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Prev Professional Automotive Repair Technical Discussions for May 1, 2014
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Open Help Requests for All Makes and Models
Help Request Answers
2004 Acura RSX Type-S 2.0L Right Front Window VIN: JH4DC53094
Right front window will only go down. Check power and ground at the window switch; good. Using a test light at the window switch side connector going to the motor; the test light lights up with the switch up and down position. At this point, power and ground i...
2009 Audi A4 Quattro 2.0L Poor Idle Quality, Misfire VIN: WAULF78K39
we have this a4 that came in with a rough idle. drove the car and while moving the car has sufficient pick up/power. when at a stop the engine misfires. the dealer had checked mechanical timing of crank to cam and of cam to cam. tried a cam sensor and found no... Trouble codes: P0300, P0160
2010 Audi A4 Quattro 2.0L Oil Pressure VIN: WAUBFAFL0A
We have low oil pressure after we did a rebuilt cylinder head due to a burnt valve
2005 BMW 645Ci 4.4L vacume booster VIN: WBAEK73465
we replaced the vac. pump due to oil leak and the hose w/check valves, and the booster assem. the booster is ( aftermarket ). I'm getting 20 inch. of vacume from pump but after 2nd pump on brakes the pedal will get real hard like no vacume. Tried a second boos...
2008 BMW 535xi 3.0L Misfire VIN: WBANV93588
This BMW is driving me insane. Twin turbo, direct injected inline 6. It came in for a check engine light and misfire under light load. It originally had misfire codes for both cylinders 1 and 5. After clearing the codes only the cylinder 5 misfire code returne... Trouble codes: P0305 (Misfire Cylinder 5), 29D1
2008 BMW 535i 3.0L Noise VIN: WBANW13558
This BMW is making a noise when braking. Kind of a Zzzzzzrrrrr that gets lower in pitch as you slow down. I originally looked at the car and told the owner that it was the front tires. The front tires are worn a little unevenly so that they have feathering/sca...
2008 BMW 328i 3.0L modules VIN: WBAVC53588
I was codding the steering angle sensor using ista p when the battery charger went dead the session was terminated due to battery voltage too now everything is dead like there is no battery .has anyone of you heard about shorting obd2 connector to retri...
2006 Buick Rendezvous CXL 3.6L #2 cyl misfire VIN: 3G5DA03796
Only code I get is for EVAP vent P0449 need to drop tank to repair. The problem started last year but quit when we went north for 6 months, started back up in Feb when we came back to FL, the car bucks between 45 and 60 mph (1400 to 1800 rpm's) in OD only goin...
1994 Chevrolet Camaro Z28 5.7L Starter VIN: 2G1FP22P5R
Customer brought me the car and said the starter would just click and he would cycle the key untill it started,so he supplied his own used starter and I replaced it. Called me later that day and says it was the same so then he brought a new starter, again I in...
1994 Chevrolet K1500 Cheyenne 5.7L No Start, Poor Idle Quality, Surge, Stall, Misfire VIN: 1GCEK14K5R
Thank you for reading my post and taking time out of your day to help me out. This truck looks to be well taken care of but it came in because when it was started cold, all was good but as soon as it reached operating temp, it would not idle in gear. It would ... Trouble codes: 21 (Tps out of range), 23, 25 (Iat sensor out of range low-high), 44 (Oxygen sensor system lean), 33 (Map sensor out of range), 41 (Ignition control circuit), 42 (Bypass circuit fault)
1999 Chevrolet K2500 7.4L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, Poor Fuel Economy VIN: 1GCGK24J9X
Crank NO Start. Found Ignition Module not sending signal to coil. Replaced Ignotion Module and now it would start and run. Customer Requested tune up. Cylinder 8 misfire Cylinder 4 misfire still. All 02 800-900mv puffing black smoke and during snap throttle bl...
