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Prev Professional Automotive Repair Technical Discussions for January 30, 2014
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Help Request Answers
2002 Audi A6 Quattro 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: WAULT64B92
Customer bought this car a 2 weeks ago. The engine light came on and it lost power on Saturday, about 9 days after he bought it. When it starts, it misfires bad, runs terrible , has no power, wont accelerate, and backfires through the intake. I have no service... Trouble codes: P3302, P0304, P0305, P0306, P421/, P0024
2002 BMW 325Ci 2.5L Shifting VIN: WBABN33472
Customer stated problems were sudden, no previous warnings. ZF5hp-19 steptronic transmission, 2WD. Car runs very well, Trans Oil level correct but very dark (expected since no knowledge or records of it ever being serviced (lifetime lubricant...ya right!). Rev...
2010 BMW M3 4.0L EDC steering angle sensor VIN: WBSWL9C57A
This M3 came in with a new strut and knuckle on RF. We were just supposed to do an alignment, another shop did the work. everything looks in order. I performed an alignment and then calibrated the DSC steering sensor, but now the car (EDC module, not the DSC m...
2006 Buick Terraza CX 3.5L Abs/Tac VIN: 5GADV23L86
Got a debacle here. on the dash (IP) I see: red brake light, ABS light amber, T/C (traction control inop). Also the message center on the IP reads these messages: service ABS, service traction system, service brakes, service stability system. so I started with...
2001 Chevrolet Express 3500 5.7L Hesitation VIN: 1GCHG35R91
Hello i have a chevy 3500 express van under acceleration the transmission down shifts speedometer sweeps to 0 as soon as you let off the gas the seedometer comes back. We checked the speed sensor. With scanner while driving sensor ok reading right. The only co... Trouble codes: C0037 (Trans/abs code)
2006 Chevrolet Silverado 1500 LT 5.3L brake feel VIN: 2GCEK13T66
Bought this truck a few months ago all was well till this morning. Brakes were working fine except for one time only. That one time at less than 10mph the pedal was at normal height then dropped a 1/2 inch, held and came to a stop. The rest of the time was fin...
2007 Chevrolet Malibu LT 3.5L MIL Lamp on VIN: 1G1ZT58N27
freeze frame data shows sft2 16 lft2 20.It takes about 25 miles to set failure.Performed injector flow test,all injectors within 1 psi.I wanted to know if the problem was in the engine or pcm-wiring.Hooked up jumper leads to make bank 1 read off bank 2 sensor ... Trouble codes: P0174, C0561
2008 Chevrolet Cobalt LT 2.2L parking lights VIN: 1G1AL58F58
The vehicle came in with the park and dash lamps inoperative. Replace fuse and after approx. ten minutes of engine run time, the fuse blows. If the car isn't started, the fuse does not blow. Interior, DRL, headlamps, radio, heater control, and trunk lamps all ...
2006 Chrysler 300 Touring 3.5L engine VIN: 2C3KA53G26
This is the second time i coming to my friends at iatn for assistance on this particular vehicle. the first time it was here we could not duplicate the problem. now i can. this vehicle will stall for no apparent reason, when it wants to. codes are as follows, ...
2004 Dodge Dakota Sport 4.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1D7HG38N34
This truck is not firing at all on cylinders 1,2,3&4. Checked compression in #1 and it is 150, swapped coils with 5 & 1, no difference. swapped injectors with 1 & 7, no difference. My scan tool only shows the injectors for 1,2,3,4 and it shows them all in mili... Trouble codes: P0300 (Multiple cylinder misfire)
2004 Dodge Ram 2500 SLT 5.9L lack of power VIN: 3D7KU28C84
after all the above work the truck cant pull its self down a [...],exhaust is clear,turbo checks out,no codes, transmission verified at local transmission shop and given a pass.rail pressure perfect.thinking possible map sensor but no codes in power-train what ...
2005 Dodge Sprinter 2500 2.7L Crankshaft Specs VIN: WDYPD54475
I am in need of crankshaft specifications for end play and oil clearances for this animal... I have exhausted the usual sources and have even downloaded the supposed repair manual on this vehicle too. Sprinter website does not go any farther back than 2010 so...
2007 Dodge Caliber SXT 2.0L No Crank/No Click VIN: 1B3HB48B37
Car Towed Into Our Shop,No Crank/No Click.Battery Charged Good Battery Connections,Tried Disconnecting Battery & Pulling IOD Fuses Per TSB For Key Module Reset No Change.We Found The Trgger Wire From The Integrated Power Module Connector & If We Supply 12volts...
