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Prev Professional Automotive Repair Technical Discussions for August 9, 2005
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Open Help Requests for GM
Help Request Answers
1990 Buick LeSabre Custom 3.8L Hesitation, Stall VIN: 1G4HP54C1L
Hello everybody. This Buick is very hard to start in the mornings or after it's been sitting for awhile. Once it finally starts it runs horrible for about 1 or 2 minutes. Won't rev up, pops and backfires. I hooked a scanner up to it and noticed the fuel trims ...
1999 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G4H952K6X
This vehicle came in because it was running rough. Tech 2 indicated cyl. 4 was misfiring. When I pulled the #4 spark plug it was white. I pulled two more plugs and they were both white as well. I monitored the Ho2s and the fuel trim on my test drive. The Ho2s ... Trouble codes: P0300 (Random Cylinder Misfire)
1992 Chevrolet Camaro RS 3.1L No Start VIN: 1G1FP23T3N
Hi techs, TIA for any and all responses. Vehicle presented as no start. Fuel pressure and volume good. Spark weak. Replace broken dist.cap and burnt rotor. Spark now good. Still no start. Move onto injector pulse. None. Check power, battery voltage on both sid... Trouble codes: 34 (Map sensor too low)
1995 Chevrolet Camaro Z28 5.7L oil pressure VIN: 2G1FP22P2S
Hey guys, Hope you can help me out today. I have a 95 camaro 5.7 vin p engine where the oil pressure dash gauge is going to 0 psi and the check gauges light is coming on. I have put a oil gauge on engine, i have aprox 5 psi oil pressure at idle (800 rpm), 8 p...
1998 Chevrolet C1500 Cheyenne 4.3L MIL Lamp on VIN: 1GEC14WZ24
Good morning all, This truck keeps setting the P0420 dtc, and I have a feeling it's due to the aftermarket catalytic converter that has been installed, it is one of those generic looking one's with an air pipe on it that is capped off since this truck is not e... Trouble codes: P0420 (Catalyst below efficiency)
2001 Chevrolet Silverado 2500 HD 6.6L Stall VIN: 1GCHK23131
Customer called said truck stalled on highway, We towed in crank no start. Smelled gas - Strange because this truck is a diesel... We determined customer filled truck with gas at last stop. Has anyone ran into this on the duramax engine before. In the past we ...
2001 Chevrolet Impala 3.4L vtd VIN: 2G1WF52E21
This vehical came in as a no start, but the customer could get it started intermitanly. after searching and playing, I found that if you leave the key in the start position for 5-6 seconds it will crank and start. I checked the power at the starter and it gets...
1998 GMC Savana 2500 5.7L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GTGG25R9W
The problem we are having is that at differn't times, mostly hot but not always, no. 4 injector will stay wide open, which if vehicle is running will literally poor fuel out of the tailpipe plus other symptoms like poor idle, skipping,smokes out tailpipe and o...
2002 GMC Yukon XL 1500 SLE 5.3L steering pump VIN: 3GKFK16Z22
after replacing the power steering pump,the steering is fine off idle.when you are sitting at idle the steering gets stiff only at idle,if you increase the idle speed by 200 rpm the steering is fine.i did not see any kind of switch that would tell the computer...
1993 Oldsmobile Cutlass Ciera 3.3L Poor Idle Quality, MIL Lamp on, mil and temp light VIN: 1G3AG54N8P
This vehicle will start flashing the temp light and check engine light simultaneously while driving. they will just start flashing while driving but it wont do it all the time. I have checked and the engine is at normal operating temp when it happens(so its no... Trouble codes: 14 (gounded ect switch), 21 (o2 sensor lean)
1984 Pontiac Firebird Trans Am 5.0L convertor, pump VIN: 1G2AW87H2E
hi all i need some real tranny help here, I rebuilt this tranny its a 700R4 all new parts new convertor installed into vehicle and it was making a horriffic rotational noise consistent with engine rpm. it changes pich with rpm and you have to really give it ga...
