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Prev Professional Automotive Repair Technical Discussions for May 14, 2013
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2006 Audi A3 2.0L Misfire, MIL Lamp on VIN: WAUMF78P26
Hello Audi/VW Techs. This A3 has a pattern of running rough and misfiring for about 30 seconds when cold, then it runs perfect all day. High and low fuel pressure are within specs. Coils have been updated. The interesting thing is that when it runs rough my re... Trouble codes: P0300 (p0301-), P0301 (p0303-), P0303 (p0304-), P0304
2000 BMW 323i 2.5L Starting VIN: WBAAM3348Y
Towed car in with complaint of no start. Customer stated someone put 2 stroke oil in his gas tank. He said he ran it almost empty than put in sea foam to clean it out. He said it would not accelarate then started putting out white smoke and stalled then would ...
2001 BMW 325i 2.5L Electronic VIN: WBAAN37411
Car came in and we extracted 2 fault codes.P0720-Stall speed and 049- Symptom, gear monitoring. Clear faults and drive car for about a mile. When you come up to a stop light comes on. We checked all solenoids and wire harness and all check out well.Pulled valv...
2005 BMW 645Ci 4.4L wipers, windows,horn VIN: WBAEK73415
car starts normally except starter stays on for 3-4 seconds after starting. then wipers go on and stay on,can't be turned off. all power windows inop. intrument cluster gauges inop. wiper fault displayed and electrical malfuction displaed. no horn. signals onl...
1997 Cadillac DeVille Concours 4.6L high idle VIN: 1G6KF5295V
High idle. TPS jumping around a good 1/10 volt (at idle or engine off) I assume this is what is causing the problem. Using a Tech2 the at idle reading bounces from yes to no constantly. I cannot even do a IAC control because it says its not at idle, unless i u...
1992 Chevrolet Camaro Z28 Heritage Edition 5.7L Starting
We have a 92 camaro.Hotter out side the more it is effected.If you drive for miles and stop for gas etc.Come back out and car will not turn over.If you jump from another car it will start or from a jump box it will start.Or if you let it set for 25 to 30 min i...
2002 Chevrolet Tracker 2.0L MIL Lamp on VIN: 2CNBJ13C72
vehicle came in for state insp and oil service, young tech noticed bad brakes, axle, and 2 tires, but failed to realize the MIL lamp did not light in bulb test. aarrrggh! Cut to the chase... mil bulb burned out (how many hrs "on" would that take?) Three codes ... Trouble codes: P0335, P0131 (O2 sensor sig low B1S1), P0442 (Evap Small leak)
2005 Chevrolet Silverado 2500 HD 6.6L Poor Idle Quality, Misfire, Black smoke VIN: 1GCHK23225
Customer had black smoke and runs rough previously and requested all injectors to be replaced. It might have helped the smoke some but i dont remember it being totally gone, although he was happy. On ford diesels black smoke isusually more of an EGr issue and ...
2005 Chevrolet Trailblazer LS 4.2L Blower motor electronic resistor block VIN: 1GNET16SX5
Vehicle has been back three times now with only high speed working. Each time I have found diode on control module to have failed. Replace module and find all to work normally. I am looking for sugestions as to what to test to see what is damaging these module...
2006 Chevrolet Equinox LT 3.4L Cooling Systems VIN: 2CNDL63F86
Thanks up for for any help, I have this 06 Equinox with the 3.4 that has coolant in the cylinders. Vehicle overheated, customer stated that for several days before the engine ran rough for a few minutes when first started. I filled cooling system with water & ...
2006 Chevrolet Avalanche 1500 LS 5.3L acuating on drive
truck came to me with the abs acuating on left turns,would not acellerate in turn,found right sensor dropping out,replaced hub. helped for turn hesitation ,still had straght accelleration hesitation(dead throttle -electronic type)checked abs pumpturns on on ev...
