Automotive Technicians Technical Discussion and Fixes for May 1, 2013

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	Help Request	Answers
	2005 Audi A4 Quattro 3.2L battery draw VIN: WAUDG78E95 i have a intermittant draw on this a4, when checked it is within specs, but overnight the rear running lamps come on and stay on and run the battery dead. was wondering if anyone has seen this.	View
	2009 Audi S5 4.2L MIL Lamp on VIN: WAURV78T79 Hello fellow members of IATN, we have a good customer of ours that brought their vehicle into the shop stating while cruising on the interstate with cruise set at approx. 80MPH, the trans felt like it was slipping and the cruise shut off, rpm's increased and t... Trouble codes: 05493 (Right engine mount soleniod valve short to pos. p1575), 2815 (Accelerator position sensor 2 signal too low. p2127)	View
	2004 BMW 325i 2.5L Surge, Cuts out, Stall, MIL Lamp on VIN: WBAET37434 To start this car was running GREAT!!!Before my customer and his uncle attempted to change the fuel filter. What i was told is that the uncle replaced the fuel filter and the car didnt start so he came up with a bright idea lets spay sum starter fluid in the t... Trouble codes: P0328 (knock sensor 1 circuit high input bank1), P2197 (oxygen sensor signal biased/stuck lean bank2 sensor1), P2195 (oxygen sensor signal biased/stuck lean bank1 sensor1)	View
	1987 Buick Electra Park Avenue 3.8L Excessive Emissions, Poor Idle Quality, Surge, Poor Fuel Economy VIN: 1G4CW5134H changed 5 MAF sensors and 1 ecm vehicle idles @approx.1000 rpm and runs rough @ cruise.all sensors reflect running condition of a lean system;block learn=130-138,vac guage reads 18-19 inches @idle,tps=.65@idle and doesnt drop out with increased throttle pressu...	View
	1998 Cadillac DeVille 4.6L Ac VIN: 1G6KD54Y2W At times the AC vents will blow out of the defrost vents. This happens on start up and will continue until the vehicle is shut off. It does not happen often. Also when we pulled it inside for the night we noticed the blower motor running even with the keys out...	View
	1997 Chevrolet Express 2500 LS 5.0L Unknown VIN: 1GCFG25M0V fuel pump is on constantly upon key turned to ignition and never stops No spark or injectors operating Scan tool does not see the ecm. If i replace the ecm with a used one of the same year and engine size will she run??? or do i have to reflash/reprogram??? ...	View
	2002 Chevrolet Silverado 1500 4.8L exterior lighting VIN: 2GCEC19V82 Truck came in for poor running,found low fuel pressure 30psi.Pump was just changed by customer.Then found that truck has electrical issues.When engine running hit brake pedal it quits.Exterior lighting{running lamps} go out when brakes applied and no brake lig...	View
	2004 Chevrolet Silverado 1500 4.3L Engine VIN: 1GCEC14X24 Stall happens after running for random periods of time, and will always restart with no hesitation regaurdless of temp. I've looked at the connections at the distributor as well as the connections at the coil, since these are common failures, these are good. A...	View
	2005 Chevrolet Colorado Z85 LS 2.8L Starter VIN: 1GCDT19875 Hi guys - first time post for help - have a truck with a starting issue - towed in - found ignition switch binding ,so replaced with dealer parts , did passlock relearn and now i have a starting issue that is puzzling - i can crank the truck and it will give m...	View
	2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15FX6 Hi Techs, Have this cobalt that came to me for state emission test and found codes PO411 and P2440 stored in PCM. After a quick look, I found the air pump was seized and would run a little if you tapped on it and also found AIR injectio control solenoid rusted... Trouble codes: P0411	View
	2007 Chevrolet Silverado 2500 HD Classic LS 6.6L MIL Lamp on, Limp Mode VIN: 1GCHK23D87 This truck throws a P0087 code and goes into limp mode, restricted to 40 MPH when the customer is hauling heavy loads in hot weather only. All winter long it was fine, it only fails on 75+ days after miles of driving. Balancing rates are Cyl 1 -3.2, Cyl 2 +1.3... Trouble codes: P0087 (Fuel Rail/System Pressure Too Low), P0401 (EGR Flow Insufficient Detected)	View