1999 Ford F-350 Super Duty Lariat 7.3L engine will not start VIN: 1FTSF31FXX
This truck is a real gem and has been abused as a plow truck for far to long. I am running out of ideas have tried pcm idm wiggled wires ect... this truck came in as no start cold hard start at 60 deg f but once running and warm could be used all day. Now afte...
2007 Ford Edge SEL 3.5L Noise VIN: 2FMDK49C57
The Customer's complaint is of hearing a loud popping noise and then transmission is inoperative. The first time this happened, the customer had reverse, but nothing else worked. We drove it for several miles and under different conditions with no repeat of pr...
2008 Ford Edge Limited 3.5L Ptu VIN: 2FMDK49C18
We have a 2008 Ford Edge with oil leaking out of the PTU(power transfer unit)vent. It is definately not the axle seals. The oil is black and thick. The fluid level is correct for a 2008. TSB 07-16-10 for 2007 Edges regarding a higher up fill plug that can be o...
2008 Ford Mustang 4.0L Hesitation VIN: 1ZVHT80N68
Car came to shop in limp mode with code P061B. I have read posts on Ford forums that extreme cold weather can cause this. It has been colder in this part of VA than ever for the last month. What I am wondering is if since the engine does not have a heated thro... Trouble codes: P061B
2009 Ford F-150 XLT 4.6L Tach Inop VIN: 1FTRX12869
Hello to all. Customer brought in truck, said tach was not working. I test drove it and it was working fine. UNTIL, I was on my way back to shop and it dropped to zero. Every now and then the needle would bounce a little, but nothing more. I hooked up the Snap...
2011 Ford Escape XLT 3.0L Oil Pressure VIN: 1FMCU0DG7B
Customer went and have his oil change, then the next day he came to us with the oil light the dash. The oil pressure switch was replace because of leaking, still light remains on after running for 30 seconds and stays on. Oil pressure reads 80 psi at i...
1999 GMC C3500 Sierra SL 7.4L Hydro-Boost VIN: 1GDKC34J7X
This truck is equipped with hydro-boost system, p/s system feel normal , truck has good braking, preliminary check normal.customer mentioned p/s wheel felt hard at some point, feels ok now,brake pedal kicks back when applied every time it is applied.brake pads...
2000 GMC C3500 Sierra SL 6.5L MIL Lamp on VIN: 1GDJC34F1Y
Hello, I am working on a 2000 GMC C3500 with a 6.5 liter turbo diesel. The vehicle first came in with a crank no start condition. Customer tried to self diagnose and found that there was fuel at the injection pump inlet but no fuel at the injectors. He did s... Trouble codes: P0251 (Injection Pump CAM System), P0370 (Timing Reference High Resolution System Performance)
2001 GMC Sierra 1500 SL 5.3L Poor Idle Quality VIN: 1GTEK19T61
Hi techs, I have been going in circles on this job .Can not seem to pinpoint the problem. Truck came in with Hi idle and intake leaks. Both banks running lean trims. Also had a higher than normal idle when cold, settled down after 30 seconds but still higher t...
2003 GMC C4500 Topkick C4C042 6.6L Cuts out VIN: 1GDE4E1103
This truck will start and run for appx 5-10 minutes, then just shut off like you turned the key off. No warning, no surging, just from idle to off. The only way to restart it is to manually pump / prime the fuel system again under the hood, but that will only ... Trouble codes: P0540 (Intakr air temp)
2004 GMC Yukon SLT 5.3L Surge, runaway idle
get app 1&2 codes, tps 1&2 codes Tried known good throttle body and accelerator assemblies. Tried stabilant 22, tried known good tach module. Trouble codes: P2120, P2125
2003 Honda Civic EX 1.7L blend door VIN: 2HHES35883
hi everyone, have this acura in our shop with a blend door motor that seems to choose on its own where it wants to move to, the symptom changes but always has the same type of fault, the motor moves the blend door to an undesired position. At the moment the sy...
2007 Hummer H3 3.7L chime VIN: 5GTDN13E57
Since bcm replacement warning chime is extremely loud even on its lowest setting. Literaly Hurt your ears loud. Incedently to adjust the volume setting You have to turn it up to make it quieter. Also cannot bring up additional menus during personalization. Sus...
2005 Hyundai Tucson GLS 2.7L No Start VIN: KM8JN72D35
Have a good one for everyone. Battery went bad. Replaced. Cranked and would not start. Removed front spark plugs and they were fuel fouled. Justed replaced front 3 plugs to see if it would start. Started,ran for 2 seconds and died. Removed front #1 cylinder pl...
2011 Hyundai Santa Fe GLS 2.4L valve train VIN: 5XYZGDABXB
vehicle towed in. Died running at 55mph. Spins over like timing chain is broken. removed valve cover, chain intact, leakdown test shows bent valves. Lowered subframe / engine from car to access timing cover, figuring to find chain jumped due to a bad guide or ...
