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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 26, 2012
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for All Makes and Models
Help Request Answers
1992 BMW 325i 2.5L No Start, Poor Idle Quality, Cuts out VIN: WBABB1316N
Having trouble figuring out this E30. Vehicle was towed in with a customer complaint of the vehicle dying. Once car was in the shop I did the usual fuel pressure test and was checking the fuel pump relay and main relay when the vehicle finally started. It woul...
1999 BMW 540i 4.4L GPS Navigation VIN: WBADN5332X
The GPS Map on the screen does not reflect the position of the car. It even moves while driving, just about ten miles or more off position. I am assuming that the CD drive is working or I would not have a map on the screen and it moves with car movment. I was ...
1994 Buick Commercial Chassis 5.7L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire VIN: 1G4BR82P0R
Need advice. I bought this vehicle from a customer last summer because he brought it in for an occasional no start condition.It is a 1994 Buick Roadmaster Estate wagon 5.7L. I could never duplicate the condition except once and at that time there was no spark ...
1996 Buick Park Avenue Ultra 3.8L No Air Flow Out Of Vents VIN: 1G4CU521XT
customer came in for no air flow anywhere but defrost found broken vaccum line from the vaccum source repaired now i can get floor and defrost just no vents if i put vaccum straight to the blue vaccum line for vents it works like it should so i replaced progra...
2003 Buick Park Avenue 3.8L air blend doors VIN: 1G4CW54K03
having trouble with the blend doors not responding. hooked up scan tool and can actuate doors with scanner on both sides from hot to cold but doors will not respond by way of the control head. car has dual ac climate control the doors do not work on both sides...
1986 Cadillac DeVille Touring 4.1L engine VIN: 1G6CD6986G
vehicle came in with a rough idle. found worn cap/rotor,weak fuel pump.replaced those plusfilter and cleared lines. no change in performance. what is the injector voltage on these engines? any suggestions very much appreciated! Thanx, Jess
1972 Chevrolet Corvette 7.4L Unknown VIN: 1Z67W2S508
Hey guys, we are considering replacing the POA Valve with an updated unit that converts it to "Cycling Clutch" type system so we can use R134a. Have less and less people around here that can service R12 systems. Is there any thing else in the system that needs...
1991 Chevrolet Camaro Z28 5.7L starter
Hello guys, Camaro towed for no start condition - starter motor noisy. Other shop replaced 5.7L engine for 6.2L.After that cranking was slow and finaly got noisy.Removed starter and found all the teeth on drive broken.What I dont know is if the teeth were sim...
1999 Chevrolet Silverado 2500 6.0L ABS Module VIN: 1GCGK29U1X
the diagnostic tests schematic i did shows if voltage drops are ok to replace the ebcm. just wondering is 0.32 volts to much voltage drop.
2003 Chevrolet Express 3500 6.0L fuse# 23 VIN: 1GBHG31U83
Thanks in advance for any help. This is one of our fleet accounts, very clean cargo van with low miles. Came in on tow, died driving and no crank after. We found fuse #23 blown. Replaced fuse van started and ran for 2 days no probleme. Cust. picked up and afte...
2003 Chevrolet Silverado 1500 5.3L High idle VIN: 1GCEK19T13
Was at gm dealer...start truck up and idles to 3500 rpm...then shoots up to 6500 rpm...computer was flashed at the dealer
2005 Chevrolet Silverado 2500 HD 6.0L Timing chain VIN: 1GCHK29U75
Customer was turning off highway to secondary road, heard a "grinding noise" and engine quit. Would not restart. Our apprentice checked compression, found zero psi back four cylinders. Removing timing cover revealed broken timing chain. First question: If the ...
2010 Chevrolet Equinox LS 2.4L MIL Light VIN: 2CNALBEW0A
Hello IATN Members I Have a 2010 Chevrolet Equinox 2.4 With No Driveabilty Complaints But A Persistant P0010 Intake Camshaft Solenoid Circuit Code.I Suspect A Intake Solenoid Control Valve But Wanted to Know If Anyone Has Seen This.Engine Doesn't Appear To Be ...
