re...
1998 Chevrolet K1500 Cheyenne 5.7L Hesitation, Surge VIN: 1GTP675KRG
It appears 52# fuel pressure idling is normal with updated MFI system, I used a line clamp to block return partially till guage said 65# and I still had problem. Flow was great- Felt like a slight lean hesitation taking off from stop, or a light spark miss-not...
2003 GMC Sierra 1500 SLE 4.3L airbag VIN: 1GTEK14X23
Thanks for all the help i bought new airbag and module ,lights out all okay
2003 Hummer H2 6.0L comp
1989 Oldsmobile Cutlass Ciera 2.5L No Start, Stall
Thanks to those who replied to my post. This one is fixed. Some thought a bad ignition module, so I removed it and had it tested at our local Napa store. It tested good. The crank sensor was somewhat cracked so I replaced it. Started it up, same thing, start a...
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