2004 Infiniti QX56 5.6L MIL Lamp on VIN: 5N3AA08C44
hello every one customer bought 2004 infinti qx56 another state drove home with engine service soon light on.he should not, anyway next day brought to me found code po300 and po1283 .driving home customer did notice intermittanly misfire.customer drove back to... Trouble codes: P0300, P1283
2004 Isuzu Rodeo S 3.5L No Start VIN: 4S2DM58YX4
Vehicle towed in, diagnostics performed for no start/ no spark. Computer deemed to be at fault. Procured a new/used unit and was unable to locate a TechII with an Isuzu card so that the replacement unit could be mated to the Immobilizer in the vehicle. Sent th...
2004 Jaguar XJ8 4.2L No Start VIN: SAJWA71C94
Cranks and sounds as if it wants to start on occasion. Check spark on several right side cylinders, has spark and plugs are not wet. Check injector pulse on both sides, has a single strong flash, then weak and sometimes none. Threw in a crank sensor to no avai... Trouble codes: P1582
2001 Jeep Grand Cherokee Limited 4.7L Heater VIN: 1J4GW58N21
Good Day All One of my best customers has a 2001 Grand Cherokee. While driving this vehicle the heat comes up with engine temp then cools down all by itself. PLEASE READ this before you post. 2 years ago I took the dash apart and replaced the hot/cold blend d...
2007 Mercedes-Benz R320 CDI 3.0L Mass Air Flow Sensors VIN: 4JGCB22E17
Customer stated vehicle lacks power and MIL is on. Stored Code: 2646 - Check component B2/6 (Left hot film mass air flow sensor).: Value is above limit. Mass airflow sensors are in a joint y-pipe assembly feeding from each individual airbox to the turbo inle...
2000 Mercury Mystique LS 2.5L Intake VIN: 1MEFM66L0Y
At idle there is a loud howl or moaning sound coming from the intake.if i lift the air housing away from the air filter,the sound goes away.any one have this problem? i'd appreciate the help.don't know if intake gaskets are the problem.
2004 Pontiac Grand Prix GTP 3.8L Engine/ignition VIN: 2G2WR52464
Hi GM Techs, hope you can help with this one. This vehicle came to us with a serious knock from the engine. By the time the vehicle was unloaded off a car hauler, the noise had quieted down considerably. We started the car cold & it did knock. It sounds deeper...
2002 Porsche 911 Turbo 3.6L mil light VIN: WP0AB29962
This car came in with complaint check engine light intermittently comes on, accompanied by psm and abs lights. Pulled codes and found fault P0102(hot film maf sensor,intermittent, below limit value) in dme and fault 5525(torque transmission from dme intermitte...
1995 Toyota Camry LE 2.2L Poor Idle Quality, Surge, Stall VIN: 4T1SK12E4S
Customer replace head gasket, oil front seal, cam seal, and water pump. The vehicle will stall almost would not start but with some help from gas pedal the vehicle will start. It will idle high around 2000 rpm. When I put in neutral or in park the vehicle will...
2005 Toyota Tundra SR5 4.7L No Start VIN: 5TBBT441X5
I have this '05 Tundra that has failed to start (no crank) for the customer several times, then after sitting an hour or so will start and run normally. Finally we had it towed in when it failed to start and the starter did not operate,no communication with EC...
2006 Toyota Highlander 3.3L Rear Main Seal VIN: JTEEP21A96
Hello Everyone, I am hoping that the Toyota Gurus may be able to shed some light on my problem. I have a rear main seal leak that has me and several other techs baffled. The vehicle arrived with a diagnosis of a transmission front seal leak. We looked closer a...
2006 Volkswagen Touareg 3.2L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: WVGZG77L66
Vehicle was drove in and dropped off for poor running, stall and mil on. Notice "related repair history". Vehicle would not start when brought in. Suspected fouled plugs. Have experience with vw and have the VCDS for them. But do not have much experience with ... Trouble codes: P0300, P0301, P0302, P0303, P0304, P0305

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2006 BMW X5 3.0i 3.0L auto light function VIN: 5UXFA13506
This one is fixed. Everyone who responding pertty much said there alot of issue when using OEM parts. I was informed windows form bmw are either PPG, Sekurit or Pilkingon. We had a pilkington windshield. The issue was it was a none rain sensor winshield and h...
2007 BMW 328i 3.0L battery VIN: WBAVA33587
my sincere thanks to all who took their time to respond; i replaced battery from BMW , registered it w/iscan tool and fixed the problem. but i am still puzzled if the battery is very weak and not taking the charge shouldn't the charging system show low voltag...
