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Prev Professional Automotive Repair Technical Discussions for January 20, 2015
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Open Help Requests for All Makes and Models
Help Request Answers
2001 Acura TL 3.2L Poor Idle Quality, Hesitation, Misfire VIN: 19UUA56701
Engine misfires on cylinders 4,5,6 Which on this engine is the front 3 cylinders. No Check engine light no codes. The problem only happens intermittently right after cold start up and for a few seconds after hot soak. The Engine runs perfect warmed up and afte...
2003 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA56623
this car will randomly misfire on all cylinders at an idle. It seems mostly on cylinder #2 but other cylinders will also miss just once like every 15 seconds. fuel trims look good. looked at intake valves when I had intake off to see if all carboned up but loo... Trouble codes: P1399, P0301, P0302, P0304, P0305, P0306
1998 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52KXW
Customer was told that he need 2 02 sensors 1 code for heater circut other for not enough switching Same issues will not go in to closed loop always shows lean on scanner with no crosscounts sensors stay at a short range of switching 241 on one 432 on other. c...
2007 Cadillac DTS 4.6L MIL Lamp on VIN: 1G6KD57Y17
Customer came in with mil light on, pulled code p0411 air injection incorrect flow. Test pump for activation, none. Removed hose between pump and solenoid, full of water. Replaced both pump and solenoid due to water intrusion. Clear code and returned vehicle t... Trouble codes: P0411
2008 Cadillac Escalade 6.2L Mechanical VIN: 1GYFK63828
This truck came in with #1 cylinder misfire. We checked normal ignition & fuel, then checked compression. Had very low (10-30 psi) cyl #1. Pulled valve cover & found intake rocker not moving. Looks like lifter blew apart. Removed cylinder head to inspect lifte...
1996 Chevrolet C3500 Cheyenne 7.4L No Start VIN: 1GCHC33J6T
Hi all, Truck came in no start with a P0340 code. Customer said truck died on the freeway and wouldn't start. Pulled distributor cap (great location too ugh) and saw that rotor had came loose. One of the screws that hold the rotor down had somehow broke off in... Trouble codes: P0340 (Cam position sensor)
2004 Chevrolet Silverado 3500 6.6L No Start VIN: 1GBJC39224
I have 2 concerns with this truck. First one is the driver accidently filled the fuel tank with off road fuel. I know this fuel has higher sulpher content. Will this harm the truck in any way or is it safe to run the fuel out and refill with on road fuel? The...
2004 Chevrolet Impala LS 3.8L Heater Inop VIN: 2G1WH52K04
This car came into the shop cause the blower just stopped working had one of the techs drop cust off and started working again i did some digging and found that the ignition switch were common for this problem so i put one in and then started up and still no b...
2001 Dodge Ram 1500 Van 3.9L No Start VIN: 2B7HB11X61
no start intermittent when does not start, ASD relay anf FP relay buzz.when cold and sits for overnight, will start and idle smooth when engine warms up shift to drive and engine cuts out and relays begin to buzz.
2004 Dodge Ram 1500 ST 4.7L Stall VIN: 1D7HU18N34
Have a dodge ram here that just dies intermittently, doesn't run bad idles great its like somebody turns the key off . when it dies the tach will still show rpm for a few seconds and then the gauges reset and do a bulb test then the truck will restart fine. ch...
2005 Dodge Dakota ST 3.7L lifter tick? VIN: 1D7HW22K55
this truck ticked very loud, esp on decal, determined to be rear , pass side. replace lifters (1 collapsed) rockers look good, springs good. put back together. is better but not gone! is there a problem w/ oil pressure. sounds fine until warm, then on decal it...
2010 Dodge Journey R/T 3.5L MIL Lamp on VIN: 3D4PH6FV3A
Car came in last week for LOF and gas cap light on. Replaced gas cap. Had a hard time clearing light. Had to go into system tests for Evap system. Finally light cleared but not sure why. Anyway, Car is back with Gas cap light on plus a check engine light. Perf...
