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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 22, 2006
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Open Help Requests for GM
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1992 Buick Park Avenue 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4CW53L1N
Thank you for reading this post. Vehicle came to me upon recomondation from another client after he been to other shops. Engine races at 2800rpm most of the time and will stall sometimes. I checked for vacuum leaks and found none,including plugging the vacuum ... Trouble codes: 43 (knock sensor est)
1993 Cadillac Eldorado Sport 4.6L Surge VIN: 1G6EL12Y4P
Hello fine techs: This El dorado came as a no-start. We found wires from crank sensors were inverted at ign. module. We repaired them and car now starts but idle is always surging between 800 and 1500 rpms. We tested for vacuum leaks with smoke machine and no... Trouble codes: P0030
1997 Cadillac Catera 3.0L cooling fan VIN: W06VR52R9W
hi i need some help this car came in the shop customer complain that car temp guage red line check all fuse and relay found cooling fan fuse blowen change it with 15 amp fuse run car for a while car was ok so i give car back to customer car came back two weeks...
1988 Chevrolet Beretta GT 2.8L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Stall VIN: 1G1LV11W0J
Hello techs.. I have a problem here. 1988 Chevy Beretta came in and would not start.. After cranking a while we could get it to start and noticed that all PID's were off the wall. Every thing was wrong showing numbers that did not make sense at all. We replace...
1988 Chevrolet S10 2.5L No Start, floods VIN: 1GCBS14EXJ
I have a 1988 S-10 with a 2.5 4 cyl. TBI, the customer said the truck had a very high idle. Hooked up the scanner and only code in it was 32 for EGR, the truck did idle about 1500 rpm. I noticed that temp sensor was reading 88 F. and would fluctuate back to 86... Trouble codes: 32 (egr)
1989 Chevrolet S10 4.3L Hesitation VIN: 1GCCS14Z9K
I need to know where I can find the spring for the fuel pressure regulator. It's not in a rebuild kit, or a regulator kit. Mr Dealer says it's not available seperately, gotta buy the whole thing. Can't find a aftermarket. The closest is NAPA has a pictorial bo...
1994 Chevrolet S10 Blazer Tahoe 4.3L Poor Idle Quality, Surge VIN: 1GNDT13W2R
Guys I need some help with this one,Cust came from another shop that replaced injector assy twice now truck has unstable idle,have r&r upper intake and checked for leaks none found dist has checked good, have tried new map sensor,coolant and air temp sensors a...
1994 Chevrolet K1500 5.7L heater core VIN: 2GCEK19K6R
Thank you beforehand for your responces.The shop has replaced the heatercore 3 times.The last core lasted a month.Coustomer did not observe overheating on gauge.
1995 Chevrolet Blazer 4.3L Poor Idle Quality, MIL Lamp on, HARD BRAKE PEDAL VIN: 1GNCS13W4S
1996 Chevrolet Caprice Classic 5.7L MIL Lamp on VIN: 1G1B152P6T
Have followed diagnostic procedures flow chart with out any luck. Crank sensor was replaced and connections ck. Trouble codes: P0336
1996 Chevrolet S10 2.2L Thermostat VIN: 1GCC1944T8
Thermostat makes a popping noise. Replaced thermostat with OEM, still has noise unless we remove the thermostat. Popping noise is like someone is hitting the thermostat housing with a wrench. Has a new headgasket and water pump. Does not run hot or overheat. ...
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1942V
This is for a friend @ another shop I believe we have a computor or crank reluctor problem butttttttt.Here we go first after he brought the truck up today to see what my scan tool showed on the missfires it does the same which is if if you disconnect injector ... Trouble codes: P0300
1998 Chevrolet Camaro 3.8L No Start, Stall VIN: 2G1FP22K5W
This is an intermitent problem. This car will stall and won't start while driving or slow accerlation. The first time this happend I found the vehicle had no spark so I changed the ignition module. The vehicle ran without problems for about three weeks. On 8/2...
2002 Chevrolet Astro LS 4.3L blower motor and headlights VIN: 1GNEL19X82
Customers main complaint was that the blower motor and headlights would come on when they wanted and would kill the battery.We go the vehicle to act up for awhile when we were testing. The headlights would still come on with headlight switch disconnected. Upon...
2002 Chevrolet Silverado 1500 5.3L Engine Knock VIN: 2GCEK19TX2
Truck has a intermintent engine knock, sounds like a rod knock and is very clear,It only comes in at start up and the truck has to have sat long enough to cool down. Oil Changes are in order and frequent for the life of the truck. Yesterday the vehicle did kno...
2003 Chevrolet Tahoe LS 5.3L Mechanical VIN: 000000
I have a 2003 Tahoe that was involved in a rollover onto it's driver's side. The vehicle runs but smokes out the tailpipe BIG TIME. It also has a knocking noise, doesn't have the deep tone that is usually associated with a bad rod. I pulled the plugs and they ...
