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Prev Professional Automotive Repair Technical Discussions for June 7, 2007
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Open Help Requests for GM
Help Request Answers
1990 Chevrolet Blazer Scottsdale 5.7L No Start, MIL Lamp on VIN: 1GNEV18K71
started out truck would start then stall several times in the morning. once running it would run all day. Now it is worse it just starts then stalls. it has a replacement distributor and new fuel pump relay. I have a good idea what it is but want some chevy gu...
1991 Chevrolet Beretta 2.2L Poor Fuel Economy VIN: 1G1LV13G1M
ecm not responisve replaced ecm still idles hi when hot
1995 Chevrolet Pickup C2500 7.4L Hesitation, Surge, Cuts out
after running engine at normal temp. cruising at 45mph and above engine will start bucking,cuts out looses power and feels like running on 4 cyl. long term fuel trim will go down to 86 and short term at 128, and o2 sensor stays or toggles 489mV to 56omV. tps r...
1997 Chevrolet Blazer 4.3L ABS system VIN: 1GKDT13W1V
Hello, I'm hoping for some help with this vehicle. The customer came in complaining of ABS light coming on intermittently and brake pedal going to floor during stops and the brakes not working. We scanned vehicle and found following codes: 26 Left front speed...
1998 Chevrolet S10 LS 4.3L won't slow down VIN: 1GCCS19X6W
Vehicle came in for a problem when you let off the gas the idle was staying up & it would not slow down around 30-40 mph,so changed the IAC ,cleaned the throttle body also checked for vacuum leaks (none found)cleaned EGR all working as it should,also reset the...
1999 Chevrolet K1500 Suburban 5.7L No Start, Stall VIN: 1GNFK16R7X
I have this 99 chevy sub that after a hot soak will just start and die. I cant keep it running, it almost seems like there is a fault with the security system but there is'nt any codes. fuel pressure does'nt drop when it acts up and also will hold constant for...
1999 Chevrolet K1500 LS 5.7L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GCEK19R5X
The last thing I changed was to two injectors cause #8 & 4 were not spray good but it seem to get worse . Trouble codes: P0300 (Radom misfire)
1999 Chevrolet Blazer 4.3L Transfer case VIN: 1GNDT13W6X
After replacing Transfer case module and Encoder I could commucate and receive data. Turn key on and you could her shift motor cycling like it was trying to find the right postion,after a few times all the lights for shift control would go off and service 4 WD...
2000 Chevrolet Camaro 5.7L Poor Fuel Economy,
hello,everyone.this is more of a tuner question.did some work on this 'ss' customer wants to install a super charger.i have done some mods but no charger.i believe that slap it in and turn key is not going to happen.but that is why i am asking help ...
2002 Oldsmobile Bravada 4.2L rear differetial VIN: 1GHDT13S62
this vehcile makes a ticking sound at about 30 mph in sweeping left turn,brakes are new and rotors are new,no excessive movement in axle bearing and seal is not leaking.i will tell you about another issue and that is at low speeds (under 10 mph)it feels like i...
1997 Pontiac Firebird Formula 5.7L destroys ignition VIN: 2G2FV32P6V
We originally replaced the cap and rotor do to exact same failure, we put about 15 miles on vehicle prior to customer picking up car (fun test drive), he drove it about another 20 miles before it died, vehicle was towed back to shop, we went through the tear d...
1999 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5280X
vehicle came in about 1 month ago runnig very rough and a luandry list dtcs. tuned it and replaced icm and ckp up and cleared the multiple codes for cylinder missfires and she ran beutifull. customer returned today with the mil on i pulled the code p0304 cylin... Trouble codes: P0304 (cylinder 4 missfire)

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille 4.9L Stall, BLOWN FUEL PUMP FUSE VIN: 1G6KD52B5R
removed fuel pump module and found grey wire in module melted, connector was melted to module housing. this pump wouldnt fail until hot. weve had mild temps past couple days. this is why i couldnt duplicate concern. replaced pump. this took care of condern. th... Trouble codes: P0020, P0085.
1997 Cadillac DeVille Concours 4.6L Misfire VIN: 1G6KF5490V
the customer took the car to the dealer and has yet to get back to me with what they found out, i will post just as soon as i know, thanks again Trouble codes: P0302.
1971 Chevrolet monte carlo 5.7L third member VIN: 312B52664G
thank you to all who replied, I checked out every web site and called every shop that was suggested. I had good results and I saved them for future reference. I ended up with a set of 4.56 gears and aburn posi that I found on ebay during memorial day weekend. ...
1997 Chevrolet Blazer 4.3L gears VIN: 1GNDT13W6V
sorry about the late fix report just wanted to know if it really fixed it . waited for the customer to call back . found the acutator return spring was weak and a shim that was worn . thanks for all your tech help .
1997 Chevrolet Astro 4.3L Poor Idle Quality, Surge, Misfire VIN: 1GNEL19W8V
tahnks for all the responses. many thoughtful replies, fuel pressure, carbon-stuck egr valves, worn distributor/cracked distributor magnets, and faulty maf sensor were the most common suspects among the replies.i was able to rule out egr by scanning egr% on sc...
1997 Chevrolet K2500 Cheyenne 7.4L Poor Idle Quality, Misfire VIN: 1GCGK29J6V
Well I sure put the cart in front of the horse on this one! I must apologize fellas, but I found a bad spark plug. After scoping the ignition system, I found a dead hole(#3). Bad plug. I still don't understand why it didn't log a misfire code for that cylinder...
1998 Chevrolet K1500 Cheyenne 5.0L Cuts out, Misfire, MIL Lamp on VIN: 1GCEK14MXW
I had several replies to set cam synch. I had already done that with no help. I had other replies to perform tune-up to no avail. Someone said check for miss-fires: there were never any showing due to loss of crank signal. One thing I did notice is that when t... Trouble codes: P0339, P0341.
2005 Pontiac Vibe 1.8L compressor VIN: 5Y2SL63845
You guys were right. My thermometer was not accurate. I was using a raytec infared thermometer. I used my Fluke themocouple and checked the temperature and it indicated [...] Farenhiet. It really seemed that the air was colder than that to feel it. Anyway,...
1997 Saturn SL1 1.9L Cooling Systems VIN: 1G8ZH78YOR
Everyone was right. Warranty per Saturn headquarters was 7years/[...] Thanks Mike
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