	2008 Chrysler Pacifica Touring 4.0L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 2A8GM68XX8 Hello, I have a Pacifica that does this thing whenever it feels like it: Customer states (and we verified) that occasionally it does this: Hesitates or bucks, lightning bolt light flashes (electronic throttle control), MIL comes on, trac light comes on. We jus... Trouble codes: P0344 (Cmp sensor intermittent), C121C	View
	1998 Dodge Ram 2500 5.9L NO engine power I have check power and ground at the ecm and at the injection pump module. wires are in good condition and I have no shorts on the circuite This truck starts and runs but it will not pass 30MPH, I have code present and I erase this code but it comes back, the ...	View
	2002 Dodge Stratus SE 3.0L MIL Lamp on VIN: 4B3AG42HX2 Hi iATN, I have searched high and low trying to come about a vacuum time specification for the EGR system on this car. After thoroughly researching this EGR system, I have a full understanding on how the system is supposed to work. I understand that when the P... Trouble codes: P0401 (EGR flow insufficient detected)	View
	2004 Dodge Ram 2500 ST 5.9L No Start VIN: 3D7KU28C24 Hi everyone, this truck has been coming back often and injectors keep shorting, and its not always the same one. after repairing shorted injectors it seems to run fine, then it has same issue after just a few days, i have checked all wiring and all seems to ch... Trouble codes: P2149, P2146	View
	1988 Ford F-150 Custom 4.9L steering VIN: 1FTDF15Y6J vehicle only makes noise when turning to the right from a stop, has to be a hard right, noise is a grinding,creaking sound. will not make noise on the lift. no play in stering system or ball joints,Drives fine down the road, could this be a ball joint noise, e...	View
	2001 Ford Expedition XLT 5.4L Master cylinder VIN: 1FMPU16LC1 Truck came in for brake pedal sinking when at a stop.brake master has been replaced twice.it sinks down but doesn't seem to go to floor but it gets low.looking for suggestions were to go at this.pump pedal and it pumps up but when holding it starts to sink.can...	View
	2003 Ford Crown Victoria LX 4.6L Misfire, MIL Lamp on VIN: 2FAFP74W43 Good morning, Patient came in last week with MIL on and 1 code - PO358 - coil H primary / secondary circuit malfunction. Customer states she drove the car aprox. 10 miles and while stopped for a traffic lite, car began to idle rough and she noticed the MIL on... Trouble codes: P0358 (PRIMARY / secondary circuit malfunction coil H)	View
	2011 Ford Mustang GT 5.0L No Start VIN: 1ZVBP8CF1B I am at a friends body shop, trying to give them a hand. It is a 2011 mustang. The data on the generic OBD11 scanner shows -36 engine coolant. 61 intake air temp. -36 ambient air temp. 158 cranking rpm. Car may start and run for a few seconds, but 99% of t...	View
	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 ...	View
	2004 GMC Sierra 1500 SLE 5.3L driveshaft VIN: 1GTEK19T34 we have this 4x4 gmc that under just the right load and road speed-(38-40 mph) in 2 wheel drive there is a noise and vibration coming from the rear end of the vehicle. it feels like it has the harmonics of driveshaft speed. we pulled the truck on the lift but ...	View
	2003 Honda Civic Hybrid 1.3L IMA light on VIN: JHMES956X3 The owner of this car left it at our shop and recently gave me the title. I am the proud owner of a broken Honda Civic Hybrid. Our shop uses the Snap on Solus scan tool. The HV battery charges, but there is no HV assist. If you clear P1440 it will start on ... Trouble codes: P1440 (IMA system failure)	View
	2001 Jaguar S-Type 3.0L compressor compressor will come on for about 1 second and shut off.When you cut the key off and start the engine it does the same thing.I am suspecting the pressure switch but cant find any information on how to check it.I can jump the compressor relay and the compressor...	View
	2003 Jeep Liberty Sport 3.7L Cooling fan VIN: 1J4GL48K33 This vehicle came in with the fan not working and the radiator popped because of the overheat. We replaced the cooling fan relay,the cooling fan and the radiator. Vehicle came in a few months later with the fan not working and the rad popped again. I noticed t...	View
	2005 Mazda Tribute S 3.0L No Start, Poor Idle Quality, Stall VIN: 4F2CZ94175 Ok folks, this one is making me loose what little hair I have left. This 05 Mazda Tribute / Ford Escape runs real good at cruise and at idle after we replaced the coils and plugs with all Motorcraft stuff. Then we replaced the front cat and very back cat. Here...	View
