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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 8, 2004
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Open Help Requests for GM
Help Request Answers
1988 Buick LeSabre Limited 3.8L Excessive Emissions, Poor Fuel Economy, RUNS RICH VIN: 1G4HR14C8J
looked at scan data & seen that the o2 was fluctuating from 0 volts to 300 mv, 450mv max & block learn & integrator was trying to richen fuel mixture & gas analyzer also showed that, when acheaved closed loop co would sky rocket to 7% & higher. thought that o2...
1992 Buick Riviera Luxury 3.8L air bag VIN: 1G4EZ13L9N
this car sets a code 41 current and history after 10 min. of running,,ign fuse is good,,power to derm and arming sensor is good,grounds at g100&g103 are good,,trouble chart asks to ohm the arming sensor term.a&c,,should be OL,,it is,this goes across a 3480 ohm...
1995 Buick Park Avenue 3.8L Misfire VIN: 1G4CW52K9S
Hello all, This has been a true alligator of a car. Came in with symptoms of runs rough, stalls at idle, misfires on accel. Pulled codes and found 0321 & 1361. With engine running, when problem occurs tach and charge meter become erratic. Disconnecting alter... Trouble codes: 321 (Spark reference signal missing), 1361 (IC circuit grounded)
1995 Buick Century Special 3.1L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1G4AG55M9S
Hello ATN, Hair puller Buick here. First scan showed multiple codes, cleared codes and 341 cam sensor code returned after car surged and ses light came on, also took movie on MT2500 Snap-on scanner. Had many strange readings such as vss dropping to 0 mph, cool... Trouble codes: 341 (Intermittent Cam Signal), 755 (f31 trans sol b error), 740 (tcc error), 1650 (Quad driver B error)
1995 Buick Park Avenue 3.8L battery, Alternator not chraging VIN: 1G4CW52K9S
I'm getting 10-11 volts when running and it's running only on the battery! I have went through all the wiring looking for a short or open in wiring. I have no voltage coming out of the connector with the one red wire. The fuses are all check and good, the guag...
1978 Chevrolet Corvette 5.7L relays VIN: 1Z8789S443
Hi Guys and Gals, I'm looking for some info on this vette. It came in for a drain on the battery and I tracked it down to a relay that stays powered up. Unfortunately I can't seem to track down what the relay is for. It might be for the seat belt system. I unh...
1990 Chevrolet Corvette 5.7L Surge, Cuts out VIN: 1G1YY2387L
Custemer complaint: When hot in gear with a/c on at stop lights you feel a little jerk. Engine was in need of good tune-up, scoped and replaced cap, rotor, plugs, PCV, wire set, oxygen sensor and fuel filter. Set timing (was retarded) and flushed fuel injector...
1994 Chevrolet Caprice Classic LS 4.3L Poor Idle Quality, Misfire VIN: 1G1BN52W2R
Greetings to all Opti Spark Gurus, we are on a good track thusfar, but after searching the data base, I believe this will be a good addition to the fix data base as to understanding the Opti Spark system and its funtion. This problem came on all at once, ther...
1995 Chevrolet Blazer 4.3L No Start, MIL Lamp on VIN: 1GNCT18W2S
when the blazer came in it had no spark at the plugs but spark at the coil...put a cap and rotor on and solved that problem...then it still would not start...had spark but no injector pluse...checked the crank sensor and it tested fine...put a computer in and ... Trouble codes: P1351 (est output high or pulses detected when open)
1996 Chevrolet Camaro Z28 5.7L MIL Lamp on VIN: 2G1FP22P0T
this car came to us from a speed shop and has some high performance upgrades. these codes come sometimes after start up, sometimes in the shop, and sometimes you need to drive the car(not very far, usually not even out of the shop) tested all circuits and no p... Trouble codes: P0300 (misfire), P0443 (evap), P0753 (1-2 shift solenoid), P1652 (vehicle speed sensor), P1864 (torque convertor clutch)
1998 Chevrolet C1500 Suburban 5.7L Dual ac system VIN: 3GNEC16RWG
Hello, The Suburban originally came in with the complaint of ac not cold enough in hot weather one year ago, July 24, 2003. (P)S) we are in south florida & the temp is in the 90's !!). The low side pressures were too high at idle and improved when accelerating...