2007 Chevrolet Suburban 1500 Z71 5.3L Misfire VIN: 3GNFK163X7
All this customer was complaining about was the Check Stabilitrack light was on. No mention of the flashing check engine light or the oil level low light being on. My Tech 2 shows a misfire on cylinder # 4 with a few misfires on cylinder #3. I decided to cha... Trouble codes: P0300 (Misfire Detected)
2001 Chrysler Sebring LXi 2.7L No Start VIN: 1C3EL55U91
This engine is the devil. We received this car not running. Customer had serviced the headgaskets himself, and mistimed the engine, bending valves. We removed heads, sent to machine shop for 6 new valves, valve job, resurface the awful belt sanded finish. Also...
2007 Dodge Ram 3500 ST 6.7L MIL Lamp on VIN: 3D7MX38A07
Code P2A01(O2 sensor 1/2 circuit performance) keeps returning after about 300km. Replaced both O2 sensors a year ago per TSB for code P2A01. Was good for about 9 months and now code has returned. Tested both O2 sensor heaters(good-3.4 ohms)Both have heater pow... Trouble codes: P2A01
2008 Dodge Caliber SXT 2.0L noisy VIN: 1B3HB48B88
I have never worked on one of these CVT trans. Owner said she just noticed a noise that was new .It sounds like a bearing wine or carrier noise. I have read that you don,t repair these you just replace them. Would some one with expertise shed some light on thi...
2010 Dodge Charger R/T 5.7L Cuts out, Stall, Misfire VIN: 2B3AA4CTXA
This squad car has had recurring p0462 for years despite replacement of suspect sensors and one failed pump. The issue with it is that recently it would run great, then miss like crazy, stall and may or may not restart. The symptom is so random that we've only... Trouble codes: P0300, P0462
1987 Ford F-150 Custom 5.0L No Start, Stall VIN: 1FTCF15N0H
Engine will stall,wont restart or wont start sometimes-has fuel pressure when problem occurs-Here is my question:it will run as long as the key is in the start position-shuts off when you let off the key-I know I've seen this before but cant remember the fix-d... Trouble codes: 21 (Ect out of range), 18 (No tach), 25, KN0CK, SENS0
1992 Ford F-350 XLT Lariat 7.3L converter VIN: 1FUYGFVBK8
i rebuilt transmission for slipping.after install stalls when put in reverse and hunts between 2nd and third at steady speeds.recently replaced vss and replaced converter during rebuild.not sure what to do next
2006 GMC Yukon XL 1500 SLE 5.3L Steering angle VIN: 1GKFK16Z06
Hi I have this Yukon that has 2 codes in it C0472 and c0473. High and low voltage. The service stability message comes on. I looked at the voltage on the scanner and it changes when I turn the wheel. Not real familiar with this system. Any help would be greatl...
2007 GMC Savana 2500 4.8L Misfire VIN: 1GTGG25V87
We recieved vehicle from customer with misfire. We see mis fire on cyl 7 and cyl 8. It occurs under slight load at aprox 1300 to 1500 Rpm in park and can also be felt driving down the road. We have checked coils and swapped them with known good cylinders. We h... Trouble codes: P0171, P0174, P0300 (Random Misfire)
2003 Honda Pilot EX 3.5L Misfire VIN: 2HKYF185X3
I cannot get rid of this vehicles misfire. New plugs and coils when vehicle came in initially misfiring, was gone a few weeks then back in for misfires on 3 and 6. moved coils around and cleaned EGR passageways (almost completely plugged), vehicle back again, ... Trouble codes: P0303 (p0304-), P0304 (p0305-), P0305 (p0300-), P0300
2000 Hyundai Accent GL 1.5L Emission monitors VIN: KMHCG45G5Y
Hello techs. I'm having a problem getting the veh to set the Cat and evap monitor for a smog check. Evap I will be able to handle. Has new cat and both O2 sensors. Previous cat was starting to plug up and would set a PO420 code after a very short drive. Prior ...
2012 Kia Optima LX 2.4L MIL Lamp on VIN: 5XXGM4A76C
Got this gem from body shop. Front-end collision. all main grounds on left front cut. spliced in crimp solder and shrink all new leads, replace ground cable to get vehicle to start. Body shop fixes front end, brings car to my shop, with some connectors loose. ... Trouble codes: P0326 (Knock sensor)
2002 Mercedes-Benz ML320 3.2L ignition switch VIN: 4JGAB54E12
Installed new steering column, tried to switch the ignition switch - will not turn in the new column - unable to complete the installation.