2007 Chevrolet Cobalt LT 2.2L MIL Lamp on VIN: 1G1AL55F97
Hello Guys, I replaced the engine for a dead cylinder on this cobalt. Now I'm getting a po411 which is telling me I have a flow issue with the air pump. After inspection for obstructions I replaced the air control valve selenoid. The code came right back. The ... Trouble codes: P0411
2001 Chrysler PT Cruiser 2.4L No Start VIN: 3C8FY4BB61
Could use a little heads up on this one on the schedule for tomorrow. 2001 Chrysler PT Cruiser has an intermittent no start-cranks OK. After sitting for a brief period car will start and run fine however does set the following codes-PO118-ECT sensor voltage hi... Trouble codes: P0118, P0123, P1193 (Air Inlet Temp Sensor Voltage High)
2004 Chrysler Sebring Touring 2.7L MIL Lamp on VIN: 1C3EL55R54
This car came from the auction with a new/used motor. Running poorly & dies at idle. Had p0171, p0174 and a rear downstream Oxygen sensor code. Found the intake gaskets leaking vaccum. Replaced the upper and lower manifolds due to warping and rear downstream 0... Trouble codes: P0171 (p0174-), P0174
2008 Chrysler Town & Country LX 3.3L Hesitation, Surge, Misfire VIN: 2A8HR44H48
This vehicle came in with a lack of power and hesitation under load. If you drive it at medium cruise or a light load the problem does not exist. The cam and crank have been scoped several times and good amplitude and signature with no drop outs. The ground an... Trouble codes: P0339 (Crankshaft Position Sensor Intermittent), P1128 (Closed loop Fueling Not Achieved Bank1), P0300 (Random Misfire)
1996 Dodge Caravan 2.4L Mil On P1495 VIN: 2B4FP25BXT
Hi, i have a 1996 dodge caravan and it has a code for a leak decition pump but the vehicle does not have a ldp. It has no signs of ever having one. Only thing it has for evap is a purge control valve that seems to be working fine.the wiring diagram shows the ...
2008 Dodge Avenger SXT 2.4L alarm VIN: 1B3LC56K48
This avenger came in with complaint of alarm intermitently going off when doors are locked. By alarm going off I mean horn and lights flashing. The vehicle has remote start. I found a TSB that fits the exact symptoms but the TSB only applys to dealer installed...
1990 Ford Bronco Custom 5.0L Poor Idle Quality, Stall VIN: 1FMEU15N4L
Truck has an issue ONLY when cold. Will start up, rpm gauge gets up to 3000rpm then will drop all the way back and not have time to idle. Will stay running if throttle is held down slightly. Removed IAC and intake tubing off throttle body. Lots of build up ins... Trouble codes: 31 (EVP circuit below minimum voltage), 32 (EVP voltage below closed limit), 81 (AM2 circuit failure), 82 (AM1 circuit failure)
1996 Ford F-150 Eddie Bauer 5.0L Poor Idle Quality, MIL Lamp on VIN: 1FTEF15N2T
Truck came in with a code [...] both banks had a ltft around -18.Fuel pressure was at 35psi at idle.Fuel pressure regulator vac.line was removed and found no leaks.Cannister purge vacuum line was blocked with no change to the trims.Ignition timing was adjus... Trouble codes: P0175
1997 Ford Ranger Splash 2.3L transmision spedometer VIN: 1FTCR10AXV
does not shift when the speedometer & odometer is not working which was intermittent but now there is no movement in the speedometer or odometer. Also some times turn signals and hazard flashers work intermittently until you bang on the steering column.
1990 GMC S15 High Sierra 2.5L Cuts out, Stall VIN: 1GTBS14E5L
When cranking vehicle the single tbi injector pulses on cranking and vehicle starts but as soon as you release key into run posistion the injector stops working and even though car starts it runs out of fuel shortly there after. If I ground the Blue (INJECTOR ... Trouble codes: 34 (low voltage to map)
2002 GMC Envoy SLE 4.2L Surge VIN: 1GKDT13S32
Now has same code and i believe that the actuator is stopped up at the screen, my question is on this model is there a special tool to replace the actuator or is it simply remove and replace change the oil and filter reset computer, also this has intermittent ... Trouble codes: P0014 (Cam accuator problem), P1345 (Cam crk corlation)
1996 Honda Civic DX 1.6L piston & rings VIN: 2HGEJ6342T
Do any of the Honda tech have experience with this engine rebuild kit offered by perfectengine.com (SAF-SEK1230 (Honda 1.6L D16Y7 Engine Rebuild Kit Civic CX/DX/LX 1996-2000) I the past I have purchased NPR pistons and rings from this company and had good re...
