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Professional Automotive Repair Technical Discussions for April 30, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1995 Buick Roadmaster 5.7L Poor Idle Quality, Misfire VIN: 1G4BT52POS Cust. complained of a surge at cruise. Car got here w/ a rough idle and what seems to be a miss more on one cylinder than any other. I ohmed all injectors and all are within spec. Fuel pressure and vacuum are good as stated in results above. Replaced fuel pres... |
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| 1990 Cadillac Brougham 5.7L Stall, MIL Lamp on VIN: IG6DW547XL hello all you gm techs .i have this 90 caddy here ,it will sometime stall at the stop light.sometime it will start right away, sometimes it will not.customer notice that the cruise controll move the accell cable back and for without the key on .a code 42 43 se... Trouble codes: 42 (43 -), 43 |
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| 1989 Chevrolet Camaro Iroc-Z 5.0L low power(?) VIN: 1G1FP21E1K Customer brought vehicle in for "check up". Finding no problems with it, - he now wants to know what I can do to give him more power. I really cannot find any real "problem" with the engine, and it seems to run fine to me, - could probably have a bit more "get... |
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| 1994 Chevrolet K3500 7.4L Cuts out, Misfire VIN: 1GCHK33NSA vehicle came in with a backfire thru the tailpipe.it runs good cold, but when it warms up, 1 cylinder will not fire.the plugs, wires, cap, and rotor were replaced due to being worn out.i found 1 lifter that was fully extended.replaced all lifters. now the back... |
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| 1994 Chevrolet S10 LS 4.3L Misfire VIN: 1GCCS19W2R This one has been stuck at a shop that I do electrical work for. It was at 2 dealers and 2 shops before these guys got stuck with it. Their original complaint to me with it was horrible backfiring and popping through the exhaust when the EST is connected, but ... |
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| 1995 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1YY32P5S Hey guys, Hope someone can help with this Vette. Has previously "blown" 2 sets of front O2s, sets DTC 63 and 64. Exhaust pipes and back of car covered in soot. I cleaned spark plugs, bench tested O2s and started over. Initially scan data looks ok-both LTFT and... Trouble codes: 63 (bank 2 o2 circuit), 64 (bank2 o2 lean) |
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| 1995 Chevrolet Caprice Classic 5.7L water pump drive shaft VIN: 1G1BL52P3S HI there, I have exhausted all my resources to find out if there is supposed to be play in the water pump drive shaft where it comes through the timing cover. I replaced the seal 3 months ago and now it is leaking again. I removed the seal and there seems to b... |
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| 1996 Chevrolet Caprice Classic 5.7L harsh engagement VIN: 1G1BL52P8T Howdy trans gurus! I rebuilt a 4l60e in a 96 impala ss last year and used a superior shift kit, It worked great but a couple of months later it was in for something different and I noticed it went into drive and reverse hard. I checked and it had a pending co... |
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| 1998 Chevrolet Monte Carlo LS 3.1L engine VIN: 2G1WW12M1W This one is driveing me nuts!!! Car came in with lower intake gasket leaking antifreeze. Replaced all intake gaskets with Fel-Pro gaskets. Reassembled engine and started. Engine had valve tap. Found student had missed tightening one rocker. Removed valve cove... |
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| 1999 Chevrolet Monte Carlo LS 3.1L brk pads VIN: 2G1WW12M3X customer complaining of wearing out front pads about every 6 months orso. one time it will be both sides then the next it will be right then next time left. we've tried top of the line pads,rotors,calipers. same thing every time. running out of ideas,need help... |
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| 2000 Chevrolet Impala 3.4L abs light VIN: 2G1WF52E81 problem child here. This car gets an erratic abs light on, then off. code p1233(r/frt speed sensor) sets. First time it was in the shop, I found 3 speed sensors to be out of spec ohms. replaced, fixed for a couple weeks. Then light flickered again, ran Diagnos... |
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| 2000 Chevrolet Lumina 3.1L Charging VIN: 2G1WL52J7Y hi guys got a weird one a 2000 lumina that cust says started making a radio interferance type noise inside car dash area when she picked car up st dealerafter some kind of fuel leak repair looks like poss a injector top plenum was off if you diconnect alt plug... |
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| 2000 Chevrolet Blazer LS 4.3L 4 wheel drive ecm four wheel drive indicator lights started flashing and controller would click constantly.Tested power and ground they were good.Replaced controller problem went away about six months but the clicking sound returned.The system will switch from 2 to 4wheel drive... |
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| 1997 GMC C1500 Sierra GT 4.3L Surge, Misfire, MIL Lamp on VIN: 1GTEC14W9V This vehicle has been in for repairs numerous times with us and at another location. our first chance to look at this vehicle was for a no start condition. upon initial inspection the spark plugs and ignition wires had been replaced at another location. after ... Trouble codes: P0300 (random misfire detected) |
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| 2001 GMC Sonoma SL 4.3L MIL Lamp on VIN: 1GTDT19W71 hi. po410 code reoccuring. troubleshooter describe problem as too much variation in fuel trim between open and closed loop. o2's are switching ok(and even). the ussuals(tps, map,egr etc.) are all normal. will be testing inj balance tommorrow but has anyone had... Trouble codes: P0410 |
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| 2000 Pontiac Grand Prix SE 3.1L trans shift VIN: 1G2WK52J6Y Hello, This car is downshifting at inappropriate times. Suspected VSS . Installed new one. No change. Took car for a test drive with scanner. Vehicle speed (on scanner) at times would not be constant. At times it would vary 20mph within less than a second. See... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1989 Chevrolet C2500 Cheyenne 5.0L No Start VIN: 1GCFC24H8K this blows my mind, but here goes, had no spark, fuel and impulse was great, found that the rotor had burned thru to the dist. tower were it sits, guess it was grounding out back into the dist. really think that this help line is great. thanks to all. i really... |
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| 1998 Chevrolet K1500 Cheyenne 5.7L ABS brakes VIN: 2GCEK19ROW left front sensor out range drops from 6 mph to 3 mph and this actives the abs motor replaced left front sensor and this corrected the problem need two people test one to drive and one to operate the scanner thanks to all that replied |
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| 2000 Chevrolet Tracker 2.0L starter VIN: 2CNBJ13C6Y Thank you for the replies. After making sure the flex plate was not damaged or the spacers were not installed correctly, my only recource was to replace the backing plate. The Tracker from hell is now starting like a dream! |
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| 1972 GMC c10 350CID Starting VIN: CCE142Z134 I got a great number of replys on this post. Everyone pretty much said same thing. I also was given a way to measure starter to flywheel teeth clearance. The shortcut was that it should be about a paperclip of clearance. Sure enough it was way too much clearan... |
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| 1999 GMC Sierra 1500 SL 4.8L Cooling Systems VIN: 2GTEC19V9X No real help on this one. Extensive research produced only one hint of what has been happening with these 'new generation' engines. Pretty much across the board people are not finding problems with either the heads or the head gasket but they are experiencing ... |
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| 1989 Oldsmobile Cutlass Ciera SL 3.3L Rear wheel bearings VIN: 2G3AM51N0K Thanks to all 8 people who responded to this help request. It seems that other than replacing with new assembles, there is no way to replace the bearing by themselves. My customer is still driving the car with these noisey bearings, and has decided to wait unt... |
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| 1999 Oldsmobile Silhouette Premiere 3.4L Tail Lights, Turn Signals, Back up lights VIN: 1GHDX03E3X I received many replys about the grounds in the lights at the rear, the customer however has not brought the vehicle back. I have tried numerous times to get them to bring it back in but thtey have not done so yet. |
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