Automotive Technicians Technical Discussion and Fixes for Apr 1, 2013

Join Now

Prev	Professional Automotive Repair Technical Discussions for April 1, 2013 International Automotive Technicians' Network (iATN) - Members Only	Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for All Makes and Models

	Help Request	Answers
	2006 Audi A4 2.0L power windows & sunroof VIN: WAUDF78E96 Hey Euro Gurus! This Audi has no power window or sunroof operation. Mostly just looking for confirmation of a diagnosis and any pertinent info that can be given. I have verified power and ground to the drivers door module and the central electrical module(unde...	View
	2006 BMW X3 3.0i 3.0L Hesitation, Surge VIN: WBXPA93436 This x3 has a stutter/hesitation under mild to heavy load at 3k rpm and higher. Feels almost like at misfire but plugs and coils have been changed and problem still occurs. No codes in Engine or Trans. Does have oil wear in transfer case module. Fluid looks ne...	View
	2010 Buick LaCrosse CXL 3.0L MIL Lamp on VIN: 1G4GL5EG8A Vehicle came in for Cat efficiency codes, Scan tested and road tested . when throttle is snapped while graphing o2 sensors the spike in the pattern seems to occur at the same time on pre and after cat sensors. At a recent snap on course it was stated there sho... Trouble codes: P0300, P0420, P0430	View
	1999 Chevrolet Astro LT 4.3L timing componants While having the timing chain off,on the gear to gear set up I can turn the cam gear from side to side three or four grooves without no problem,are they supposed to move that freely or not.	View
	2001 Chevrolet Silverado 1500 4.8L oil filter VIN: 1GCEK14V51 customer called in and indicated oil leak at filter, customer said filter o-ring blew out. customer put another filter on and that one blew out also. towed truck in. remove filter and install one of ours, verify engine block is clean and no other gasket stuck ...	View
	2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29143 this is my first post so please bear with me. customer just bought truck from a private party and started to have long crank issues, i replaced the fuel filter and noticed prime pump did not work well so i replaced all the seals and now primes system well. sti...	View
	2005 Chevrolet Avalanche 1500 Z71 5.3L brake wear VIN: 3GNEK13T05 replaaced brakes at 130000 km came back after about 20000 km and brakes on right rear were wore out metal on metal, replaced both calipers and brakes and came back now at approx another 20000 km with smae issue inside pads are wearing out very quickly. i know ...	View
	2005 Chevrolet Trailblazer LS 4.2L Mechanical VIN: 1GNES16S45 Customer brought this Trailblazer in for a noise. Put on the rack and ticking noise sounded like coming from the transmission pump area. Dropped pan and there was a lot of metal shavings in the pan. Pulled transmission tore down and found wear on the converter...	View
	2007 Chevrolet Trailblazer LS 4.2L Sunroof When operating the sunroof it works ok. It closes fine but at the end of the cycle it drops down at the back 1/2 inch. I do under stand that it is cable operated. Could this be a stretched cable, Or something broken. I don't want to pull the headliner down and...	View
	2004 Dodge Stratus SE 2.7L Hesitation, Cuts out VIN: 1B3EL36T24 Well hello again. I almost got this one but it looks like I'll need some advice from someone out there. Customer's complaintis that her 2004 Stratus 2.7 L. jerks on the freeway and it wants to take off from a stop. This are all the trouble codes I got, P736, P... Trouble codes: P0736 (Gear ratio error in reverse), P0720 (Output speed sensor error), P0731 (P0732 Gear ratio error in 1st 2nd.), P1790 (Fault immodiately after a shift), P0201 (Fuel injector 1 circuit), P1684 (Battery was disconnected)	View
	2006 Dodge Ram 2500 SLT 5.7L no shift any gear VIN: 1D7KS28D66 Driving 30 mph just stop moving no diference in any gear.Had towed to shop,thinking possible converter?	View
	2006 Dodge Ram 1500 ST 4.7L Intake Vacuum VIN: 1D7HU18N66 Truck came in running poor at times and a rich code bank 1. Also had an O2 bank 1 sensor 1 high and 2 missfire codes. Tried replacing the Bank 1 O2 sensor - no change. Checked the fuel pressure, 70psi, the high end spech is 60psi. Replaced the fuel module, fue...	View