1997 Honda Prelude 2.2L Harmonic balancer VIN: JHMBB614XV
Customer called said belt came off. I found balancer bolt came loose and the key in good shape as well as crank mating surface,. After inspecting seating surface of balancer pulley, it almost looked like it had splines on it and it was worn some what smooth by...
2007 Honda Pilot EX 3.5L water leak VIN: 5FNYF18527
This is the second time right rear seat belt was replaced because of water rusting return spring on seatbelt. I have removed interior trim and trim on rear hatch and pressure washed the hole thing. Could not find any leaks.
1988 Jaguar XJS 5.3L Alternator VIN: SAJNV5848J
I have this relatively clean xjs that's charging at 13.2-13.3V. Alldata says 14.5 V. I rev the engine and doesn't change the output. It has the lightning bolt sign that is on very dimly but if I rev the engine, the light actually gets brighter. I'm assuming th...
2004 Jeep Liberty Sport 3.7L battery VIN: 1J4GL48K94
draw kills battery in 1-2 days varying draw from around 1 amp to 70 m-amps if you pull fuse 34 in junction box it drops to less than 7ma. put it back in and still good . cycle key and draw is back. circuit goes to courtesy lights, vanity lights, radio, and bcm...
2005 Land Rover LR3 SE 4.4L Unknown VIN: SALAA254X5
this vehicle has a roughness or rumble feeling in the seat when accelerating from a stop. It feels like a bad U-joint so I pulled both drive shafts and inspected all joints. found tight spots in several joints so I replaced both shafts with new from dealer. pr...
1996 Lexus ES300 3.0L Hesitation VIN: JT8BF12G7T
Hello Techs, I have this Lexus with 246k miles on it, customer states it was driving normally when suddenly it stalled, he started it back up and it barely started, pulled to the side and then barely made it to his work place which was only a few blocks away, ...
2006 Lexus GS300 3.0L ecm code p0037 VIN: JTHBH96SX6
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1987 Mercedes-Benz 560SEC 5.6L Stall VIN: WDBCA45D1H
this car came to my shop for a no start problem, performed DIO testing, found that the fuel pumps were weak, fuel pressure reading 23 pounds of fuel pressure. noticed this car has been sitting up for at least 2yrs, this is what the customer said as well, someo...
2002 Mercedes-Benz CLK430 4.3L ABS/BAS/ESP warnings VIN: WDBLK70G82
Fighting ESP/ABS problem on this car. Code C1401 high pressure return pump A7/3m1 open/shorted. Due to misunderstanding wiring diagram (was looking at wrong version), diagnosed and was supplied used ABS valve block, which didn't set code while stopped but faul...
1993 Mitsubishi 3000GT 3.0L compressor over pressure valve VIN: JA3BM54J5P
first, about a month and a half ago we replaced every component in the a/c system except for the lines and hoses evap core. customer came back last week very upset and frustrated with us about how she spent so much money on getting her A/C fixed and how now it...
2004 Saab 9-3 Arc 2.0L MIL Lamp on VIN: YS3FD79YX4
This 2004 9-3 came in with CEL on. Faults P1343 (Ionization Signal or Trigg, Coil 3 to CDM, Open/Short), and P0303 (Misfiring, Cylinder 3) present. Car ran fine. Checked plugs, ignition wiring with no evidence of problems. Replaced #3 ignition coil. Noticed co... Trouble codes: P1343 (Ionization Signal or Trigg Coil 3 to CDM Open/Short), P0303 (Misfiring Cylinder 3.)
2008 Subaru Impreza 2.5i 2.5L Hesitation, Misfire VIN: JF1GE61678
1 week ago we replaced Head Gaskets on this vehicle. Customer came back complaining of a hesitation from a stop. Its feels like a misfire, only happens under heavy accel...Well, we replaced coil, plugs and wires and the problem is still the same. I have checke...
