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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 19, 2005
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1986 Buick Electra Park Avenue 3.8L Battery VIN: 1G4CW69B9G
The battery on this Buick will go dead in about 2 hours (although sometimes it may take overnight). There is not enough amp draw when checking for a drain (less than 1 amp) yet battery goes dead fast. Battery has been checked and is okay (even installed a new ...
1989 Buick Regal Custom 2.8L No Start, Stall VIN: 2G4WB14WXK
When vehicle gets to full temp it will stall and stumble and when it stalls out it wll not resart .Check for spark and fuel after stall and both up to specs.
1997 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K0V
This car came to the shop from a car lot. Car would run fine till parked hot for 1/2 hour or so and then just crank but no start.wait 5 min and car would start and run fine.Test fuel pressure and it was falling off at rapid pace. From 44psi running to 0 w/ key...
2003 Buick Rendezvous CX 3.4L No Start, Stall VIN: 3G5DA03E73
This vehicle will loose power to the fuel pump and stall .I found the body connector located under the left rear door corroded and cleaned it and replaced one terminal . I have switched the relay with one in the distribution box labeled DRL that has the same p...
1995 Cadillac Seville SLS 4.6L Starting VIN: 1G6KS52Y8S
Starting disabled, due to thief system, wait 3 min to start after waiting 3 min still will not start cheched all fuses and all are good any ideas?
1984 Chevrolet G20 Beauville 5.0L Piston height VIN: 1GCEG25H6E
I am putting together a 350 motor for a project. I have an 010 block. Block excellect but had a spun rod bearing. Have a tired 305 out of this old van that has a good crank & rods. My memory & alldata say the 305 & 350 both use the same rods & crank. Differenc...
1986 Chevrolet Cavalier CS 2.0L Hesitation, Cuts out, Misfire VIN: 1G1JD69P8G
Car originally came in on hook... Died on highway no previous symptoms. Would not start. ECT read -30 degrees, oil ridden with gas, replaced ECT, changed oil, replaced plugs, started fine, misfire #1. Replaced cap, rotor and wires (all OE). Misfire gone, runs,...
1996 Chevrolet K1500 Cheyenne 5.7L power loss/boggs VIN: 2GCEK19RXT
Will not throttle up, boggs down like starving for fuel. Fuel changed. This happens underfull throttle mostly.
1997 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEC19R9V
i have been working on this car off and on for years. i know its history pretty well. has recently had engine replaced (we did work), complete tune-up, mass airflow, new converters, all 4 o2 sensors, tps replacement. not all were replaced to correct codes but ... Trouble codes: P0172 (bank 1 indicates rich), P0175 (bank 2 indicates rich), P0102 (mass airflow signal low)
1997 Chevrolet S10 4.3L convertor VIN: 1GCCS14X9V
customer is complaning that vehicle is idling to fast. i've tested iac, smoke machined intake no leakes. the problem after riding with him and having scanner hooked up the vehicle will take off pretty good even if you don't give it any gas. idle is 600 rpm's w...
1998 Chevrolet Express 3500 5.7L Stall, MIL Lamp on, Severe spark knock VIN: 1GBHG31R0W
This Van was toed in a few months ago, the engine was blown, we replace with a NEW engine. After we had a sever spark knock , and a stall. We got the codes out and got P1345 , so we did diagnostic, and found the desired timing was out of spec, we replaced the ... Trouble codes: P1345 (Crank/Cam Correlation Problemb)
1998 Chevrolet Cavalier 2.2L Cuts out, Misfire VIN: 3G1JC1241W
HI all in IATN land. Car came in with a complaint on a chop after driving 15 miles or so at 65 mph. Had been to several other shops prior to coming here. Fuel pressure and volume ok. Ignition ok but plugs were junk. Installed AC plugs, Flushed injectors, rebur...