	2007 Dodge Nitro SXT 3.7L Starting VIN: 1D8GT28K27 This vehicle was towed in with intermitent no start. We were able to get vehicle to start then it just clicked. Voltage at the starter is only three volts. The starter relay can have power applied to pin 87 an vehicle will start.ther is only 3 volts on relay p...	View
	2007 Ford Expedition Limited 5.4L Drive Line VIN: 1FMFU20507 When the vehicle is in 4x4 and you decelerate as if you coming of the HWY we are getting a light thump thump thump noise from the front differential area if you take it out of 4x4 the noise goes away, it does it at lower speeds also but the noise isn't as loud...	View
	2008 Ford Expedition XLT 5.4L No Start, Stall VIN: 1FMFU16518 hey ford guys i have a quick question i have a 08 expedition that stalled and wont start does this car have a fuel pump driver module or just the fuel pump itself. it will start on carb cleaner.i have looked all over but i dont see a driver any where.	View
	2010 Ford Escape Limited 3.0L alternator VIN: 1FMCU9EG2A Hi all This is my daughters car,the battery light comes on and then the lights start flickering on and off and speedo goes crazy,I checked charging voltage at battery and it varies from 14.7 volts to 16.9 volts,replaced battery with known good one same results...	View
	2005 Hyundai Elantra GLS 2.0L Body Control VIN: KMHDN46D75 Hi Hyundia guys. This car has a bad ETACS Module. Will a used module work? If not will the new module need to be programed by the dealer? Thanks fo your help.	View
	2004 Jaguar XK8 4.2L No Start VIN: SAJDA42C24 Hello guys, I have a Jag here that's been plaguing us with problems over the last 6 months or so. Originally it was towed in with a no acceleration under load condition due to a failed fuel pump. Replaced the pump, all was good. About 3 months later it came ba...	View
	2001 Jeep Cherokee Sport 4.0L Airbag VIN: 1J4FT48S81 Hi Guys, Got this Jeep with the airbag light on. Could not communicate with the airbag module with 2 different scanners. I checked the CCD buss and it checked good. I replaced the air bag module and now have communication. I am now getting a code "Pressure sw...	View
	2008 Jeep Commander Limited 5.7L electric window VIN: 1J8H658248 Customer complained both front windows inop. Also radio wont shut off when door is opened and key is removed. Rear windows do work at the master switch, and the pass front window will work at the passenger door. Our scanner will not communicate with the driver...	View
	1990 Land Rover Range Rover 3.9L booster VIN: SALHV1243L when car left shop it would stop on a dime. after customer drove half day car came back with solid brake pedal but takes forever to stop like bad booster. brakes were bled according to manual and info from iatn archives. pedal feels good but will not stop safe...	View
	1998 Lexus GS400 4.0L engine This lexus was towed in with a no start complaint. battery dead, however owner says he cranked it for some time before calling for tow. Initial inspection while hooking up the charger showed an aftermarket positive batt terminal with a wing nut holding a stere...	View
	2007 Lexus GS350 3.5L Stall, Misfire VIN: JTHCE96SX7 Happy Easter to everybody, i have this GS350 with misfiring problem and stalling issue when trying to accelerate, smoke is coming out from the two exhausts because of the continious injection of fuel on injectors #1 & #4. The car refused to start after having ... Trouble codes: P0201 (Injector 1 open circuit), P0204 (Injector 4 open circuit)	View
	2004 Mazda RX-8 1.3L MIL Lamp on, VIN: JM1FE17324 Hey guys im new on this code P2004 APV Valve.. So im asking what should i expect when i removed this and make sure the valve is free.. I know there is a TSB that pretains to installing new parts and that should not be a problem but is there any thing i should ...	View
	1999 Mercedes-Benz CLK430 4.3L Limp Mode VIN: WDBLJ70G8X Swapped a 722.632 with a damaged center planetary , with a 722.604 from a 1997 c280. Had to swap bell housing and torque converter with drive shaft flange. I cleaned valve body and tested all sensors and actuators in valve body. From my understanding there sho...	View