2004 Toyota Land Cruiser 4.7L engine VIN: JTEHT05J24
Engine misfire p0300, all cylinders are misfiring but engine does not run that poorly, misfire counts are low . I checked mass air flow sensor with lab scope checks good. Engine idles smooth but stumbles once in awhile,
2000 Volkswagen Beetle GLS 1.8L airbag VIN: 3VWCD21C2Y
air bag light was on with code #01218 stored in the computer. description... side airbag igniter pass. side n200 sporatic value of resistance too great. removed seat back covers and pannels and inspected all wiring and connectors for dammage and chaffing from ...
2005 Volkswagen Jetta 2.5 2.5L Poor Idle Quality VIN: 3VWSF71K65
This car has 15" vac in crankcase,replace pcv assembly ie valve cover, same problem,plug feed to valve cover problem goes away,there is another portion of this pvc system located in oil filter housing, has anyone had to replace one of these? no other vac leaks... Trouble codes: P0507, P2279
2005 Volkswagen Jetta 2.5 2.5L No Start VIN: 3VWSG71K35
I need help with this jetta no power to fuel pump i can't locate fuelpump relay or fuse according to diagram there is a 15 amp fuse that i can not locate neither , check fuse box by the batt. and under dash those are the ones i found and relay box under dash ....
2007 Volkswagen Beetle 2.5 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWRG31Y27
Hello Everyone, I have a vehicle that idles rough and misfires when cold. After it warms up for about 45 seconds it run fine. We replace spark plugs and mass air flow sensor and that didn't help. I was wondering if someone can lead us in the right direction. W... Trouble codes: P0300 (Random misfire), P0301 (Cyl. 1 misfire), P0302 (Cyl 2 misfire), P0303 (Cyl 3 misfire), P0304 (Cyl 4 misfire), P0305 (Cyl 5 misfire)
2008 Volkswagen R32 3.2L charging light VIN: WVWKC71K28
Customer complains of an intermittant condition where the battery light will flicker on and off while driving. Tested battery and charging sytem ok at a standstill.performed voltage drop test at altinator and jumper post with no drop found.After driving for a...
2008 Volkswagen Passat Turbo 2.0L fuel system VIN: WVWUK73C78
vehicle was purchased from a customer with a blown engine ,,, installed a used very clean engine and used the vehicle for several weeks ,, car was idling outside shop and stopped ,, found the fuel module under the rear seat melted ,, changed module and fuel ...
1972 Volvo 1800 ES 2.0L Excessive Emissions, Poor Idle Quality VIN: 1836354003
r&r fuek and fuel pump,replaced fuel pump first and pressure was too high and ran rich,replaced fuel pum with lower fuel pressure and runs better but still feel rich.pinch fuel line some and engine smooths out.return line coming from fuel regulator r&r fuek an...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2007 Acura RDX 2.3L Cooling Systems VIN: 5J8TB18527
install New exhaust manifold & gasket & pressure the cooling system, all good, this exhaust is aluminum & has a coolant passage,,,
2004 Audi A8 Quattro L 4.2L cat VIN: WAUML44E84
Thanks for the help. Yes the motor needs to be dropped. However the owner declined repairs at this time.
1995 BMW 325i 2.5L Poor Idle Quality, Surge, Stall VIN: WBACB4327S
it was right where all data said it was just hard to see or feel the picture is a little miss leading on all data but now that i know its vertical is understandable it was on the rear portion of the plenum not part of the MAF or in the center much easier to s... Trouble codes: 77 (intake air temp sensor circuit), 7 (camshaft adjustment), 13 (02 sensor circuit), 66 (antitheift signal), 16 (rpm/tdc sensor).
2007 BMW 335i 3.0L dash VIN: WBABB73597
I stayed late shut off phone and traced battery cables and all connections and found nothing wrong. Voltage drops were all checking out. I shut the hood and there went the wipers on again with all dash lights. I opened and shut the hood again and now all ligh...