2000 Chevrolet Silverado 2500 6.0L high trans. line pressure VIN: 1GCGK29U6Y
2000 Chevrolet Malibu 3.1L Electronic VIN: 1G1ND52J6Y
Hello all. Customer brought this car in complaining of a surge. when i road tested it, i could not get the car to surge, but it was not shifting properly (hesitating and delayed into 4th) with the scanner i could see that the trans range switch, trans fluid pr...
2001 Chevrolet Astro LS 4.3L windshield wipers VIN: 1GNEL19W71
Vehicle came in with complaint that the wipers come on when ever vehicle started or the right turn signal is activated. Upon verification I found the wipers staying on always. The switch would change speeds but not turn them off. I unplugged the fuse and they ...
2000 Pontiac Sunfire SE 2.2L idiot lights, fuel gauge and tach VIN: 1G2JB524XY
Hello fellow techs, I'm writing with the hope that someone has experienced what I am about to describe and may be able to save me some time and my customer some cash. This vehicle intermittently (10 minutes to 2 hours between occurences that last from a few ...
2001 Saturn L300 3.0L mil VIN: 1G8JW52R31
Howdy all, You see the previous history, obviously I didn't get it the first time. Symptoms now are MIL on, PCM code P1780 MIL requested by TCM, speedometer is working well, but I do have the harsh shifting which I suspect is vehicle in limp in. Here comes th...
2001 Saturn SC2 1.9L Hesitation, Stall, Misfire VIN: 1G8ZY12711
Vehicle has a hesitation just off idle when engine is warmed up and always seems to be at about 1200 RPM. Engine will die when accelerated in gear off idle. Does not occur on very light accelearation but always with moderate throttle movements. Owner installed... Trouble codes: P0341 (cam sensor), P0340 (cam sensor)

Fixes & Summaries for GM
Fix/Summary Answers
1998 Cadillac Catera 3.0L hvac blower VIN: W06VR52R7W
Well, The 'Caddy that Zigs' is fixed, sort of. Thanks for all the replies. Most thought that we had a bad blower module. I installed one and the problem was still occuring. Another sugestion was to see if this vehicle had an afterblow kit installed (for drying...
1989 Chevrolet Camaro Iroc-Z 5.0L Fast/erratic idle VIN: 1G1FP21FXK
Hello all, Thanks to all who replied. I just talked to the customer after they had driven the car for a week. The idle speed is working just fine thanks to the budget line NAPA tps sensor. We tried two delco units and both failed with-in an hour of installat... Trouble codes: 22 (tps), 36 (MAF burn off sol.).
1991 Chevrolet Lumina 3.1L speedometer VIN: 2G1WL54T6M
I would like to thank all the techs that answered my problem. It seems that the customers son was installing a remote starting system and cut into some wiring under the dash and shorted the wiring going to the speedometer. I pulled the dash and replaced the ha...
1993 Chevrolet S10 Blazer Tahoe 4.3L Hesitation, Surge, Cuts out VIN: 1GNCS13W6P
hello all! sorry i did not get back to you sooner. well thanks for all the replys! a few of you mentioned the injection harnes going through the intake man. well i ohmed it out while wiggeling it and it seemed ok. terms where ok. but i decided to replace it an...
1993 Chevrolet Astro 4.3L Shift Interlock VIN: 1GCDM19Z0P
Thanks for all the great replies and ideas. Solonoid was bad. Installed new one and all is fine.
1995 Chevrolet K1500 5.7L transmission VIN: 2G39S5WK6F
when we road tested the vehicle the scan data for the 4x4 showed that it was in a low setting so we proceded to check the switch on the transfer case and found it at fault. after replacement of a new switch we road tested the vehicle and the shift points where...
1997 Chevrolet Lumina 3.1L Camshaft Bearings VIN: 2G1WL52M3V
Thanks for the great advice. I replaced the block per recomondations. Purchased complet core motor for 35!!! dollars, needed the crank polished and cyls honed and line honed(spun main). Total cost on rering with new bearings and fresh crank will only be about ...