1996 Ford E-350 Econoline XL 5.8L no communication VIN: 1FTJE34H7T
Hi guys i have a van with no communication at the DLC connector. i have checked all power and grounds at the DLC and i have battery power only but no continuity on any of the other wires so i ran all new wires to the grounds and communication lines but still c...
2003 Ford F-350 Super Duty XLT 6.0L No Start, Poor Idle Quality, No Power VIN: 1FTWW33P93
I'm hoping you guys can help dig me out of this one. This is the first 6L Ford that I have really been into, and I am having trouble getting it running right after new heads were installed. This will be a long read! When truck arrived early December 2014, ...
2005 Ford F-150 FX4 5.4L No Start, no crank VIN: 1FTPX14555
have this truck that was towed to our shop,customer states he was driving and it just shut off,it has power to inside of truck and to the obd connector.when you turn the key on the throttle body humms very loud and the truck will not crank. if you unplug the t... Trouble codes: U1950
2005 Ford F-250 Super Duty King Ranch 6.0L No Start VIN: 1FTSW21P95
Vehicle towed in as a no start. Customer says it ran fine, parked in driveway & would not start next morning. Checked engine oil level - full. Scanned & retrieved codes. Scanned data - ficm voltages good at 47. Ipr @ 85%. Icp psi 355. Removed ipr & found scre... Trouble codes: P0046 (turbo/supercharger boost solenoid circuit performance), P0231 (fuel pump secondary circuit low), P0403 (EGR circuit fault), P0480 (cooling fan 1 control circuit), P0623 (generator lamp control circuit), P2285 (injector control pressure sensor circuit low)
2008 Ford F-450 Super Duty Lariat 6.4L No comm can bus line VIN: 1FTXW43R98
Iím going to try to give you all as much information as I can at the same time without writing a novel. I am working on this 2008 F450 diesel automatic 4 door dually with a can bus no communication issue that was brought to me from another shop. Again the shor...
2009 GMC Acadia SLT 3.6L Electronic VIN: 1GKER23DX9
Vehicle back with same exact issue
1998 Jeep Wrangler Sahara 4.0L no crank VIN: 1J4FY49SWW
Jeep has a no start. A dealer tech helped me with the proper wiring diag..go here for a look..= 1&t=visible&i=1&sr=12&sb=%[...]%5D%20DESC&s=1&rb= My question--pin 2 of the pk/neutral safety switch goe...
2007 Jeep Grand Cherokee Laredo 4.7L Abs Module VIN: 1J8HS48P57
My customer says when his wife enters his driveway. The brake pedal will fade and recover quickly.To enter the driveway there is a dip a turn and up a incline and she does this at fairly good speed.I have inspected the brake system and have found nothing.I can...
2002 Lexus RX300 3.0L Unknown VIN: JTJHF10UX2
Evening Techs This is a new customer, only history on this trans is that about a year ago,the fluid got so dirty that the vehicle wouldn't move. had trans flushed and it had been working fine until about two days ago. On light throttle the 2 3 shift will slip...
2004 Lexus ES330 3.3L lower control arm VIN: JTHBA30G04
This vehicle has 115k miles... a popping sound when driven over any minor bump and sharp turn. Both left and right side lower control arms have been replaced and struts and mounts inspected and disassemble... both are original struts.. rack is tight along with...
2001 Mazda MPV DX 2.5L Hesitation, Surge VIN: JM3LW28G81
Customer dropped vehicle off with suspected transmission shifting issues. Road tested without feeling anything abnormal aside from a bit of a surge. Upshifts, downshifts, TC lock-up and unlock all functioning properly. Rolled back to the shop, rechecked trans ...
2002 Mercedes-Benz ML320 3.2L lacks power VIN: 4JGAB54E82
This vehicle came in with what I thought was a simple problem. Someone had installed the engine cover wrong and pushed the baffle hose off of the intake creating a large air leak. after installing the hose again and clearing faults it ran smooth again but, on ... Trouble codes: P203D
2003 Mercedes-Benz ML350 3.7L Spark/Fuel VIN: 4JGAB57E83
Have a bit of a strange one here and hoping some one else has run down this path. This is usually the case with quirky issues. So I installed a crank sensor on this ML about a month ago and a week or so later it was towed back as a no start. I was a bit surpr...