1998 Chrysler Sebring JXi 2.5L Stall VIN: JC3EL5SH3W
I realize there is several threads in the past regarding this engine and its running issues, especially with the distributor. This one you can start up first thing in the morning, starts fine and will run fine for a minute or so. At a stop sign when you go to ... Trouble codes: P0300, P0301, P0303, P0306
2007 Chrysler Town & Country Limited 3.8L Sliding doors VIN: 2A4GP64L77
Sorry guys I hate to ask this before I get the car. I hope someone can shed some light on this problem before I see the car. I have some friends comeing through next week and if I need parts after I see the car I will not be able to get the parts on time.I hop...
1972 Dodge Challenger 5.6L engine
Test drove vehicle and heard some backfiring through the intake,misfiring, falling on its face accelerating from a stop. Did a cranking compression test and proved all cylinders were equal - manual gauge read 105. Engine vacuum was 9 inhg. Checked timing and i...
1991 Dodge W350 5.9L Injection Pump VIN: 1B7KM36CXM
I need to R & R this injection pump (it is a rotary style pump) I havent changed one of these type pumps and dont have any info on R & R on it. I have only changed the inline pumps. Is there any specific timing set ups for this one and any hints would help
2001 Dodge Ram 3500 5.9L Surge, Cuts out VIN: 1B7MC33761
Calling all Cummins guys. We have this truck that starts cutting out around 1500 to 1800 rpm's. Wont run much over 50mph even downhill. This was a trade in at our used car dealer, we are a Ford dealer so we have no history. We hooked a fuel pressure guage to t...
1989 Ford Ranger GT 2.3L Stall VIN: 1FTCR10A3K
Vehicle arrived complaint is stalls at stop lights intermittently. Occurs fairly regular vehicle loses spark. Will restart immediately and only does it at idle. Scope test crank and cam shaft position sensor at module nice clean square wave with no drop outs. ...
1994 Ford Ranger STX 3.0L No Start VIN: 1FTCR15U4R
This truck was brought to my shop after a customer installed these new parts. He also brought along the old parts. The distributor did have a worn driven gear. It appears that he has installed all the correct parts. This truck currently is a no start. It does...
1996 Ford F-250 XL 7.3L Po1728 VIN: 1FTHX26F5T
Hello all,i have just overhauled this e40d for blown convertor,trashed pump,and od snap ring popped out.now it has a reoccuring code 1728 that puts it into default.the solenoid pack was replaced a second time with no fix.the only thing i feel 'unusuall' is at ...
2005 Ford Expedition XLT 5.4L timing chain VIN: 1FMPU165X5
This vehicle came in with a serious rattle, which another shop had diagnosed as a bad right tensioner. I took the timing cover off, and did see that the chain was rubbing the cover. I replaced the chains, tensioners, and guides with aftermarket parts. When I s...
2007 Ford Edge SEL 3.5L ABS/Brakes VIN: 2FMDK39CX7
I've read as many of the posts I can find for this car, and have yet to fix it. We replaced the master cylinder, due to a fading pedal. I also replaced the 1 way check valve on the booster. The issue is, when you start the engine, the brake pedal is fairly sof...
2008 Ford Escape XLT 3.0L driveline VIN: 1FMCU93178
Customer complaint is that vehicle pops when u put it in gear or accelerate. If you are at idle and drop it into gear you don't hear it, if you then accelerate hard you get a clunk when you take off. If you hold at a fast idle and go from Rev to drive you also...
2009 Ford F-150 STX 4.6L Surge VIN: 1FTRX14W59
I've got 2009 F-150 after 10 mins of driving it starts a very faint surge right at 1250 1400 rpms it surges, I can duplicate this in the bay by brake torquing it, there are no codes, I check all through mode 6 the egr valve that i replaced 5600 miles ago is fi...
1993 GMC K1500 Suburban SLE 5.7L speedo/ transmision VIN: 1GKFK16K2P
We tracked down whats called the speed buffer module and when that is unplugged we have perfect ac signal when it is installed we completely lose the signal. of course no one has one of these as they have been discontinued and I went to the junkyard and got th...