2007 Nissan Sentra SL 2.0L shift indicator light/s VIN: 3N1AB61E47
Hi Guys, Well I'm looking for a short cut on this one. It's my daughters car.. last night she tells me the shift indicator lamps (on shift console) all stopped functioning at once. But the trans is functioning normally. I looked the wiring up on alldata and ...
2008 Nissan Altima 2.5L Surge, Cuts out, Misfire VIN: 1N4AL21E38
Need help guys, customer brought the car in stating it almost didn't make it to the shop. Pulled the car in & it had a slight cyl. Missfire. Only code is po300. Replaced #1 & 2 coils & plugs because the plugs were wet. Helped for 1/2 the test drive then almost... Trouble codes: P0300 (Mutiple missfire)
2009 Nissan Quest 3.5L MIL Lamp on VIN: 5N1BV28U99
We got a 2009 Nissan Quest here with fuel trim problems at idle. The short term fuel trim constantly cycles from 25% to 0% to 25% (im reading this in OBD2 data) and we notice a surge in idle speed. Also the idle is high, about 1000+ in park/neutral. I tried... Trouble codes: P0171 (Lean bank 1), P0174 (Lean bank 2)
2001 Oldsmobile Aurora 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3GR64H51
This one runs smoothly at startup, misfires after warmup drive. Misses only on 1-3-5 bank, espescially #5. I have tried to find this problem for 3 days, no help. No engine noise. Any ideas? TIA Mike [...] Trouble codes: P0300
2007 Pontiac Grand Prix GT 3.8L ect sensor cooling fans VIN: 2G2WR55437
but all I know is when the ect is plugged up to the harness the cooling fans will not come and and overheat the car. I can command the fans on through the solus. the fans come on when the ac is turned on. they will not turn on at idle and overheat the car. onl...
2007 Suzuki Grand Vitara 2.7L driveability VIN: JS3TD94107
Car will not pass emissions test for a Code P0171 and P0174 and these codes are pending as well. The only checks that were on identifix where the pcv hose that is know to crack and leak. This vehicles hose is OK. The short term Fuel Trims are at or close to 0 ...
1994 Toyota T100 SR5 3.0L ignition timing VIN: JT4VD20A8R
Hi Toyota techs.This T100 will not accelerate when the timing is set to 10 degrees.Upon checking with a timing light and watching the scanner,I realized the timing is retarding about 15 or 20 degrees on throttle opening.Checked G1,G2,and NE coils resistance in...
2002 Toyota Corolla CE 1.8L Excessive Emissions, Loss of CL fueling VIN: 1NXBR12E72
Random loss of Closed Loop status at 2500 RPM causing high tailpipe emissions. History: Failed emissions test both idle and 2500 RPM, Gross Polluter status (about double allowed). Diagnosed corrupted fuel control caused by slow oxygen sensor limiting CL statu...
2005 Toyota Tacoma 4.0L Ignition? VIN: 5TEMU52N65
OK, Toyota Techs. This one is for you. When shifting FROM any gear TO Park, the engine stalls. It dies rapidly, as if the key was turned off. It will start right back up. If shifted TO park fast enough (very fast), the rpms, momentarily, drop but recovers and ...
2001 Volkswagen Beetle GLX 1.8L cam to crank sync VIN: 3VWDD21C81
p1340 cam to crank correlation is killing me. have checked cam to crank timing, have checked cam to cam timing and have 16 links between marks. have replaced cam sensor same problem, what am I missing.
2001 Volvo S60 2.4T 2.4L Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: YV1RS58D81
So im stumped, this car will run prefect for 3-5 days, then it will go haywire. No check engine light,stall,surge,stumble nothing at all. Then it doesn't matter hot or cold it will start to act up. First from a stop when you just barely touch the gas it will s... Trouble codes: 644A

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2002 Audi A4 Quattro 3.0L cam phazer VIN: WAULT68E32
Took some outside source advice and removed timing belt and reset timing, tested and vehicle runs well now. No misfires or returning codes, have put a dozen or so miles on repair, no issues however have not taken it above [...]. car is out the door and happ...