1996 Nissan Altima GLE 2.4L Excessive Emissions, MIL Lamp on VIN: 1N4BU31D0T
Need help on this one. No vacuum leaks found,fuel pressure is normal,replaced front o2 sensor,maf sensor and computer but no difference. After it gets hot, front o2 sensor reads o volts and pollutes lots of co. Rear o2 sensor reads 800mv while front one reads ... Trouble codes: P0171
2006 Nissan Pathfinder LE 4.0L MIL Lamp on VIN: 15N1AR1846
Car came in the shop with CK engine light on we found code P2A03 we smoke test intake didn't see any leak we CK for exhaust for leak and that was good we inspect the wire harness and ground we CK wire from the PCM to the sensor and that was good so we R/R the ... Trouble codes: P2A03
2003 Pontiac Grand Am SE 3.4L Security Light VIN: 1G2NF52E13
Hello thanks in advance to those who have any thoughts on this!my customer went on vacation for a week,and when she got home and tried to use her grand am,she said that when she went to start the car and headlights,dash lights,overhead light all st...
2008 Saturn Astra XE 1.8L variable intake VIN: W08AR67158
Hello again, 2008 SATURN ASTRA 1.8 came with the code P065E - variable intake signal. No driveability issues, flap, bellows moving freely, we can reset it but code pending returns in minutes. We are not experienced with GM products, no suitable scanner for 2 -...
2009 Smart Fortwo Passion 1.0L transmission VIN: WMEEJ31X29
This Is My First smart Car, Bear With Me. Came In With ABS Problem, Rear Reluctor Broke, Replaced Right Rear Axle. Now When You put It In reverse Or Drive It Clunks 2or3 Times Then The R Or D Flashes, Looked On The Net And Tried Relearn By disconnecting Batter...
2006 Toyota Camry XLE 2.4L Keyless Entry VIN: 4T1BE30K16
This car came from another shop with the keyless entry not working with new transmitters. Customer has tried programing old and new transmitters. Could not communicate with module. Checked powers grounds and fuses. Replaced module. Now the wipers will not shut...
2007 Toyota Prius 1.5L dashboard
hi techs i ve got this toyota prius its the first one that im working on and its driving me nuts already he he,the owner left it garaged for a while and when he went to start it well u guessed it the 12v battery was flat so i went and put it on trickle charge ...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2003 Audi Allroad Quattro 2.7L Oil Sensor Warning VIN: WA1YD64B13
I really thank Peter from Lesotho and Bill from Florida so much for taking the time to set me straight. I must have been tired yesterday and got it mixed up - power comes from the S#5 - a 10 amp fuse which is on the driver's side of the instrument panel fuse ...
2005 Audi S4 Avant 4.2L Steering Assist VIN: WAUXL68E95
Thanks to all that replied. The fix turned out to be a worn out pump. When we lost assist it was in both directions. Revving the engine up would bring it back sometimes. It is possible that the relief valve was sticking. We didn't want to take any chances,...
2006 Audi A4 2.0L temp reading VIN: WAUDF78EX6
it is fixed,Dusan had the same issue and a new temp sender fixed it.I completely understand the workings of a cooling system,but I knew sinse I replaced the thermostat with a factory unit with no effect,that it was probably a measurement issue.thanks for the...
2008 Audi A4 Quattro 2.0L MIL Lamp on VIN: WAUDF78E08
Thanks to all who took the time to read through this post and help me on this. I ended up stepping back and breaking this system into 3 parts, hydraulic, electrical and mechanical. I was able to cross off the electrical by applying power and ground to the sole...
2000 BMW 528i 2.8L Heater VIN: WBADM6344Y
1996 Buick Regal Custom 3.8L Locks, Dome Light VIN: 2G4WB52K0T
Thanks for all the help! It turns out that you were all on the right track. The car is not a flood vehicle, but the body control module had been wet in the past, and had corroded the ground in the main wire connector inside the housing. Replaced the BCM and sp...