1997 GMC K2500 Sierra SL 6.5L boost VIN: 1GTGK29F7V
Ok p0236 is the code. While i was relocating the (black, new in 2010) pmd i notaced there was no resistor chip inside there the harness plugs in, should there be one ? Also the truck shows 14 lbs of boost at idle and goes up to 18 at full throttle. I might be ...
2002 Hyundai Santa Fe GLS 2.7L MIL Lamp on VIN: KM8SC73D52
hello fellow diagnosticians, I got a Hyundai that's beating on me. 2002 Sante fe, all wheel drive with a p0501. according to alldata and hmas website, the analog signal starts at the rf wheel, then goes to the abs module. from the abs, it goes into the ecm. I ... Trouble codes: P0501
2004 Infiniti FX35 3.5L transmission VIN: JNRAS08U04
while driving on the freeway i notice the rpm's rising and the check engine light came on.A code P1730 was stored in the system.
2004 Infiniti G35 3.5L Srs VIN: JNKCV51F54
Car came in with SRS light flashing. Had code for open in drivers seat air bag. Checked for wiring issues, none found. Cleared code. Light stayed out for 2 days and 50 miles. After driving another day the light started to flash. Scanning with Mastertech showed...
2001 Isuzu Rodeo LS 3.2L MIL Lamp on VIN: 4S2CK58W11
replaced spark plugs with denso platinium and also with ngk iridium and no chance, checked the no. 6 coil for proper cylinder position.no vacuum leaks,no exhaust restriction,good fuel pressure Trouble codes: P0300
1995 Jeep Grand Cherokee Limited 5.2L Poor Idle Quality VIN: 1J4GZ78YXS
Customer came in with complaint of poor idle, feels like it is missing slightly. No codes in PCM. Smoked the crankcase and smoke coming out throttle body. Ran vehicle and found that crankcase is pulling a vacuum. Also found that the O2 sensor is reading .10 vo...
2005 Jeep Grand Cherokee Limited 4.7L Front Diff VIN: 1J4HR58N95
Hello everyone this jeep makes a grinding noise and it feels like it may be binding in the front when Iturn right or left at slow speeds. The noise seems to disapate at higher speeds . There is no noise when going straight.Also,once it warms up [about 3 miles]...
2000 Land Rover Discovery Series II 4.0L No Start VIN: SALTY1249Y
Help Landrover techs,am at a loss with this vehicle.Has no spark or injector pulse.Other tech in shop replaced the crank sensor because resistance value showed open circuit,Replaced sensor still will not start.Tryed another new Bosch sensor and can't get good ...
2008 Lexus RX400h 3.3L abs VIN: JTJHW31U78
hi guys This vehicle came in for an oil change we replaced the air filter and cabin air filter.We removed the vehicle from the bay and the maintence required lamp was on.The dash board says vsc needs diag.
1993 Mazda RX-7 1.3L Surge VIN: JM1FD3311P
HI MAZDA TECHS, we have this rX-7 that has a bad fuel temp sensor that came with a used motor. Car runs fine hot but not when cold, surges. Was wondering if a bad fuel temp sensor would cause any drivability issues? Or would it just set the ck engine light? I ...
1997 Mercury Villager GS 3.0L MIL Lamp on VIN: 4M2DV1118V
I am in need of advice and assistance on this vehicle. Since the mitchel manual shows and I can find only 2 o2 sensors, one before and 1 after the cat., I figure sensor 2 is after the cat. With koer, I have battery voltage on the bl/yel wire, and good continui... Trouble codes: P0136, P0141, P0325
1990 Nissan D21 2.4L Fuel Gauge VIN: 1N6SD11S3L
Hey, the fuel gauge isn't working and when checking the signal into the level sensor, we are getting an erratic voltage signal that ranges between 1 and 12v; up and down, all the time. When checking the fuel gauge in the panel, we are getting that same signal....