	2004 Mercury Mountaineer 4.6L No Start VIN: 4M2ZU86W34 car came in with a no start condition, did all of the tests to diagnose a bad fuel pump, replaced pump, did not do the trick. I have no fuel pressure...fuses and relay are all good, have power to everything. still no fuel pressure. cant hear the pump run. the ...	View
	2003 Nissan Murano SE 3.5L Misfire VIN: JN8AZ08T03 Vehicle came into shop with p0300. It has a dead miss on clinder#1 replaced coil and sparkplugs. i even swapped the injectors around to see if the misfire would change to different cylinder. Did a compression test is at 180 psi. Im lost here what can i be over... Trouble codes: P0300 (Random misfire)	View
	2003 Pontiac Bonneville SE 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G2HX52K43 Hey everyone, got another one for you all to ponder over. The customer called and said his check engine light came on the other day 3 weeks after I fixed his MAF problem. When he dropped it I noticed that it idled really rough when I started it and kind of cam... Trouble codes: P0171 (HO2S lean bank 1)	View
	2007 Porsche 911 Turbo 3.6L Poor Idle Quality, Surge VIN: WP0AD29937 Car came came in with an Idle surge that is not at regular intervals but seems to get worse as engine warms up. Original code pulled with Durametric(I know its not a good scanner but its what the shop owner bought us) was a 1010 HFM electrical fault. This engi... Trouble codes: B1010 (HFM electrical fault value below lower limit), B1810 (air massHFM ahead of throttle plate implausible upper limit value exceeded), B1510 (air massHFM ahead of throttle plate implausible implausible signal), P1090 (manufacturer specific)	View
	1997 Saturn SL1 1.9L No Start VIN: 1G8ZH5287V Both pcm fuses blown -- pcm b pops as soon as its instaslled & pcm 1 pops when cranked/key on -- unplug pcm & fuses are ok -- pretty much tells me pcm is toast -- my question is about pcm programming. The local parts store can flash pcm before delivery. Is the...	View
	2003 Saturn Vue 2.2L Poor Idle Quality, Surge, MIL Lamp on VIN: 5GZCZ43D53 On cold start fires right up and runs good, just that idles to high and races to over 3,000 rpm runs good for about 30 to 40 seconds and then service engine soon and power loss lights come on at same time. Then it runs very rough no misfire codes, plugs, coil ... Trouble codes: P1514 (Airflow to tp sensor correlation high)	View
	2007 Suzuki Swift+ 1.6L Misfire, MIL Lamp on VIN: KL5TJ66637 The origanal problem still exists when you come to a stop after cruising quite often it will misfire for 4to5 seconds and then smooth right out when it sets a code it always flags #1 cyl misfire.We have tried blocking the egr off also swaped injectors from #1 ... Trouble codes: P0301	View
	2003 Toyota Camry LE 3.0L MIL Lamp on VIN: 4T1BF30K23 has instant codes p0032 and p0052 within 15 seconds of clearing. Sensor heaters both show 3.8 ohms when cold. With key on, both sensors have battery voltage to heater. With key on, sensor harnesses disconnected, voltage reading between PCM ground wire and B+ w... Trouble codes: P0032, P0052	View
	2005 Volkswagen Passat GLS 1.8L CEL's on VIN: WVWAD63BX5 Hi VW & Audi Gurus, Car comes back for CEL's on with same code P0171,no more misfire as it came to shop last visit. Engine runs so smooth,so we smoke test again and found no leak. Hook up Magnehelic gauge and the needle went all the way to stop,which is more t...	View
	2009 Volkswagen Beetle 2.5L Battery VIN: 3VWRW31C89 Customer just purchased vehicle last week in oklahoma where had to install new battery before could drive back to missouri. Next day, battery dead, jump start. Same issue next three days until brought here. Charging system just fine, has .5amp draw on fuse #4 ...	View
	2003 Volvo S60 2.4T 2.4L Cooling Fan VIN: YV1RS61TX3 Bought this 03 S60 recently and repaired fuel delivery issue. Once driving the vehicle found that A/C was inop. Checked compressor for operation, checked refrigerant, etc. Issue I found was cooling fan would not turn on with A/C. Fan did not seem to work with ...	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2001 Audi A6 Quattro 2.7L brake/parking lights VIN: WAUED64BX1 thanks for all your replies.after adjusting brake switch,veichle has not returned.I will repost a fix if veichle returns and is repaired.I appricate all your info.looking forward to helping someone else in future.I.A.T.N.rocks.thanks,Bill	3