1995 Pontiac Sunfire SE 2.2L belt tensioner VIN: 3G2JB1244S
HI I had replaced the head gasket in this vehicle and notice a noise when snaping the throttle was coming from the belt tenioner it would pull back and then wack when you rev the engine so i changed the tenioner and belt thought it was cured and two days latte...
1996 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1GNE52T4TC
this vehicle has code p0172. i have checked fuel pressure and for leaking injectors. i have also checked the operation of the map sensor, egr valve and evap system. there is no indication that any of these components are at fault. tps voltage is reading .43v a... Trouble codes: P0172 (fuel system too rich)
2001 Saturn SC1 1.9L MIL Lamp on VIN: 1G8ZN12801
Grettings fellow Technicians. I have 2001 Saturn with your 1.9L engine, SOHC. When the engine starts, she idles up to about 3-4'000 RPM's and remains at that speed. If I disconnect the IAC, the high idle remains the same. I used a Solus, MT200 and Mentor,,, al... Trouble codes: P0500, P0507, P0509

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Park Avenue Ultra 3.8L No Start VIN: 1G4CU5413Y
Sorry it took so long to close it, Replace PCM & that took care of the problem. Thanks for all who reply Trouble codes: 3031 (key decoder device in assembly learn mode).
2002 Cadillac Seville SLS 4.6L Traction Control/ABS VIN: 1G6KS54Y9Z
Decided to put EBCM in it since we could never get a current failure. Did not verify symptoms after replacement, and customer has not come back. Looks like this fixed it.
1982 Chevrolet Corvette 5.7L long crank time VIN: 1GAY8787C5
The consensus seems to be that some agree with me, that these tbi units didn't hold pressure, the others say they do. The customer is going to be the judge here and she says it runs the way it always has after we replaced the fuel pump. So, that having been sa...
1988 Chevrolet S10 2.5L Mechanical VIN: 1GTC32XP92
Thanks for all the great replies and info. In summary, the gears go out but not that often. The cam gear is pressed on and removing the cam is recommended. No one said the valves bend (my main question. So I let this one roll. The customer needed his truck bac...
1995 Chevrolet G20 Chevy Van 5.7L rear suspension VIN: 1GBEG25K8S
Well, Thanks to all who responded. The overwhelming response was to go directly to the slip yoke at the transmission. Yes it was grungy and by cleaning the splines and lubricating all surfaces it works great. All noise has been eliminated and one of our very b...
2000 Chevrolet Blazer LS 4.3L remote locks VIN: 1GNDT13W4Y
Thanks for all your help it seems the BCM has to be reprogramed.I cant do that with my Vetronix sps so Im going to wait it out.
2001 Chevrolet Silverado 1500 5.3L No Start, Stall VIN: 2GCEC19T61
Thanks to all who responded to my post. All replies are appreciated. The overwhelming majority said the problem was within the fuel pump/sender assembly. I have not had the vehicle back to my shop since original visit, therefore I'm unable to verify the failur...
2000 Oldsmobile Intrigue GL 3.5L No Start VIN: 1G3WS52H8Y
The fix is a new battery terminal and puting the crank fuse back in the right slot. I had high resistance in the small cable at the battery and I had put the crank fuse in the wrong slot when I had checked fuses. Thanks to all who replied.
2002 Oldsmobile Alero GL 2.2L temp gauge VIN: 1G3NL52FX2
well this one did not get fixed. i could never duplicate the problem on this vehicle. the customer did bring it back when it was doing it and i testeed the alt. and it was not charging and had about 10 codes all pertaining to low voltage, so i told her it need...
2000 Pontiac Grand Am SE 3.4L dies&wont restart VIN: 1G2NG12E2Y
my brother in law could never leave this car with me long enough to check out fully. It will need to road tested extensively as it only dies after about an hour of driving and he can not do without it. Therefore I am closing this request.
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