2004 Chevrolet C4500 Kodiak C4V042 6.6L warning lights VIN: 1GBE4V1174
there is a warning light in the center of the dash that intermittenly comes on along with a warning bell that sounds . the light has a picture of a wrench along with brakes and the word brakes underit . whatis this light & does it need to be reset. thanks in a...
2003 GMC Savana 2500 4.8L No Start VIN: 1GDGG31V73
Veh. towed in for no start. Checked fuel pressur, @60 p.s.i. required specs. are @50-62 p.s.i. Veh. has spark, injector pulse and un-resricted exhaust. Spark plugs are extremly wet with fuel. Switched p.c.m. with known good one. No help. Need help now running ... Trouble codes: P1626 (theft deterent system activated)
2004 GMC Sierra 1500 SLE 5.3L brake pedal VIN: 2GTEK19T14
customer drives hard with medium loads. pedal goes too low from hiway cruise stops. almost to floor. we can pinch brake hoses to get firm/high pedal (engine running). we have isolated to l/f caliper. pinch this hose and pedal is high and firm. after bleeding p...
1989 Oldsmobile Cutlass Supreme International 3.1L burning spark plugs VIN: 1G3WR14T2K
this car gets rode hard, lots of miles, has been running great then last winter came in with a spark plug blown out of #1 cyl. weird but we repaired the hole and put in a helicoil. couple months later came in with the center porcelain blown right out of the ne...
1998 Oldsmobile Silhouette Premiere 3.4L MIL Lamp on VIN: 1GHDX03E0W
I am kind of at a loss here.It keeps throwing p0401 code on first test drive after clearing code.Alldata isnt helping much.I can command up the egr and see the map sensor voltage and pressure go up.So I am not sure what else I need to look at that is making it... Trouble codes: P0401
1987 Pontiac Grand Am 2.5L No Start VIN: 1G2NE14U2L
Something wierd is going on with this Pontiac. It is a crank, no start. It is getting fuel at the throttle body, but it has no spark. It has the listed codes, but when monitoring the codes an entire different list of codes pops up intermittently. (they are 25,... Trouble codes: 23 (MAT too low), 22 (TPS too low), 21 (TPS too high), 15 (ECT High or open), 13 (Oxygen sensor circuit open short or bad)
1997 Pontiac Trans Sport 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GMDU06E8V
this van will show missfire cnts for all cylinders intermitantly.ranging 2-6 cnts. It does it idling in park or neutral.If you drop it in gear or turn a/c on it quits showing miss firing and the motor is smooth.Doesn't do anything driving. they have put plugs ... Trouble codes: P0300
1999 Pontiac Grand Am SE 3.4L fuel gauge VIN: 1G2NE52E1X
I need help on this one, has been to three other shops. And no one has been able to fix the problem. The fuel gauge reads fine when you have afull tank, But when it gets to 3/4 s it stops working. ITs had a new cluster, fuel pump, and sending unit,body control...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Roadmaster Estate Wagon Collector's Edition 5.7L MIL Lamp on VIN: 1G4BR82P5T
Thanks for all the help guys. Been waiting for cust. to come back,but he has not so must be fixed.I installede another purge flow vavle and blew out lines and drove car,car has had fot 3-4 weeks and no complaint,they never call when its right so I'll asume i... Trouble codes: P1441 (Flow during non purge).
1984 Chevrolet Corvette 5.7L wipers VIN: 1G1AY0781E
Thanks for the offers of help. The fix for this vehicle is to modify the wiring harness with jumper harness that only comes with the motor if you order it from the dealer. I talked extensively with acdelco concerning this. The part from delco used to come with...
1997 GMC Savana 1500 5.7L Poor Fuel Economy, MIL Lamp on VIN: 1GDFG15R4V
well the customer finally came back in with the van to be rechecked and I went ahead and tried a mass air flow , no change in the reading of 8 gms at idle .so after changing the pcm fuel trims came back to normal, all is good . thank you all who replied you ma... Trouble codes: P0172, P0175.
1995 Oldsmobile Cutlass Ciera 3.1L Misfire VIN: 1G3AJ55M95
Thanks to all of you who replied. I replaced the fuel rail and drove it for a couple of days, the customer has had it for four or five days. The fuel must have had something in it that reacted with the aluminum rail
1996 Oldsmobile LSS 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G3HY52K6T
We found out the customer recently replaced only the upper plenum gasket and not the lower gasket. I might be the cause of the problem because the engine stumbles when it the temp guage reaches about 220 degrees. Temp guage will not go past 220 degrees. custom...
1999 Oldsmobile 88 Royale 3.8L Interior Lights VIN: 1G3HN52KXX
Thank you for your help, it solved the problem. This is my first experience and this site is unbelievable! The vehicle is equipped with sensors that monitor the door handle movement (and sensors that monitor the doors). We cut the input wire to the BCM for the...
1993 Saturn SC2 1.9L cooling system VIN: 1EWC232123
Fixed! initailly before posted I replaced ECT with a OE updated one because ohm test showed underestimate. The updated sensor has a brass probe instead of plastic, which leaks over time. The problem for me was my soulas scanner instead of having an engine temp...
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