1997 Chevrolet K2500 Suburban LS 7.4L MIL Lamp on VIN: 3GNGK26J6V
Hi Group. thanks for all responds. special thanks to Roger from Alberta. he wrote. install a vaccum guage on the dip stick tube and remove the pcv valve and plug the hole for the pcv valve on valve cover and check for vaccum there shouldn't be any.if there is ... Trouble codes: P0507.
1998 Chevrolet C1500 Cheyenne 5.7L engine cuts off with brakes applied or right turn VIN: 2GCEC19R0W
i wouild like to thank everyone that replied with with their knowledge espically steve from ohio, dale from kansas and tim from missouri. you guys nailed it right on the money. the wire harness that goes between the bracket and frame was pinching the wire harn...
1998 Chevrolet K1500 Cheyenne 5.7L Dome Lamps VIN: 2GCEK19R4W
Installed both door switches. Waiting for customer reply to see if problem is fixed.
2001 Chevrolet Camaro 3.8L Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K31
finally figured out the misfire at high rpm. the catalytic converter was the problem it would let enough flow for normal driving but at wot would cause a misfire and spark knock. thanks to all Trouble codes: P0300.
2001 Chevrolet Impala 3.8L cooling fan VIN: 2G1WF55K61
hey guys thanks for the help it was the cooling fan i checked the resistance and it was not as specified.
1999 GMC Sierra 1500 SL 4.8L ac clutch VIN: 1GTEC14V9X
Thanks for all the help, no fix on this one. When we got it back the noise was gone. We recharged the system to verify correct amount of refrigerant and pressures were normal, gave the truck back and are in the wait and see mode now. We got several responses: ...
1990 Oldsmobile Silhouette 3.1L Cuts out VIN: 1GHCU06D9L
Most of the replies centered on a camshaft or valvetrain problem. We had already covered the simple things that everyone mentioned, and the customer pulled the plug rather than digging deeper. Thanks to all who took the time to reply.
1993 Oldsmobile Cutlass Supreme 3.4L Timing Belt VIN: 1G3WT31X5P
Replaced timing belt automatic tensioner with OE part, and all is well. There is still a bit of noise but is very liveable. Thanks to all of the suggestions guys.
2000 Oldsmobile Intrigue GL 3.5L cooling system VIN: 1G4W12TE45
Thanks to all who responded. After rechecking for bad head gaskets under a higher load on the engine combustion finally showed up. At lighter loads it would pass the test.
1981 Pontiac Firebird Trans Am 4.9L Unknown VIN: 1G2AW87W3B
Thanks so much to those who sent me what I needed. This one would have bee. very difficult without the diagrram that was sent to me. The short was at a wire pinched in a bell housing bolt thaty was hard to see. There is a groung there and this wire was pinched...
1995 Pontiac Bonneville SE 3.8L battery VIN: 1G2HX52K7S
we continued to trace the problem down and found a shorted power wire under the rear seat molding that goes to the power antenna. we repaired the short and the draw stopped.
1995 Pontiac Bonneville SSE 3.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G2HZ5218S
This one is fixed. I spent quite a bit of time on this so I will shorten all the testing that was done. I found the reluctors on the harmonic balancer loose. This was causing the signal from the crankshaft position sensors to look like an engine back fire in w... Trouble codes: P0341.
2000 Pontiac Montana 3.4L MIL Lamp on VIN: 1GMDXU3E2Y
hey thanks for all the replies and help i found that a reflash update was available and solved the problem Trouble codes: P0401 (insufficient egr flow).
1994 Saturn SW1 1.9L No Start VIN: 1G8ZG8597R
Due to the fact that that the problem is too intermittant to diagnose, I must close this thread. Here are some of your suggestions, which I greatly appreciate. 1)ECM needs 6x AND 7x signals to fire the injector. 2)CKP sensors sometimes go bad after 'hot soak'....
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