1997 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall VIN: 1G1YY22G4V
First let me start out by appoligizing for being a complete idiot and wasting everyone's time. Sometimes the simple things cost us dearly. This car has had a supercharger added to it. I left that out of the equation because I had looked at all the plumbing and...
1997 Chevrolet C1500 Silverado 5.7L timing cover? VIN: EHA735JSNK
Modified the timing cover and ripped the seal kit of it and used some really good rtv and and let it set for 24 hours and all is good now. Next time I'll buy a new cover from the dealer no more dorman timing covers for me. That guys for all your help.
2006 Chevrolet Impala LT 3.5L Highway steering VIN: 2G1WT58K86
Well guys, customer took vehicle and is planning on trading it in. Everything checked out good. No loose suspension or steering. Told customer steering rack may fix issue but wasn't going to be 100% sure on it. Thanks for all the input.
2006 Chevrolet Trailblazer LT 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNES13M56
The primary problem the vehicle came in for was poor driveability and multiple misfires. That was rectified by replacing the converter on the right side. It was an education to find that simply removing an oxygen sensor was not enough to allow the proper flow ... Trouble codes: P0016 (p0341-), P0341.
2009 Chevrolet Malibu LS 2.4L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G1ZG57B79
thanks to all! turns out the manifold was cracked due to cat being stopped up. also needed an upstream o2 sensor to fix fuel trims hence it now runs like a scalded dog. Trouble codes: P0011, P0013, P0014, P0101, P0300, P0420.
2003 Chrysler Sebring LX 2.4L transmission VIN: 1C3EL46X63
Thanks for all the help; but customer declined the repair after I found the PCM at fault. He was ready to scrap the car for any repair over $500 so I should have stopped diag after the first 3 hours! Thanks again for the wisdom
2004 Chrysler PT Cruiser GT 2.4L Misfire VIN: 3C8FY78G74
Thanks for the replies. The correct injector came in, the car is fixed and back on the road. No intake leaks and the back of the intake valves was surprisingly clean. I know these engines have valve issues, that's why I did the leakdown test twice. Both... Trouble codes: P0300 (random misfire), P0302 (cyl 2 misfire).
2009 Chrysler Sebring Touring 2.7L coolant leak VIN: 1C3LC55D59
Thanx for the replies. we were misinformed from our parts dept. in regards to the location of the freeze plugs. there are freeze plugs on the back of this block. that was the leak. it's fixed. thanx again glenn [...]
1998 Dodge Ram 2500 5.9L NO engine power
This truck is fix. I replace de ECM and the truck runs fine and has good power. Many techs point that ECM problem and Injection pump. At this time the reading on the Data line is 2.5 V. Thank you all for all the help. I hope this reading can help someone in th...
2004 Dodge Ram 2500 SLT 5.9L Poor Idle Quality
So, because of the potential cost of replacing the injectors, I decided to try for a more accurate diagnosis. I sent the truck to the local deisel expert who diagnosed the problem as the pressure control valve within the pump. After I authorized the repair, I ...
2006 Dodge Magnum SE 2.7L no speedo VIN: 2D4FV47T36
Thank you to all that responded! One of my techs sent out the request post. I believe everyone that talked about pinion factor resetting was probably correct. However, the dealer could not communicate through the DLC with the new ECM. They are replacing it und...
2009 Dodge Charger SE 5.7L starter,fuel injectors,alternator VIN: 2B3KA43T69
John and Gilbert were right on the nose with the WIN/WCM lockup. Although I had left the battery ground disconnected overnite to clear codes, I had never taken both cables off and touched them together to drain backup power supply to these modules. Vey easy fi...
1998 Ford Mustang GT 4.6L No Start VIN: 1FAFP45XXW
I received many good replies. A couple suggested checking a fuse in the Dist Box under the hood. I had already done so, but forgot to mention it in the post. Most of the replies reminded me I needed two factory keys (which I had) and to do the Parameter reset ... Trouble codes: P1260 (Theft Detected Vehicle Immobilized), B2141 (Non-Volatile Memory configuration failure - no PCMID stored in PATS. Reinitialization required probable cause is replaced PATS Control Systems B C only), U1262 (SCP network problem between PCM and PATS no messages received from PCM. PCM is not powered up or wiring issue with SCP circuits Bus Bus-. This is only a PATS fault if the Theft Indicator is flashing).