2000 Nissan Sentra SE 2.0L Poor Idle Quality, MIL Lamp on VIN: 3N1BB51A1Y
hello and thanks in advance. This sentra came in with a recurring P0171, set on every test drive. Bank 1 o2 was stuck 800mv (rich, which I don't get), but still stuck so we replaced it per the TSB EC02-002. Code never set over next 100mi, so we didn't pay muc... Trouble codes: P0171 (lean bank 1)
2003 Nissan Pathfinder SE 3.5L cluster lighting VIN: JN8DR09YX3
Got an oddball for you all. This truck came in with the complait of no cluster lighting and no radio or hvac light with the headlights on. With the headlights off we do have radio and hvac lights. The radio and hvac do work with headlights on ,just no display....
2003 Nissan Pathfinder SE 3.5L No Start, Stall, MIL Lamp on VIN: JN8DR09Y73
First, Occasionally, 1 out of 10 times this vehicle will not start when cranking either cold or hot. I checked fuel pressure and it is in spec and range is good running or cranking. When it does start it will idle fine after clearing fuel from cylinders. When ... Trouble codes: P1110 (Bank 1 intake cam advanced.)
1995 Oldsmobile 98 Regency Elite 3.8L stalls VIN: 1G3CX52K9S
vehicle was towed in about six weeks ago with cylinders full of coolant due to upper intake blown/burned at egr passage.installed new lower gaskets and upper intake manifold.car runs great,except it will intermittently die/stall.it restarts and will run fine f...
1997 Plymouth Grand Voyager LE 3.8L Trans VIN: 1P4GP54L2V
Replaced the neutral safety switch,the tcm and the solenoid pack.The van will stall when you shift it into gear and the indicator will not show a neutral as you shift past it.The customer claims that it will not have this problem if it is driven in the rain.If...
1995 Pontiac Grand Am GT 3.1L Multiple DTC's VIN: 1G2NW15M0S
Hello im having issues with this sweet pontiac, I had recently done headgaskets, with new plugs and wires. Been driving for about 300 miles now. Just the other day I went to take off and it felt like the trany was in 3rd gear, so I pulled it down to man 2 and ... Trouble codes: 86 (54 -), 54 (99 -), 99 (21 -), 21 (45 -), 45 (44 -), 44
2005 Scion xB 1.5L compressor VIN: JTLKT32495
Customer complained that at times, after driving 45 mph, the AC stops blowing cold air. On a test drive on 105 degree day, it worked fine, but suddenly it quit blowing cold, reached 119 degrees center vent. then, we checked pressures, something around 125psi o...
1994 Toyota Camry LE 2.2L Speedometer VIN: 4T1SK12E1R
Thanks in advance. This is the wifes car. coming home one day she says the speedometer stoped and the trans stoped shifting. Also the o/d light was flashing. Ive verified this. There are 2 codes. 63 and 42. Replaced the vss for the speedometer and no change. N...
1999 Volkswagen Passat GLS 2.8L Interior VIN: WVWMD63B0X
Vehicle came in with RF window inop. Found no comunication with passenger module through the ccm. Window will work from passenger side switch only as well as power lock for that door. Repaired 12 splice connections that had corrosion at ccm harrness dont see a...
2006 Volkswagen Jetta TDI 1.9L Cuts out, Stall VIN: 3VWST71K26
This car has been previously repair by another shop. They replaced cam, lifters and head gasket. The car starts and stalls after a few seconds of running. we traced down the problem to the alternator L line leading to the vehicle eletrical system control modul...
2009 Volkswagen Jetta S 2.5L MIL Lamp on VIN: 3VWJZ71K99
Hi guys this car came in for the same codes. We replace tbi and pedal position sensor adaptation done and we took it for test drive for one day before we release it. Customer took it and drove it for 40-50 miles and on the freeway it happen again no accelerati... Trouble codes: P0122 (throttle signal too low), P0222 (Angle Sensor 2 for Throttle.Signal too low)

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2001 Audi A6 Quattro 2.8L MIL Lamp on VIN: WAUEH64BX1
I will close this for now,owner will drive for now and plans to do cats.I could see in measuring blocks that the rear O2 heaters the off and on would fluctuate? I also see the flex band area in front of one rear cat was cut and replaced on one side, could that... Trouble codes: 16815 (Warm up catalyst band 2), 16805 (Warm up catalyst bank 1).