2001 BMW 325i 2.5L door locks VIN: WBAAN37461
Special thanks to the 7 people who tried to help me with my problem on this BMW. Some of the ideas I had already tried (ie disconnecting and reconnecting the battery, going through the trunk, which on this model wasn't an option, using a wedge tool to pry open...
2004 BMW X5 3.0i 3.0L cooling system VIN: WBAFA12020
Hi Guys thanks for all that replied to my help request.I carried out a cylinder leakage test on all cylinders and found no.3 had 30% leakage and bubbling in the radiator with the cap removed.The customer opted to replace the engine with a low km's second hand ...
2007 Chevrolet Silverado 2500 HD WT 6.6L Ecm/Injectors/Injection Pump VIN: 1GCHC29657
The injector driver located in the ECM had failed on the power side. It was only producing 10-12 volts and should have been significantly more than that. Replacing the ECM would be beginning of the fix because due to the contamination of fuel the it also needs...
2007 Chevrolet Colorado LT 3.7L ignition VIN: 1GCCS13E07
After pulling my hair for a day trying to figure out what I was missing I follow some of your suggestion of bad reprograming on new module I decided to clean the burn areas of the old bcm and hook it back and the car start it, a lot of things where not working...
2005 Chrysler PT Cruiser GT 2.4L No Start VIN: 3C3AY75S55
got one post on how to trick program into installing flash, installed flash and ended up with pcm setting 5 codes that were false. thought maybe bad new pcm got another still showed no program while chrysler 2534 program said good. got a hold of drew tech, the... Trouble codes: P1602.
1998 Dodge Caravan 3.0L Cuts out, Misfire, MIL Lamp on VIN: 2B4FP2539W
To All , The owner acquired another used distributor and it got properly installed,there was no change to the intermittent code of P1391. He returned the CKP sensor to Autozone and exchanged it for warranty. It got properly installed and for the time being the... Trouble codes: P1391 (Intermittent loss of Cam signal).
2008 Dodge Grand Caravan SXT 3.8L MIL Lamp on VIN: 1D8HN54P88
had tech remove transaxle and found flexplate cracked all the way around center and ring had shifted. Trouble codes: P0016 (Cam Crank Sensor Corrilation).
1999 Ford F-350 Super Duty Lariat 5.4L slip with heavy load and torque converter lockup VIN: 1FTSF31L2X
the pickup is still having converter lockup issues. reading up on other forum websites i learned that other manufactures have had issues with the converter clutch control valve in wearing and leakby. im going to dissassemble the transmission front pump and mea...
1999 Ford Escort ZX2 Hot Coupe 2.0L Surge VIN: 3FAKP1131X
What we did was tweak the idle stop, while watching TPS and IAC values. We started at .82V. Finally settled on .86, with 19% IAC. Did the hard reset and relearn again, base idle is much better, though there is a 200rpm flare when the AC turns on. But it is acc...
2003 Ford Windstar LX 3.8L lights locks VIN: 2FMZA51423
good evening all thanks to paul and michael ended up being bad fuse block terminals was rotted away behind the fuse box thanks again for the help
2006 Ford F-250 Super Duty XLT 5.4L Steering VIN: 1FTSW21506
Well Guys, thanks for all the info. I did the best I could to check and test all the parts that I thought were related. I made recommendations to cust and only wanted the steering damper changed. Possible cause I made it seem like this would fix it. I tested a...
1999 GMC Jimmy SL 4.3L No Start VIN: 1GKDT13W0X
Thanks for the help. Checked the return line and found no problems with it pinched it off with no change in fuel pressure. New ac deco fuel pump and the fuel pump is 55 . Thanks agin for the help
2007 Honda CR-V EX 2.4L Unknown VIN: JHLRE48727
Was misled thinking that the customer's certified pre owned vehicle would warranty the transmission (called dealer; was told this). Customer called the dealership that sold her the vehicle and did confirm this however when she had it towed there they informed...