1998 Chevrolet Metro LSi 1.3L Hesitation, Cuts out, Misfire VIN: 2C1MR5229W
Hi all. I got a funny one here. This metro has a hesitation/missfire between 1500 and 2000 rpms hot or cold. Idles normal and once past about 2000 it runs normal. In park or neutral there is no problem accelerating. Only under load. Feels like an EGR problem b...
1999 Chevrolet Tahoe LS 5.7L No Start, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1GNEK13R9X
Hi all, thanks in advance for your help. This one has us stumped. Customer complaint was hard start, when it did start it ran rough until operating temp was reached. Check engine light came on, the only code is P0300, random miss fire. We had the truck over ni... Trouble codes: P0300
1997 GMC Jimmy SL 4.3L air bag VIN: 1GKDT13W2V
truck came in with air bag light on,scanned code 42 current code,performed tests has 31.3 volts per scanner info,test wiring no shorts or grounds to wiring,test says you need at least 32.5 volts on the wire,i am having a hard time believing that this has a wir...
2000 Oldsmobile Silhouette GL 3.4L cruise control VIN: 1GHDX03EIY
see repair history
2001 Other GM Navistar 4.5L Compressor Clutch VIN: 1HTMMAM82H
Is anybody familure with a International Navistar JERR-DAN flat bed wrecker, I have No compressor engagement, I have all blower speeds & mode controls system is full or refergent Does not have any voltage on any pressure switches either side of the switches. ...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L Temperature Blend Doors VIN: 1G4HR52L5S
Hello All, The customer has not yet returned the vehicle to me for further diagnosis. The three messages I received suggested looking at the door motor actuators and sensors, the A/C mode control, and the water temp. sensor (this car does not use one). As soon...
1998 Cadillac DeVille 4.6L blower motor VIN: 1G6KD54Y7W
Thanks for all of the replys. As most of you suggested it was the blower motor. Apparently when i orignally probed the grey signal wire i didnt pierce it all of the way through and thought i had an open circuit. After i rechecked it it had 4.5 volts which is w...
1993 Chevrolet S10 4.3L No Start, Cuts out, Stall VIN: 1GCCS19Z3P
HI TECHS Thanks for all the replys looks like the reman dist we installed had a problem either in pick up coil or magnet special thannks to those of you who nailed this on the head We had no reason to suspect new part should have known better it happens all to...
1996 Chevrolet Monte Carlo LS 3.1L poor power VIN: 2G1WW12M3T
we couldn't fix this car,most said that the cat converter was plugged,we checked back pressure only had 3 inches of pressure,some said o2 sensors,we had over 15 hours and 140 miles of driving,thanks for the help,will update if we get it back and figure it out
1998 GMC Jimmy Envoy 4.3L brake fluid VIN: 1GKDT13W1W
Thanks to all for the quick replies I received. Especially to Kirk [...] who pointed out an easy test found in this months issue of Brake and Front-end to find contanimation in brake fluid. This test is based on the fact that brake fluid is water soluble whi...
2002 GMC Sierra 2500 6.0L steering box VIN: TGTEK19TX2
We received replys from Harry,Bill,andTom all three had good input.The suggestions were possible noise from electronic valve on variable assist systems,aftermarket press.hose vibrating against the frame or body and a tsb for greasing the intermediate shaft aft...
1993 Oldsmobile Cutlass Supreme S 3.1L No Start VIN: 1G3WH54T7P
i received 5 replies on this. thanks to everyone for taking your time to respond. raymond put me on the right track. he reminded me of something i already knew, but had bypassed because of all the codes. seems my scanner didn't care for the car. anyway, he rem... Trouble codes: 13 (o2 circuit), 15 (ect circuit), 22 (tp low), 23 (iat low), 32 (egr circuit), 41 (cylinder selct error).
1994 Oldsmobile Achieva S 2.3L Hesitation, Stall VIN: 1G3NL1535R
We didn't fix this car- The customer was unwilling to try a computer or prom- She is kind of a do-it-yourselfer and she may try this on her own. Thanks for the replies and keep trying. Dan
1995 Oldsmobile Cutlass Supreme SL 3.1L Cooling Systems VIN: 1G3WH52M7S
Well new intake gaskets seemed to fix it.The car hasn't had any signs of oil consumption.And there isn't any in the radiator.Thanks to all that replied.
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