	2000 Mercedes-Benz CLK320 3.2L battery VIN: WDBLK65G8Y hi everyone looking for some help here this car is killing tha battery very quick..when i check for a draw it has a 12v draw..i also noticed that the interior lights wont turn off...i pulled all the fuses 1 by 1 under the hood inside the car and in the trunk, ...	View
	2003 Mercedes-Benz C240 2.6L Hesitation, MIL Lamp on VIN: WDBRF61J83 Car was driven in, barely running, ran rough would not accelerate past 4000rpm, replaced MAF because of code cleared codes, and adapted, car still doing the same thing, disconnected MAF no change, fuel pressure almost 60 psi no change, disconnected both cats n...	View
	1998 Mercury Mountaineer 4.0L Poor Idle Quality, Hesitation, Surge, Cuts out VIN: 4M2ZU54EXW Vehiche starts fine, idles a little rough short term trims about 13 %, will drive at hiway speed but will not rwev over about 3000 RPM no codes,cuts out like starving for fuel going up hills, but O2 sensors are still switching and no lean codes, does not adjus...	View
	2003 Mercury Marauder 4.6L Cooling System VIN: 2MEHM75V43 Well, here it is. Can somebody explain the flow of coolant in this cooling system. I have no coolant getting to heater core. Mitchell has no info. The engine does not run hot or cold. Thanks	View
	1994 Nissan Altima GLE 2.4L No Start VIN: 1N4BU31D9R No spark condition, Tested all connections from igniter, distributor, to ecu all test OK. Had 2 old distributors, and had a car on shop which starts, tested all three, no go on this car. When I got the service manual took distributor out of place and started r...	View
	2003 Pontiac Vibe 1.8L C0210 Right rear speed sensor VIN: 5Y2SM62843 I got this car from another shop. They installed a GM new wheel speed sensor on the right rear to repair a code C0210. When driving this car the ABS applies with every stop until the ABS lamp comes on and the code C0210 sets. I have printed the trouble tree fo...	View
	2000 Subaru Outback Limited 2.5L 1-2 shift VIN: 4S3BE6869Y vehicle came in, new customer. coolant leak and trans, when warm looses all forward movement, but reverse still works. coolant leak was head gaskets. checked for codes, none found. pulled trans pan and found what looked like a gear tooth in the pan, and some s...	View
	1996 Toyota 4Runner SR5 3.4L MIL Lamp on VIN: JT3HN8696T Have already replaced knock sensors wiring harness and another used ecm what else could be causing these codes there is a small knock sound sounds like from the crank Trouble codes: P0325, P0330	View
	2005 Toyota Corolla CE 1.8L A/F Sensor VIN: 2T1BR32E35 had this customer come in with CEL on and code P0171 Af sesor lean Bank 1 replaced sensor with factory AF sensor got a phone call light back on scaned and have same code is there a reflash for this when I checked it the first time the sensor was switching real...	View
	2003 Volkswagen Passat GLS 1.8L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: WVWPD63B83 we smoked checked the intake system. the new vent valve diaphram was blown again. we replaced the diaphram again and it blew again. i found a collapsed vac hose to evap system. Does anyone know what would cause the vacuum vent valve to keep going bad? are the ... Trouble codes: P1136, P0171, P1111	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2008 Audi S5 4.2L Hesitation, Surge, Misfire VIN: WAURV78TX8 Thank you for the replies. Customer decided to take car back to dealer, under warranty, I am waiting to hear from him what the found. Had another car , same, come in and checked the engine oil cap for vacuum, was the same. So I believe these all must do it. Wi...	10
	2010 Audi Q7 TDI 3.0L Mil On VIN: WA1LMAFE3A Sorry for the late close, had some computer issues. We replaced the high pressure pump, car runs perfect. Thanks to everyone.	4
	1995 Buick Riviera 3.8L Poor Idle Quality, Misfire VIN: 1G4GD22K3S After making the conclusion that this car defies all logic i decided to remove the upper intake to check for any signs of damage. Once removed i did find that the egr tube didnt melt into the coolant passage like most but did distort the intake enough to caus... Trouble codes: P0740, P0171, P0131.	25
