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Prev Professional Automotive Repair Technical Discussions for September 8, 2006
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Open Help Requests for GM
Help Request Answers
1990 Buick Century Limited 3.3L Excessive Emissions, No Start, Poor Idle Quality, Stall, Misfire, Poor Fuel Economy VIN: 3G4AL54N2L
Dies Black smoke.When cold this car will put out black smoke. It will then run okay for about 5 minutes in closed loop. It will then put out black smoke and eventually die even if you hold the throttle up on it. No codes. I swapped in known good PCM, MAF, an...
2000 Buick Regal LS 3.8L electrical system VIN: 2G4WB52K1Y
I have a friends 2000 Regal that was driven to the store, when returning to the vehicle no start condition, no crank. Symptoms were a clicking noise and all dash lamps, ie.. ABS, MIL, Low coolant, etc.. are flashing. Have looked at power and grounds from the b...
1993 Cadillac DeVille 4.9L Stall VIN: 1G6CD538P4
This car keeps dieing out going down the road. at decel mode or idling ,or at cruise.It seems to kill all power in car, but starts instantly. I changed distribitor, injectors,plugs, alternator,Ecm, and even ran a new ground to the new Ecm. Scanner veiws all lo...
1994 Cadillac Seville SLS 4.6L Poor Idle Quality, Surge VIN: 1G6KS52YXR
This car is very rough in overall condition. lack of love, so to speak. anyway, consumer is complaining of a rolling idle, unstable idle. it surges only in park or neutral. in gear, it's ok.. om my first attempt, i found the system running voltage was between ... Trouble codes: P0035, P0025, P0080 (ac delco replacement)
1996 Cadillac DeVille 4.6L crankcase vacuum VIN: 1G6KD52Y6T
we are getting 19 inches and climbing vacuum at cranckase vetalation hose from frnt valve cover to throttle body-this is tested on hose at throttle body side i should not have any ~- when we remove hose at throttle body there is vacuum in the crankcase??? it i... Trouble codes: P0138
2001 Cadillac DeVille DTS 4.6L drivers seat VIN: 1G6KF57991
Good day to all!! This cad has blown the 10 amp fuse for drivers seat & steering column module. with fuse blown the seat will move by memory, but not with manual controls . The dealer has replaced seat heaters a while ago. fuse has been replaced 3 times. with ...
1991 Chevrolet Camaro Z28 5.7L No Start, Stall VIN: 1G1FP2386M
I'll try to make this as short and sweet as possible. Customer was driving car & it dies. Tries to restart but it will only run for 2 seconds then die again. But before you tell me to check the vats system, read on. I went into the archives and found several g...
1994 Chevrolet K1500 Suburban 5.7L abs module VIN: 1GKFK16K2R
hi gang, Sorry, this is a very long post. I am at my witts end with this suburban. Vehicle initially came in for and intermittent low pedal. Verified and replace master cylinder six months ago for this problem. I looked at this vehicle over a year ago for an ...
1996 Chevrolet Impala SS 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy VIN: 1G1BL52P0T
This is my boss's car. When the car is cold the engine runs fine. Once it goes into closed loop #4 cylinder starts to miss driving bank 2 to correct rich due to the excessive o2 in the exhaust.Some of the the other cylinders start to miss on this bank after a ...
1997 Chevrolet K1500 Suburban 5.7L abs valve unit (below module) VIN: 3GNFK16R9V
Greetings: I am helping a firefighter with fixing his family transporter. I am in the process of replacing a valve unit due to leakage (located on the drs side inner fender under abs module). Waiting for the switch that broke due to swapping parts to be fed x...
2000 Chevrolet Silverado 1500 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK14V7Y
This truck came in with a long crank time hot and rough idle. I found the fuel pressure within specs but it drops off at about one lb. every few seconds when the key is shut off. The fuel pressure regulator was leaking from the vacuum port. I ordered a new reg... Trouble codes: P0230
2002 Chevrolet Silverado 3500 8.1L Hesitation, Misfire VIN: 1GCJC39G32
Hi everyone, thanks for taking the time to help me out. This truck is primarily used to tow RV's all over the country. This thing will exhibit a misfire under load at or above 3500 rpm. When this occurs, the motor makes a vibration noise similar to a heat shie... Trouble codes: P0300
2000 GMC Jimmy Diamond Edition 4.3L Breaks up VIN: 1GKDT13W5Y
After intake gasket repair. truck was skipping, we did fuel injection cleaning, seemed to straighten out. Customer took and brought back next day says couldn't go over 2500 rpm. we have hours into this and can't figure out. idles ok, as soon as you rev up to 2... Trouble codes: P0339, P0340
1999 Oldsmobile Intrigue GX 3.8L readyness VIN: 1G3WH52K4X
2004 customer brought car to dealer failed readyness egr evap and catalist, customer was informed car needed ecm and flash, customer had job done at my shop, drove car over 2000 miles in next weeks brought back to dealer no check engine light no codes still wo...
2001 Oldsmobile Intrigue GL 3.5L Surge, Cuts out, Stall VIN: 1G3WS52H81
this vehicle is a strange one. customer drops it off and says that it cuts of while driving. it also surges while all dash lights come on. it always restarts. cold or hot does not matter. test drive shows no stalling. although several times the speedometer d...
