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Prev Professional Automotive Repair Technical Discussions for May 13, 2013
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1997 Cadillac DeVille Concours 4.6L high idle VIN: 1G6KF5295V
High idle. TPS jumping around a good 1/10 volt (at idle or engine off) I assume this is what is causing the problem. Using a Tech2 the at idle reading bounces from yes to no constantly. I cannot even do a IAC control because it says its not at idle, unless i u...
1999 Cadillac Seville STS 4.6L climate control VIN: 1G6KY5497X
Car came in a month ago, had low refrigerant level. Filled system and passenger side was cold and drivers side a bit warmer. Checked the air mix door on the drivers side and even with assistance would not get as cold as the passenger side. Advised the customer...
1997 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall VIN: 1G1YY22G4V
Greetings to all you brilliant folks in automotive repair world. I have officially lost enough hair and brain cells on this vehicle. Car came to me and would not run unless you held the gas pedal almost to the floor and then it would billow black smoke and die...
1998 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNFK16R1W
The customer complaint is that it has a miss/hesitation at idle and light acceleration, the problem started after he went threw the automatic car wash, it straigtened out later in the day then the next morning it started with the miss again and has been there ... Trouble codes: P0102, P0300, P0404, P0405, P0463, P1404
2001 Chevrolet Tracker 2.0L Hesitation, Cuts out, Misfire VIN: 2CNBJ13C31
Found 2-4 plugs submerged in oil, autoliite plugs work out books soaked. Recommended tune up. customer approve plugs boots and vc cover. Changed them and installed oe recommended plugs(iridium noted as OE) Now it has intermittent drop out on current ramp, rand...
2003 Chevrolet Malibu 3.1L Misfire VIN: 1G1ND52J83
Hi everyone thanks for checking out my post, and for any help that you can offer. This vehicle comes from another shop with a p0300 after installing a used engine. They replaced plugs, wires, and ignition coils. We replaced ignition module as well. the misfire... Trouble codes: P0300
2004 Chevrolet SSR 5.3L HVAC case VIN: 1GCES14P44
fresh air actuator is popping., so it most likely needs the actuaotor, or door. i skinned the dash, removed the plastic instrument carrier. for the life of me, even after removing all subframe bolts, i still can not even wiggle the metal sub-frame to pull out ...
2004 Chevrolet Silverado 2500 6.0L Misfire VIN: 1GCHK29U54
This truck misfires on cylinder #1 at idle only, hot or cold. Cylinder #8 has less 1/10 the misfire counts. Freeze frame shows DTC set at idle too. I pulled the spark plugs because the customer said they had been changed, he thought with Split-Fire plugs but t... Trouble codes: P0300 (Random Cylinder Misfire Detected 1-40595 8-3015 all others 200), P0654 (Eng Spd Output Ckt Problem - Code is due to Inst. Clust. out for repair)
2006 Chevrolet Malibu LT 3.5L fuel, power windows VIN: 1G1ZT51856
the vehicle has an intermittent no start problem, no codes, no theft light flash. you can go to rear fuse panel and tap on relay the car will start right up. It is very hard to duplicate the problem. I have tested fuel pressure it tested at 62 psi. have teste...
2006 Chevrolet Silverado 3500 LT 6.6L Unknown VIN: 1GCJK33D36
Hi guys I just got done replacing headgaskets in this truck and when I went to do the A/C service because I had to remove the compressor I couldn't get it to take a charge. The compressor would not come on. I could manually energize the clutch and make it come...
2008 Chevrolet Silverado 2500 HD WT 6.0L range VIN: 1GCHK29K18
Is there a recalibration for back up sensor module and if so how do you do it.
2009 Chevrolet Malibu LS 2.4L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G1ZG57B79
replaced both actuators cleared codes and test drove. symptoms persist but no codes returned within 12 drive cycles. checked cat for blockage all seemed ok. please help!!! this thing is throwing me for a loop and the customer is from out of town in our waiting... Trouble codes: P0011, P0013, P0014, P0101, P0300, P0420
2010 Chevrolet Traverse LT 3.6L complete interior VIN: 1GNLVGED5A
A few weeks ago our company sent an employee to Fresno to pick up fresh fish for the Ahwahnee Hotel dining room. On the way back to Yosemite the fish spilled. I don't know why they didn't have it in an ice chest. Anyway, the whole vehicle now smells inside. We...
1999 GMC W4500 Forward W4S042 5.7L No Start VIN: 4KDC4B1R3X
This truck was towed to the shop for no start, or at times very extended crank to start. When it arrived I checked for fuel pressure and spark. Also noted that the starter had a bad spot in it and would kick out while starting, so I replaced that before going ...
2005 Pontiac G6 GT 3.5L steering VIN: 1G2ZH52855
this vehicle has an intermittent pull to the left after a hard left turn or sometimes potholes, maybe, checked suspension and alignment, cant seem to find a problem with either alignment or suspension but pull defenetly there at times especially after hard lef...
2008 Saturn Astra XR 1.8L MIL Lamp on VIN: W08AT27178
This vehicle came in a few weeks ago with a ck. engine light and a abs light on. Found bad LF speed signal. Watched speeds on Modis and all read except LF. Replaced LF hub bearing assy. Now we are trying for emissions inspection and code B1232 keeps coming up ... Trouble codes: B1232 (Cannot find defination)

Fixes & Summaries for GM
Fix/Summary Answers
2005 Chevrolet Colorado Z85 LS 2.8L Starter VIN: 1GCDT19875
sorry for the late closing - dealer installed a new PCM and reflash - relearn security passlock and all is well - thanks for all the help
2002 GMC Envoy SLE 4.2L Misfire VIN: 1GKDT13SX2
We have experienced a day of heavy rain and the customer had massive issues with misfires in wet conditions(which of course they never tell you).I hosed the truck down and every cylinder misfired.Replaced all the coils and no further issue.Thanks for all the r... Trouble codes: P0302 (Cylinder 2 misfire).
2006 GMC Envoy SLT 4.2L mode doors VIN: 1GKDT13S46
sorry it took so long guys been sick after long look at envoy all test were good blend door motor was clock ok took out heater box found bobby pins stuck in door that is way it went to floor but to center thanks again.
2007 Pontiac G6 3.5L Hesitation VIN: 1G2ZG58N37
I determined that engine had internal noise triggering knock sensors to pull back timing. Did not show up until warmed up good. Customer is going to save up funds for an engine. Thanks for all the help and suggestions. Mike
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