2001 Cadillac Eldorado ETC 4.6L No Start VIN: 1G6ET129X1
Repaired with factory injectors. Having the original injectors rebuilt was no good. Thanks for all the feedback
2000 Chevrolet Silverado 1500 5.3L ignition VIN: 2GCEK19TXY
thanks for all the replies.ended up being the ignition switch.voltage was dropping out to the coils in cranking.thanks again!!!
2001 Chevrolet Silverado 3500 LS 8.1L Lack of power VIN: 3GBKC34G11
2002 Chevrolet Trailblazer LS 4.2L oil pressure VIN: 1GNDT13S52
Changed oil and filter and pressure overall stayed more stable but have no idea if pressure is correct. While I'll agree with everyones ideas, any proposition of opening up this engine with 241 K on for an inspection was to high a price to pay. The oil pan re...
2004 Chevrolet Silverado 2500 HD 6.6L Misfire, Poor Fuel Economy VIN: 1GCHK23134
well guys thanks for all you help.It turns out that the cp3 pump was the culptrit.I learned a couple of things on this one.I learned that you could see the pump shaft through the filler hole and learned that that one in a million problem could land on anyone.t...
1997 Dodge Ram 1500 ST 5.9L Hard start VIN: 1B7HC13Z2V
Took a few days and a couple of unusual situations with unrelated things going on at the same time to get this truck running outta whack. That said, I had shot this S.O.S. out of frustration and after a really bad day. That there was perhaps insufficient info...
2001 Dodge Ram 1500 ST 5.2L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1B7HF13Y41
Thanks to all who replied. This truck is fixed, the repair was the crankshaft position sensor. Most of the replies I received indicated that this would be the likely cause. Several replies indicated a possible transmission problem, but that does not seem to... Trouble codes: P1391.
2006 Dodge Ram 1500 ST 4.7L Poor Idle Quality VIN: 1D7HA18N06
we decided to release the vehicle to the customer. no check engine light, no abnormal fuel trim readings, no unusual noises, no overheating and no drivability issues. the only thing was that slight vibration and only when it idled in gear. we drove the car ...
1996 Ford F-350 XL 7.3L Surge VIN: 1FTJW36FXT
Sorry it took so long to report back. What I found after check all the wires could not find any problems with them. The problem I was having with the overdrive is it would shut off each time you turn the ignition switch off and on and if you left the ignition ...
2006 Ford Expedition King Ranch 5.4L airbag light VIN: 1FMFU17586
Hey guys. Thanks for all the feedback. The steering column was damaged and was causing the clockspring to chew up the bottom of the clockspring ribbon. The steering column and the clockspring have been replaced and it seems to be doing fine. Have a great day e...
2008 GMC Yukon Denali 6.2L Park Lights VIN: 1GKFK63808
OK, it's fixed. after sorting out the differences between the Mitchell wiring diagrams and the pin number and locations on the relay, truck had erratic readings of low voltage to no connection on the control wire to the BCM. Traced this wire back and found sho...
2003 Infiniti G35 3.5L no acceleration VIN: JNKCV51E63
Thank you to everyone that provided feedback. We are very cautious about condemning modules here, but this time it was the right thing to do. We replaced ECM with a used unit per customer request and got our 5 volts [...], then learned that security system re... Trouble codes: P0102 (Mass air flow), P0227 (Tps), P0226 (Tps), P1229 (5V sensor reference high or low), P0222 (App), P0221 (App).
1999 Mazda 626 ES 2.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Poor Fuel Economy, MIL Lamp on VIN: 1YVGF22D1X
2000 Mercedes-Benz S430 4.3L AIRmatic VIN: WDBNG70JXY
Thank all of you for your help. I found that the f.r. height sensor failed and caused the entire system to shut down. It makes sense to me know (after using my friends Autoland Scienceth VeDis scan tool) I realized that if the system doesn't know how high one ...
2005 Mercedes-Benz ML350 3.7L No Start VIN: 4JGAB57E15
well thanks everyone for your time replaced crank sensor as most response.customer pick up vehicle next day no start crank ok. least it was not crank sensor. let sit overnite next day start fine driving three days so far start every time.check fuse box and fu...
1997 Mitsubishi Diamante LS 3.5L Sunroof & Door Locks VIN: 6MMAP47P2V
There was only 1 response, thanks James for that, but the owner did not want to spend any more money at this point. We disconnected the sunroof motor so that it would stay closed. We felt like there was an open circuit between the driver door lock switch and w...
2010 Nissan Altima 2.5L heatet VIN: 1N4AL2AP9A
sorry guys i was on a vacation i came back last week thank all you guys the car is fix i put the car front up and bleed the coolant and we get the heat back thank you the only thing i don/t no why it was low on coolant
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