	2001 Buick LeSabre Limited 3.8L Engine VIN: 1G4HR54K21 Ok. First off the vehicle came in and customer was not able to leave it for any length of time, had to go to work, stated clearly in the request. We did a basic scan and found not codes and all monitors were enabled and ready, which we thought was strange due ...	24
	2000 Chevrolet Monte Carlo LS 3.4L engine VIN: 2G1WW12E7Y Thank you all for your help. I found the problem, it is the fuel injector that is bad. I am waiting on the customer to give the go ahead to fix it. I want to say thank you all again for your help.	60
	1998 Dodge Ram 3500 8.0L Oil consumption VIN: 3B7MF36W6W First off, I want to apologize for not proofreading and making everyone believe it had 11,000 miles- it is 110,000. Further discussion with the customer reveals it has had consumption increasing steadily for the last year. It pulls heavy loads such as anhydrou...	12
	2003 Dodge Ram 1500 Laramie 3.7L No Start, Stall VIN: 1D7HA16K13 Thanks for all the help! It turns out the new OE PCM was defective out of the box. Just got another one installed and all is well. The cam & Crank sensor could not be re-learned on this year truck. The DRB did not have that option. The ASD relay ground ...	12
	1993 Ford Explorer Eddie Bauer 4.0L No Start VIN: 1FMDU34X3P Thanks for all the replies, replacing the ecu fixed this vehicle, ecu was not sending injector pulse, vehicle had good spark, good waveform on ckp and cmp sensors, good fuel pressure, just wasn't getting any injector pulse, as we don't have a breakout box to p... Trouble codes: 211 (profile ignition pickup erratic), 214 (cylinder id circuit fault).	13
	2000 Ford Mustang 3.8L Excessive Emissions, No Start, Poor Fuel Economy VIN: 1FAFP4041Y Replaced the fuel with new gasoline, now car starts and runs fine. Thanks everyone	34
	2002 Ford Ranger Edge 4.0L Cuts out VIN: 1FTZR45E62 Well, I can not honestly call this one fixed yet, but, that is only because it has not snowed here in over two weeks. I did however build a sock for the air inlet under the air filter before the last snow. I have not heard from the customer since. I still am u...	18
	2003 Ford F-150 XL 4.6L Passive Anti-Theft System VIN: 2FTRF18W63 Hello, Checked all fuses and relays, OK. Checked for communication between PCM (PATS security system) Communication was fine with all modules. Did the reset for the PATS system, still no start. Located PATS wires behind cluster. Took apart cluster ...	8
	2005 Ford F-250 Super Duty Lariat 5.4L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1FTSW21565 thanks for the replies everyone. I found that the passenger side bank vct solonoid was bad. I was a little leary of this diagnosis but when I pulled the solonoid I found the screen missing and figured part of it was inside the sensor. I went ahead and replaced... Trouble codes: P0012 (Camshaft timing over-retarded bank 1), P0021 (Camshaft timing over advanced bank 2), P0300 (Random misfire), P0302 (Cylinder 1 misfire), P0303 (Cylinder 2 misfire), P0304 (Cylinder 3 misfire).	6
	2006 Ford F-150 XLT 5.4L Engine VIN: 1FTPX14566 I would like to thank everyone for their replies. They were very helpful and honest. There were a couple things that really helped me and the Carlot. One was the vin 5 5.4. He nor I knew there was a difference cause he just looks at the sellin price not the vi...	31
	1998 GMC K3500 Sierra SL 7.4L Poor Idle Quality, Cuts out, Misfire VIN: 1GDHK33J1W THANKS FOR AL [...] THE REPLIES, WE DID NOT FIX THIS VEHICLE , THE CUSTOMER (CAR LOT) DECICED TO TAKE IT BACK TO THE AUCTION,RATHER THAN SPEND MORE MONEY. THANKS AGAIN DANNY Trouble codes: P0302, P0304, P0141.	9
	2007 GMC Yukon XL 1500 SLE 5.3L rear lift gate VIN: 1GKFK16377 Thanks to all who replied. The problem was the switch in the handle on the liftgate. I thought the liftgate would open when the button on the remote was pressed but it only unlocks.	5
	2002 Hyundai Elantra GLS 2.0L Hesitation, Cuts out, Stall, Misfire VIN: KMHDN45D32 not fixed but I used up my updates, not sure why iatn only allwows one update. Any way what I found is that number 67 pin from ecu is dropping off and allowing ecm relay to open. My grounds are good. I ohmed and load tested the wire, tested good. Unsure if an...	6