2006 Buick Lucerne CX 3.8L No Start, no crank VIN: 1G4HP57206
Thanks for the replies, I checked each suggestion to no avail. I contacted Identifix about the specific circuits in SP300, Alldata only indicated that each of the 3 lines were connected to the GMLAN not which components specifically. The line that fed to the i... Trouble codes: P1629 (Theft Deterrent Fuel Enable Signal Not Received), P1819 (DTC P1819 Internal Mode Switch - No Start/Wrong Range).
2008 Chevrolet Impala LS 3.5L speedo jumps VIN: 2G1WB58K78
I got an answer from GM tech - BCM is hub for all Communication - they said to clean & lube all plugs @ BCM & cut off zipties cinching wires together at plugs - car has been good for7 days so far - no SES light - no speedo jump!
2005 Chrysler Pacifica 3.5L Stall
Sorry about not being prompt to respond, I did install a dealer new PCM, program flashed and test drove with normal drive and relearn cycle. All good, ran good, no EGR codes. all monitors set and no issues,,, was a risk but it payed off! Trouble codes: P0403.
2011 Ford Focus SEL 2.0L Temperature VIN: 1FAHP3HN8B
Thank you all for your suggestions. It was 10 below Monday morning, perfect for testing. I clamped off upper radiator hose to make sure no coolant was circulating. I would get temp to middle of gauge(outside with radiator not circulating). Then I turned heat o...
2011 Ford Expedition XL 5.4L Battery VIN: 1FMJU1G59B
Well, I guess you'd call this one sorta fixed. Maybe. I went through every single circuit I could on this and determined that the roughly .055 - .060 drain was the result of all the modules contributing just a little bit to get to that point and was never able...
2004 GMC Envoy SLT 4.2L Engine VIN: 1GKES16S54
Well, sorry it took me so long to respond to this. I removed the intake camshaft and found that the head shop had broken off one of the cap bolts. Their fix was to punch the broken stud in farther, heli-coil and use the same broken bolt. I had about 3 threa...
2008 Lexus RX400h 3.3L No Start VIN: JTJHW31U28
A lot of replies were about one coil failing causing a start and stall with no restart. Right on the money. Pulling one coil wire at a time and watching the signal voltage drop is the key to finding the bad coil. It figures, mine was in the back!! It was also ... Trouble codes: P0351 (Ign coil A primary/secondary ckt), P0352 (b), P0353 (c), P0354 (d), P0355 (e), P0356 (f).
2003 Mazda 6 i 2.3L Poor Idle Quality, Surge VIN: 1YVFP80CX3
Owner gave the go ahead and turned intake cam.Cam was off. lined both cams up runs good know.Thanks For the help. Trouble codes: P0340.
2003 Mazda Protege ES 2.0L Misfire VIN: JM1BJ22593
Thanks to all that replied. I believe that the cause of the electrode bendage is loose screws coming from the intake like many of you have suggested. Customer did not want to pay for removal of intake to confirm. He was happy with a plug gapping. Not the resul... Trouble codes: P0304.
2003 Mitsubishi Lancer ES 2.0L No Start VIN: JA3AJ26E43
thanks to everyone. turned out to be the black yellow wire was broken at the 15 pin connector just inbord the fuse block
2008 Nissan Versa SL 1.8L Warning buzzer VIN: 3N1BC11E68
We decided to look at the main body harness. It had been wet once we cleaned and dried it. Took care of the problem also cleaned the sun roof drain tubes which caused the problem. We hope this helps somebody else.
2006 Volkswagen Jetta TDI 1.9L Stall VIN: 3VWDT71K96
WOO HOO! He called me back today to say that he hasn't had a problem since we put the new fuel filter in. I can only assume that there was a problem with the other filter or the sealing rings inside. I was -15 C on the weekend and he did not plug in the heater...
2008 Volkswagen Jetta SEL 2.5L hydraulic VIN: 3VWRM71K48
Thank you for everyone that responded. I ended up giving the customer the car after reading that this is somewhat normal. I did receive a posting from Allan that he had a similar situation. I was waiting to here what he came up with. I did have another vw in t...
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