2003 Ford Crown Victoria 4.6L A/C compresor relay
Ok firt I want to tanks to all of you who take their time to help me posting all your knowledge ,all help me a lot . Ok I discharge the system replace the high pressure sensor. The one it's close to the compressor. Vacuum the system charge the system and wall...
1999 GMC Yukon SLT 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEK13R5X
thanks for all the replies, the compression loss issue we narrowed down to rings losing compression at the top of cylinder, vehicle held good compression at the bottom of the cylinder. customer declined further repair at this time. Trouble codes: P0302 (2 misfire).
2000 GMC Sierra 1500 SL 4.3L Starting VIN: 1GTEK14W4Y
Thank you all so much.Yes all fuses are good.As many suggested it was module problems.The pcm and bcm both quit when the battery blew up.Was looking for one thing and changed bcm first them pcm.Only when both were changed did it allow the security to relearn a...
1989 Honda Accord LXi 2.0L Excessive Emissions VIN: 1HGCA6281K
I back probe the ECU and verify correct sensor input including MAP,O2,ECT,BARO,IAT,EGR position and VSS(5 volt square wave). Power and grounds are present. I suggest an ECU replacement but with no guarantee. Customer decided to get a second opinion.
2004 Honda Civic LX 1.7L Itnermittent overheat VIN: 2HGES16574
Well brothers, the head is off, and warped nicely as one of you put it. Block surface is flat so we are selling valve job, pres test and surface. Also t-belt kit and water pump. I can't thank you guys enough for your insights into this head scratcher, no pun ...
2006 Nissan Maxima SL 3.5L Tcm VIN: 1N4BA41E86
Ok first of all thanks to all that tried to help. Top answer one persons question yes I was trying it with KOEO. To answer another no I did not end up needing a consult 2 to get this done. I am saying I have a glitch in the scanner I have now Snap on was here ...
1996 Plymouth Grand Voyager SE 3.3L ignition system VIN: 1P4GP44R6T
Unfortunately, we did not get the chance to go any further on this vehicle. The customer cut their losses before we could try any of these suggestions. Our next thing to test would have been the 02 sensors for a short as some of the replies recommended. Tha...
2003 Saab 9-3 Linear 2.0L Excessive Emissions, Stall, Poor Fuel Economy, MIL Lamp on VIN: YS3FB49S73
Thanks again to every one that helped us, Joseph from Washington talked about boost control solenoid, I almost replaced that, I had a volt meter on the signal side of the boost solenoid it would drop from 14.2 volts to 1.2 or 0 volts i noticed the O2 sensor s... Trouble codes: P0245 (charge air control valve open or short to ground), P0201 (Inj 1 circuit open or short), P0202 (Inj 2 circuit open or short), P0203 (Inj 3 circuit open or short), P0204 (Inj 4 circuit open or short).
2009 Saturn Vue XR 3.6L steering VIN: 3GSCL53719
my apologies for the late close. Most replies suggested that the rack was causing the binding. I also agreed and replaced the rack. when finished, the vehicle had almost NO power assist whatsoever. at this time we decided to replace the pump as well. New pump/...
2005 Volkswagen Jetta TDI 1.9L Excessive Emissions, Hesitation, Surge, Cuts out VIN: 3VWRT71K35
Good evening everyone This car is fixed. The main problem was the VNT actuator for the turbo. I found the help I needed from this post explained the the vnt valve moves too far and cau...
2006 Volkswagen Jetta TDI 1.9L Unknown VIN: 3VWGT31K76
1992 Volvo 960 2.9L Electronic VIN: YV1KW9507N
Ok, so this one is fixed. Speedo signal comes from the sensor in the rear axle which also supplies the signal to the ABS. The speedometer converts the signal to some other form which goes to the transmission computer. Its common for the wire from th...
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