	2011 Hyundai Sonata GLS 2.4L Remote door locks, clock, TPMS VIN: 5NPEB4AC8B Thanks everybody. I was super busy that afternoon when this vehicle left, and I guess I overlooked the simplest thing. Ended up being a blown fuse. In the IP fuse panel there is a yellow holder that has two fuses in it. Looks like it pulls out & hangs there to...	5
	1994 Jeep Cherokee SE 4.0L No Start VIN: 1J4FJ28S8R 1st thing thanks for all the help, as it turns out the 94 jeep 4.0 does need a cam sensor signal to start the engine, I'm taking a lot of guff for that as I thought that the early jeeps did not need a cam signal and we spent way too much time on this vehicle. ...	15
	1998 Jeep Grand Cherokee 5.9 Limited 5.9L Mechanical VIN: 1J4GZ88Z2W After taking closer look , we found the crankshaft pully is bad, install new pulley & the noise went away, thanks to everyone who took the time to help out	26
	2008 Mazda B4000 SE 4.0L No Start VIN: 4F4ZR47E78 So; I did get the truck in for further testing and installed an amp meter in place of the 30 amp fuse that powers the fuel pump and injection system. The meter read around 7amps most of the time and went as high as 11amps under prolonged heavy acceleration.The...	13
	2003 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBUF65JX3 well i installed 2 new oem rear o2s and cleared the code and the light did not come back on. so wish i would of but i dont not have the chance to measure amperage of the heater circuits but i did measure the ohms the the heater, both the new 02s were 9 ohms ea... Trouble codes: P2010 (p0138 o2 sensor 1/2 circuit high), P2083, P2083, P20C3, P20C2, P2009.	7
	2002 Nissan Sentra CA 1.8L Starting VIN: 3N1CB51D52 Hi all, thanks for all the help you guys gave. What actually happened was the Computer was not powering up, It was a coincidence that it happened when it came in for such a basic procedure. Getting the customer to understand that was and is VERY difficult.I go...	15
	2005 Nissan Maxima SE 3.5L Timing chains VIN: 1N4BA41E95 i believe this one is fixed. after inspecting the rear cover extensively. i got Nissan parts from the company that i got the aftermarket parts from. my secondary tensioners turned out to be not the updated parts with the oem they were updated. after talking to...	11
	1996 Oldsmobile Cutlass Ciera 3.1L right rear brake VIN: 1G3AJ85M6T Thanks for the help everyone. Noticed some ridges on the backing plate. Welded over and ground down, replaced with oem shoes. Looked good. Hope it holds up this time.	23
	2001 Oldsmobile Intrigue GL 3.5L engine VIN: 1G3WS52H11 Thanks for all the great info! We left pressure pump on cooling system on over the weekend, and the car did not miss fire when started, it still had 5 psi remaining on system too. Went old school, installed clear hose on heater return to thermostat. Gas bubb...	7
	2010 Pontiac G6 2.4L Stall VIN: 1G2ZA5EB2A ran injector wave form test and ck for spark all is well whent to put back together car started and ran fine put over seventy five miles on car ran like a top let customer take back called today and said everything was fine its never fun when a car stops perfo... Trouble codes: P0011 (Intake cam position system performance).	5
	1989 Toyota Pickup DLX 2.4L Surge, Poor Fuel Economy, low power VIN: JT4RN01PXK Thanks for all the replies. Andy was very helpful.We replaced timing chain and gears-no change. Finally tapped into o2 voltge at ecm and test drove- voltage would go to 4-5 volts indicating very rich condition. Gave the circuit a ground through my power probe ...	10
	1995 Toyota Tacoma DLX 3.4L Excessive Emissions VIN: 4TAVN73F9S Doug Mueller of TEC HELP in Concord suggested check these items as they relate to NOx. Timing, cooling, Lean mixture, reflashes, cold cat, too hot plugs, air leaks, tire size, even a "toronado" after market air 'swirler' placed in the intake effects nox. ...	6
	1995 Toyota Camry XLE 3.0L Engine electrical VIN: 4T1GK13E9S Replaced coil #6 and ECM Customer run about 2week from now without a problem. Thanks for all your help	23
	2001 Volkswagen Jetta TDI 1.9L Glow Plugs & Coolant Temp Sensor VIN: 3VWSP29M21 Ignition timing was off by 8 degrees. Instructions to adjust it are here (need a scan tool): Other areas checked were the fuel filter for a leak and the temp sensor. I have not figured out the temp sensor i...	12

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