	2002 BMW 325i 2.5L Brake Booster VIN: WBAEV33402 Thanks for the replies. I did try numerous ABS activations and then a re-bleed. I even bleed the hydraulic unit and then went to each caliper. I thought it got better but not much. Accompanied with the "free play" I had a noise with a pulsation so I replaced b...	7
	2006 BMW 330i 3.0L Electric Pump, Radiator, Thermostat VIN: WBAVB33506 THANK ALL OF YOU FOR YOUR REPLIES. AFTER READING THEM AND FURTHER DIAG. WE CONCLUDED THE WATER PUMP WAS BAD. CUSTOMER HAS AN AFTER MARKET WARRANTY AND THEY DECLINED REPAIRS. CUSTOMER HAS YET TO BRING CAR BACK IN TO BE REPAIRED SO GUESSING THEY FOUND SOMEBODY C...	15
	2005 Buick Rendezvous CXL 3.4L gauge VIN: 3G5DA03E05 vehicle is fixed.the gauge going up is normal operation.After more drilling customer for info,they said they had the a/c on but it got too cold so they shut off a/c but not the engine and shortly after that is when it heated up on gauge.thanks for all the inp...	13
	2004 Cadillac DeVille 4.6L windows VIN: 1G6KD54Y94 I finaly fix the 04 cadi, it was 3 wires pinched in behind the door stop hinge on the the divers door, and it happen be the 2 wires going to the pass front door, cust said the door had never been repaired befor,m but i find it hard to believe it came from the ...	8
	2003 Chevrolet Express 3500 6.0L No Start VIN: 1GCHG39U83 We replaced the lock cylinder and housing. Performed a relearn and all is well so far. Thanks all for your help!	8
	2005 Chevrolet Silverado 2500 HD 6.0L power steering VIN: 1GCHK29U55 To start, thank you all again for your replies. Got that pump changed out with an OE unit, bled per the manual, and all is nice and quiet. The customer is happy and willing to change out that wimpy P/S cooler sooner than later (ie, before winter comes 'round...	13
	2006 Chevrolet Silverado 2500 HD LT 6.6L Tcm VIN: 1GCHK23D66 I GUESS THE MORAL TO THE STORY IS EVEN THOUGH IT IS NEW AC DELCO DOESN'T MEAN IT IS ALWAYS GOOD. A NEW TCM FIXED THE TRUCK.I LEARNED ALOT ABOUT THE BUS SYSTEM...APPARENTLY THE CAN BUSS HAS TO CHECK OUT OK BEFORE IT WILL SHOW PCM AND TCM ON THE CLASS 2 DATA BUS...	9
	2003 Chrysler PT Cruiser Touring 2.4L ignition system VIN: 3C4FY58B33 After completion of my checks, I determined that the car had a grounding problem inside the PCM. The customer decided instead of spending more money on the car that he'd trade it off and make it someone else's concern. Probably a wise decision :-) So I didn...	13
	2000 Dodge Grand Caravan ES 3.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1B4GP44GXY I pulled the trans out of the van and found a crack in the flex plate, but it was not broken all the way around the center. I replaced the flex plate, put vehicle back together. Van still does the same as before, will idle forever sitting still whether in gear... Trouble codes: P1391 (Intermittent Loss Of Crank Or Cam Sensor).	18
	2004 Dodge Durango Limited 5.7L a/c VIN: 1D8HD58D04 Replaced front system expansion valve..works like a champ..thanks for the replies!!!	27
	1999 Ford F-450 Super Duty Lariat 7.3L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, Poor Fuel Economy VIN: 1FDXF46F0X I pulled the fuel injectors on that side, just for my own curiosity and replaced all of the o-rings and washers. I had them tested and ohmed them all out, and they were all within range. I replaced a bad glow plug while I was in there. I replaced the injector ...	12
	2000 Ford E-350 Econoline Club Wagon XLT 5.4L low ac VIN: 1FBSS31L1Y Thanks for all the replies,IATN brethern.I took the advice of many of you and started from scratch.Removed condensor and flushed,Removed all lines and flushed.Replaced compressor and installed new oriface tube.Removed and replaced rear X valve and replaced dry...	23
	2002 Ford Mustang 3.8L engine noise VIN: 1FAFP40482 thank you all for the help. i cleaned everything put in new gaskets, replaced missing and broken bolts. the I.A.C. had been sealed up with lots of rtv so i removed cleaned and regasketed it. When i reinstalled it i looked at the position of the wires. and beli...	20
	2009 Ford Crown Victoria Police Interceptor 4.6L Misfire, MIL Lamp on sorry for the delay with the results... I tried a known good ecm and the problem still was there. after some further diag i found that the ground/ trigger wire for injector #8 was not receiving signal. I used an ohm meter and determined that the wire has a bre... Trouble codes: P0308, P0208.	17