1998 Pontiac Sunfire SE 2.2L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 3G2JB1246W
Good Day, Folks! While idling in the shop and watching the scan tool data, the injector pulse width intermittantly will jump up to over 8ms, (from around 2.5ms @ normal idle) This occurs WITH NO CHANGE IN ALL OTHER DATA such as MAP, ECT, TPS etc. This naturall... Trouble codes: P0300 (random cyl misfire), P0171 (fuel system lean), P0172 (fuel system rich), P1133 (O2 insufficient switching)
2000 Pontiac Bonneville SE 3.8L Stall VIN: 1G2HX54K0Y
Hello, I would appreciate any help I can get with this car that got towed into are shop.The vechicle is a 2000 pontiac bonneville with 3.8 vin K engine.this is the non supercharged version.The problem with the vechicle is it starts and only runs for about two ... Trouble codes: P0101 (Mass or volume air flow A circuit range/Performance), P0121 (Throttle /Pedal position sensor/Switch A circuit range/performance problem)
2000 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K5Y
Hello everyone again. I pulled this vehicle in with a check engine light on. Scanned it and pulled a code PO332. (Knock sensor problem) I was told by the service writer that 1 sensor was changed a while ago. The other one was changed recently. I don't have the... Trouble codes: P0332
2001 Pontiac Grand Am SE 2.4L Starting VIN: 1G2NE52T31
car came into shop 12/05 with an occasional no start we checked fuel pressure was ok drove car for 2 days before we could get a no start.when this happened we had no injector pulse and no spark we decided to replace lock cylinder with passlock did relearn and ...
2001 Pontiac Grand Prix GT 3.8L Blower sppeds VIN: 1G2WP12K01
OK Fellow Techs need some consoltation on this. Car came in with blower speeds working when they feel like it.Confirmed the problem and also notiched I was loosing the driving lighs when this occured.I have checked the blower and all conections to both the res...

Fixes & Summaries for GM
Fix/Summary Answers
1982 Cadillac Cimarron 1.8L Poor Idle Quality, Stall VIN: 1G6AG69G6C
Thanks for the help, Standard does indeed still sell this base gasket. Kind of pricey, about $125.00 cost but at least you can get it. Our local parts supplier for Standard even had it in stock. The part number is EF-9.
1998 Cadillac Catera 3.0L timing belt VIN: W06VR52RRW
thanks for all the information. i did end up buying the install tool from snap-on. it is a baum tool and does all ecotec enginesalong with saab and saturn. the part # [...].
1987 Chevrolet Nova 1.6L Altrnator VIN: 1Y1SK5141H
Thanks guy's. My problem is fixed. Kent and Joshua gave me heads up on a possible bad alternator. Although it was new, It had defects. I had to wait a week on another because I wanted a dealer Item. Thanks again to all who replied. A new alternator and all is ...
1993 Chevrolet Lumina Euro 3.1L oil pump shaft VIN: 2G1WN54T8P
hi, i recieved various emails pertaining to overpressurization of system,improperly installed torque converter,and internal parts warped or not running true.disassembled valve body and pump no problems found.checked all internal components for proper installat...
1994 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Misfire VIN: 2G1FP22P1R
Thanks to the 'injector' guys. Went right by the obvious, car had 6 bad injectors. We replaced all 8 just to be sure.
1994 Chevrolet Cavalier Z24 3.1L no fuel pressure VIN: 1G1JF14T1R
found frayed wire to power suppy to pump.Thanks for all the help.some of the suggestions led to the fix.Thanks again
1998 Chevrolet K3500 Cheyenne 5.7L Misfire VIN: 1GCHK34R9W
this 1 is fixed it was a bent exhaust valve on that cylinder and also head gasket looked like it was just about to or was slightly leaking between cyls 3&5 it had no overheating problems but i think it would have real soon.thanks again for the help iatn rocks!...
1999 Chevrolet C1500 Suburban 5.7L No Start, Poor Idle Quality, Stall, Misfire VIN: 3GNEC16R7X
Thanks, for all of the good intel that 16 members shared. The major problem with this intermittant problem was that we could NOT ever get the vehicle to fail while at our shop. The customer was very patient and we even went to his home several times to check t... Trouble codes: 1626 (theft enable signal lost).
2000 Chevrolet Silverado 1500 5.3L prestone in oil VIN: 2GCEK19T7Y
thanks to everybody for all the replies.It`s a great pleasure to see all the people working on this site. I removed the both heads and the cylinder head kasket was blown.
2002 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC524X2
I am going to call this case closed. Almost all responses were to relearn the theft deterent. I did try this yesterday just for fun and it did not help. The theft light was not on so I did not think this would help. With all other codes I had of loss of comuni... Trouble codes: U1000 (class 2 data malfuntion), U1064 (lost BCM communication), P1626 (theft deterent).
2003 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF52E73
Thanks Paul, Vince, Laneard, Kyle, John. This customer has had the car the past couple weeks so have not been able to try some of the suggestions. The car will be in today but I'm going to close this help request and update later. I did check for shorts in wir... Trouble codes: P0452.
2003 Chevrolet Tahoe LS 5.3L Mechanical VIN: 000000
Thanks for all the replies. It had a bent rod in block. Insurance ended up totaling the truck, cost of engine put it over value. Thanks again to everyone.
1990 Oldsmobile Cutlass Supreme 3.1L No Start, Stall VIN: 1G3WH54T3L
I got some good replies. Most all said something is shorted and pulling the voltage down. I cut the wires from the ECM to the MAP and TPS and volts was still low. I then disconnected the low coolant sensor in radiator and BINGO!! Voltage is at 5 volts. Even th...
1998 Oldsmobile Silhouette GS 3.4L srs VIN: 1GHDU03E3W
the cust did not bring the van back in most of the replies were to check the connector under the drivers seat if they bring the van back that will be the first place that we look. Thanks to all that responded.
1999 Oldsmobile Alero GL 3.4L power windows, fan inop, door locks VIN: 1G3NL52EXX
1994 Pontiac Bonneville SE 3.8L abs VIN: 1G2HX52LXR
Received 4 replies. Fuses checked out good. Customer decided to take car to dealer with Tech scanner. He will let me know what their diagnosis and results are. Thanks for all of your help, Abe
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