2006 BMW 330xi 3.0L suspension VIN: WBAVD33516
Well this car is finally back, and is now fixed! Thank you to everyone who took time to replay. Patrick nailed it. The source of the noise was the struts themselves. Easy to duplicate by rocking the shaft in the shock body once removed. Customer is happy and ...
1999 Chevrolet K3500 6.5L Excessive Emissions, Surge VIN: 1GBJK34F4X
Ok, I can call this one fixed, sorry for the help request taking so long to close. Customer decided to take vehicle and drive it until conditions became more constant, because previously the vehicle would just act up randomly on the road. Truck came back in wi... Trouble codes: P0219, P0226 (Accelerator pedal position sensor 3).
2007 Chevrolet HHR LT 2.4L Mechanical VIN: 3GNDA33PX7
Hi, I have not been able to get this customer to return with the car yet. However, the replies I received are as follows: 1. Apply power & ground to the solenoids and watch for movement, then switch and see if it moves back 2. Check with an ohm meter (But n...
2002 Dodge Caravan SE 3.3L shifting VIN: 1B4GP253X2
thank you to all fellow ATN members that took the time to guide me and yes all of you were right,I pulled the pan and found big chunks of debris,call the customer and we installed another tranny and the problems was solved,thank you again
2005 Dodge Ram 1500 ST 5.7L Stall, Misfire VIN: 1D3HU18D35
The truck is not fixed. The owner picked it up the day after I posted. He did'nt want to pay for diagnostic time. A few replies did not aply to this engine. My next step was going to be a smoke test and then pull the egr to check for leaks. This is an electric... Trouble codes: P0300, P0307.
1998 Ford E-250 Econoline 5.4L power steering pump VIN: 1FTNE24L6W
Thanks to all that replied, by the way when I said high quality a-1 cardoone pump I was being sarcastic I know everything they make is junk and don't understand why we still by the stuff, anyways I did open up the return system and run the vehicle to check for...
1999 Ford F-150 Lariat 5.4L transfer case VIN: 1FTRX18L2X
The truck finaly came back, customers other vehicle was down so he was driving it with just 2 wheel dr. I almost forgot everything I did to it but the fix ended up being the GEM MODULE, I put a new one on it programed it now it works fine,thanks for everybody ...
2004 Ford F-350 Super Duty XL 5.4L rt turn signal VIN: 1FDSF34L24
Thanks to all of you that replied to my help request. You guys got it right when you suggested it was the combo switch and it was. I tested the circuit and it was ok. I had already replaced the combo switch with one I found on the shelf but that one turned out...
2006 Ford F-350 Super Duty XLT 6.0L No Start, Cuts out, Stall, MIL Lamp on VIN: 1FTWW31P96
thank you all very much for the help in the diag. of this truck. the fix was the egr valve stuck open aprox. 1/4 in. i did get to record the ipr to go to 75% duty cycle and replaced the hpop because i did a oil leak test(air press. in the high press system) an... Trouble codes: P0404.
2008 Ford F-350 Super Duty XL 5.4L Misfire, MIL Lamp on VIN: 1FDWF36558
Finally found The problem with The pick up. One of the intake foulers has come apart and fell off. This is a 3 valve per cylinder system, (2 intake and 1 exhaust and 1 of the intakes has failed. I think it's raised more question for me instead of answers. The ... Trouble codes: P0303, P0316.
2008 Ford Taurus Limited 3.5L Temp too high VIN: 1FAHP28WX8
Thanks to all that repleied. The cause was a plugged radiator as most of you said. We cleaned previously through the fan opening and when I removed the radiator I could see where I sprayed not avery big area. I used engine degreaser 3 times and there were stil...
2004 GMC Sierra 2500 SLE 6.0L doors VIN: 1GTHK24U94
I got the door open and a new lock installed and all works well but still confused,a electric lock unit and no electric lock buttons for 183.00 dollars,why is that. Thanks to every one for taking the time to answer my post. I like the idea or a small light in...
2004 GMC Sierra 2500 HD 6.0L fuel gauge VIN: 1GTHK23U74
Thanks for the replies. It's not fixed but i'm pretty sure i know what's wrong. The owner failed to mention that a transfer fuel tank in the bed of the truck was installed recently. What i discovered is someone also jumped the 2 wires going to the sending uni...