	2008 GMC Yukon Denali 6.2L Hesitation, Surge VIN: 1GKFK63858 Ok so the fix for this vehicle is their is definatly supost to be 12 volts on that wire when truck is running. After doing some more test, found that the wire was rubbing on front drive shaft. everytime the front drive shaft would turn it would pull the voltag... Trouble codes: P0230.	7
	2001 Honda Civic LX 1.7L timing tensioner VIN: 1HGES15591 Thanks for all the replies. What I found was the pin that the spring mounts on very worn, causing the spring to chafe and break. The only thing I can come up with for the cause is I may not have followed the procedure the first time I did the belt causing exce...	12
	2008 Honda Odyssey EX-L 3.5L b1241 VIN: 5FNRL38738 THANKS TO EVERYONE FOR RESPONSING. IT WAS THE BLOWER TRANSISTOR, BUT MAKE SURE YOU REPLACE THE BLOWER MOTOR TO. IT WILL BLOW THE TRANSISTOR IF YOU DON'T.THANKS AGAIN FOR EVERYONE HELP ON THIS MATTER.	14
	2003 Jaguar S-Type 4.2L computer VIN: SAJEA01U53 Thank you all for the replies. After unplugging the parking sensor unit in the trunk I found that at some point the control unit was in water all sorts of corrosion on the pcb board and connecters. Got a new unit on the way. Car communicated after unit was un...	10
	2002 Jeep Liberty Sport 3.7L par/draw VIN: 1J4GK48K72 This one was operator error. The ignition switch was worn out and the key was being pulled out in the accessory position which was keeping the 2 fuses powered up. New switch, problem resolved. Thanks Guys!!	5
	2000 Lexus GS300 3.0L MIL Lamp on VIN: JT8BD68SXY Hello all, still trying to figure this one out. However since it is time to close this help request, here is what has been done. Remove and clean all solenoids inside transmission. Change transmission oil and filter. Top-up with Toyota Type T-IV, no help. Also... Trouble codes: P1755 (Linear Solenoid for Lock Up Control malfunction. Shift Solenoid Valve SLU).	3
	2003 Mercedes-Benz CLK430 4.3L Convertible top VIN: WDBLK70G33 Thanks for all the advise, with my DAS machine I did not see any response from soft top switch and my wiring diagram did not match factory wires.so I send the customer to MB dealer, I am assumeing the soft top computer is bad .	10
	2006 Mini Cooper S 1.6L Extended crank cold VIN: WMWRE33596 I finally have the pressure tester back at the shop. Our suspicions were correct. The fuel pump check valve is bleeding off fuel pressure. Swapping out the in tank pump assembly appears to have fixed the problem. Thanks to all of you that replied, much appreci...	4
	2004 Nissan Maxima SE 3.5L brake booster Sorry for the late reply we replaced master and booster with quality used nissan parts ,Flushed brake system system and vacuum bleed all lines. repair was now 90% better. Road tested and applied a couple hard stops to engage abs and boom 100%. Thanks to all wh...	12
	2007 Saab 9-3 Aero 2.8L mil VIN: YS3FH56U07 Thank you for all your help. Turned out the problem was that someone had disassembled the instrument cluster and put a piece of black tape over the led. Since this was not a common complaint, we started by testing the signal at the ecu to make sure it was gr...	7
	2000 Saturn LS2 3.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G8JW52R2Y SO I WAS GOING TO DO THE INTAKE MANIFOLD GASKETS, DECIDED TO DO A CYLINDER LEAK TEST AND FOUND OUT THAT CYLINDER NUMBER 3 ON THE BACK HAD NO COMPRESSION AT ALL AND THE OTHER TWO ON THE BACK HAD LIKE 30 PSI. WHEN I WAS DOING A COMPRESSION TEST BEFORE I ONLY DID... Trouble codes: P0056 (Heater oxygen sensor bank 2 sensor 2).	16
	2000 Toyota Celica GT 1.8L MIL Lamp on VIN: JTDDR32T9Y Thanks James, Joshua, Andy, Timothy, Stephen and Sean. You all gave me exellent advice!! and were pretty much right on!! When I got the car back to recheck the system the ECM was doing its job properly. I checked the oil pressure to make sure it was within ... Trouble codes: P1349 (Vvt system fault bank 1).	6
	2000 Volkswagen Beetle GLS 2.0L Cuts out, MIL Lamp on VIN: 3VWCA21C9Y Thanks to those who took the time to help. We tested everything we could think of. We tested all of your replies. Everything checked out fine. We recommended that we replace the computer and the customer declined. Trouble codes: P1579, P1565.	6

(Also Available: All, Asian, Chrysler, European, Ford, GM.)