1999 Isuzu Trooper S 3.5L valve shims VIN: JACDJ58X1X
thanks to everyone that responded. the problem that i was having was my adjustment was to loose. i needed thicker shims, everyone's help was for tight valves. so the heads made the long 12 hour total trip to the big city for a proper valve job. thanks for the ...
2007 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: SAJWA51A07
thanks to all! replaced injector and so far no check engine light.
2005 Kia Sorento EX 3.5L battery VIN: KNDJC73395
i replaced the three diodes under the dash on the drivers side. i believe that the bad diode for the dome light was the problem. i would like to thank Brian [...] for the help with getting me the part number for the diodes. thanks to everyone that responded wit...
2002 Mercedes-Benz ML500 5.0L Cuts out VIN: 4JGAB75E02
The time on this help request is drawing to an end. Therefore, even though the vehicle is not yet fixed, I will go ahead and close the request, adding as much new information as I have at this time. I received 7 responses with good information. Some of this I ... Trouble codes: P20D4.
2006 Mitsubishi Outlander LS 2.4L Turn Signal VIN: JA4LX31F06
customer never returned back so i do not have any answers as to a fix. thanks to all who took time to respond. sorry for taking so long to post a reply. thanks again
2001 Nissan Pathfinder LE 3.5L MIL Lamp on VIN: JN8DR07Y71
So the answer is yes, timing that is off will throw this code. With my autoenginuity showing intake valve timing off on that bank, and my lab scope showing a clean signal I am comfortable saying it is mechanical. Thanks for the help always appreciated. Trouble codes: P1140.
1995 Oldsmobile 88 Royale 3.8L Cuts out VIN: 1G3HN52K1S
Replaced PCM and crank sensor. Short version. We learned more about the Modus scope though. And Alibaba. Had the Modus on cam/crank power supply out of the ICM, data line via OBD breakout box, cam ref input to PCM and cam sensor itself. With the new crank sen...
2000 Subaru Outback 2.5L AT Light/TCM VIN: 4S3BH6755Y
I am not 100% sure if we cured the problem but after the work, there was no check engine or AT light flashing. Customer purchased his own computer which we installed and we also installed TPS. After 21 miles or more, trans shifted correctly and no lights. Howe...
2007 Subaru Legacy 2.5i Special Edition 2.5L 3-4 upshift VIN: 4S3BL61637
Customer hasn't returned yet. The temps outside are warmer and problem isn't happening at this time. We feel the problem is most likely a inner lip seal in one of the clutch pack drums. We'll update you went the car is repaired.
1998 Toyota Corolla CE 1.8L Guages fuse blows VIN: 1NXBR12E1W
Hi there and thanks for the help on this one. This one was fixed by broken and ripped wiring by the trunk hinge. We fixed it up and the fuse has not blown since. Thank you Ron
2005 Toyota Sienna XLE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5TDZA22CX5
All six injectors were restricted; though there was no debris in the injector screens. The customer, after explaining the problem and of not finding any obvious reason for the injectors to be restricted, revealed that this happened after filling up the tank ... Trouble codes: P0157 (B2 Oxygen sensor low voltage), P0174 (B2 Lean), P0171 (B1 Lean), P0300 (Random misfire misfires are occurring on B2 only).
2002 Volvo S80 2.9 2.9L Instruments VIN: YV1TS92D12
This thing is Fixed! Thanks to all of you for your excellent suggestions. It turned out the Driver's Power Seat Module(PSM) was shorting out the network when cold. On a warm day, when everything was working, I took it out and put it in my refrigerator for a ...
2004 Volvo XC90 T6 2.9L Damper motors VIN: YV1CZ91H84
There are 5 motors/actuators in this climate control and they are all connected by a lin bus. If any of these motors are shorted,it will bring the bus down and all of these actuators will be inop. In my case,the fresh air/recirculation flap motor was shorted. ...
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