2001 Lexus GS300 3.0L Abs VIN: JT8BD69S81
Bosch battery tested gave me the wrong testing info. Alternator tested good wit the Bosch battery tester but Indeed the alternator is bad. Replace alternator with a Denso unit fixed the problem. Voltage would spike and cause ABS module to freak out. Next ...
1998 Mazda 626 DX 2.0L No Start VIN: 1YVGF22C9W
2001 Mercury Sable LS Premium 3.0L No Start VIN: 1MEFM55S71
Sorry for the late post..had to find a locksmith that programed the anti-theft module. Thanks for all of your input. I scoped the cam and crank signals. found the crank signal weak/intermittent. replaced sensor and now the screen is black with signal must have...
2004 Nissan Titan LE 5.6L air bag VIN: 1N6AA07B04
I believe the vehicle is fixed, at least I have not heard differently. I replaced the right seat belt assembly. So hopefully it is fixed. I want to especially thank John from TX for corresponding off list with me. The recall for that code was for the king cab...
2004 Nissan Xterra XE 3.3L A/C Compressor & Low pressure hose VIN: 5N1ED28T84
I'm going to close this one. The customer has not returned with the vehicle for further testing. First off the vehicle has 176,000. The A/c compressor would not shut off while I was testing it at the time when the line would freeze. The customer did state at t...
1995 Pontiac Grand Am SE 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Poor Fuel Economy, MIL Lamp on VIN: 1G2NE55M3S
The vehicle is finally fixed. Was not able to work on it for a while due to higher priority work. GM hotline suggested replacing the ignition switch. Said it was a common failure for this type of problem. I had already checked all related circuits but replaced... Trouble codes: 13, 21 (Oxygen sensor tps), 36, 41 (24x signal est line), 44, 45 (Lean rich), 74, 75 (A/c pressure egr), 85 (Prom error), 98 (Invalid pcm program).
2000 Pontiac Grand Am SE 2.4L cranking VIN: 1G2NF52T5Y
Should always check the basic stuff first.When the owner called to see how her car was doing she asked if I would check the A/C because it started making noise after her boyfriend tried to recharge it,needless to say he locked up the compressor so I pulled the...
2000 Pontiac Grand Am GT 3.4L Cooling Fans VIN: 1G2NW12E1Y
Well the first used ECU I got was bad. Engine started, fans seemed to work properly but the gauges in the dash didn't work! Second ECU I got, the gauges all worked but the engine would not start. Turns out I just had to reset the security system. Turned th...
1989 Porsche 944 S2 3.0L torque tube/shaft VIN: WP0AB294XK
The torque tube was the noise and we were able to replace it without too much trouble. I would say 10-12 hours is about right to replace the tube. The Trans has to come out and then the rear torsion arm assembly has to be lowered to get the tube out of there. ...
2007 Saab 9-3 2.0T 2.0L Starting VIN: YS3FD49Y47
"FIX" is relative. The used car dealer that created this mess by installing a used CIM was happy that we made the car drivable. Note: the dealer did not tell us that the CIM (Column Integration Module) was used. I retrospect, trying to get the vehicle to sta...
1998 Toyota Tacoma DLX 2.7L Over Heating VIN: 4TAPM62N0W
Well I tried the aspirin trick Tstat crushed them Tried the air lift did not work So I finally drilled a 1/4 inch hole in the tstat and no over heating runs at 170 Iam going to try and 1/8 and raise the temp a little Thanks for all the suggestion
2002 Toyota Celica GTS 1.8L low performance VIN: JTDDY38T32
Removed the front of the engine, removed timing chain, reset using the yellow marks on the chain and everything ended up fine. I should have paid closer attention when I first disassembled. Thanks for all the help.
2001 Volvo S60 2.4L Noise VIN: YV1RS61R01
Thanks all for the replies. The noise in the rear of the vehicle was the rr shock. Even when taken out could not hear or feel anything wrong with shock but obivously there was because noise is gone. LF strut was removed again & I replaced upper pivot on top of...
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