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Prev Professional Automotive Repair Technical Discussions for January 22, 2015
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1995 Chevrolet Camaro Z28 5.7L egr system VIN: 2G1FP22P9S
Vehicle failed emission test with high Nox but CO and HC are good. checked EGR system first and found EGR valve does not get right vacuum signal from the solenoid, after further check found ECM ground momentarily the EGR solenoid (just for one second) and shut...
2000 Chevrolet S10 4.3L misfire VIN: 1GCDT14W1Y
truck came in to shop with p0300 random misfire.pulled plug wires one at a time and left cyl 5 and right cyl 6 rear both dead.had spark at cap to wire.runs on four cyl.plugs were not wet with gas so i put in spider injection and still have misfire.any help ple...
2007 Chevrolet Malibu LS 2.2L fuel guage VIN: 1G1ZS57F87
this vehicle was brought in by used car lot.when ign turned on speedometer needle quivers for about 4 seconds stops quivering and gas gauge goes to 3/4.turn key off to exit vehicle speedo needle quivers for a few seconds and stops quivering.they put a fuel sen...
1996 Dodge Dakota 3.9L No Start VIN: 1B7GL23X7T
auto came in intermitted stall. would start right back. found code for ign. coil. replaced coil code never came back. also found alt. not charging. replaced alt. checked good now. customer took auto came back saying no start and sometimes starts and stalls. ra...
2001 Dodge Dakota Sport 4.7L Transfer Case VIN: 1B7GG2AN71
This Dakota is electric shift 4X4, it will not shift as commanded. It has a 3-position dial (2WD, 4HI & 4LO) as well as a neutral button. When attempting to shift, the light for the desired range just blinks, it never shifts, or even tries to shift. The TCCM d...
2002 Dodge Caravan SE 2.4L Throttle Position Sesor/Transaxle VIN: 1B4GP25B62
Hello everyone and good morning. This post is DEFINITELY for someone that has run into this problem or has seen it before. I looked on IATN and the ONLY possibility I have seen is a post from someone that said they replaced oxygen sensors to fix it. How they f...
2005 Dodge Ram 3500 SLT 5.9L MIL Lamp on, Derate VIN: 3D7LS38C05
New customer. According to customer, He bought truck used from a dealer, The dealer had reflashed ECM and put in one new injector. After some problems he had an independent shop pu on new injectors and tubes. While driving, occasionally the MIL and the wait to... Trouble codes: P1222 (Excessive fuel return.)
2006 Dodge Ram 3500 ST 5.9L Noise in transmission VIN: 3D6WX38C96
This truck has a scratchy noise in neutral with clutch pedal up push down stop input shaft turning no noise, how ever if wheels are turning the noise stays in neutral clutch pedel up or down. Noise also in Rev,2nd 4th 6th. No noise at all in 1, 3rd or 5th gear...
2007 Dodge Ram 3500 ST 6.7L 5th gear VIN: 3D6WH48A77
This truck has the AS68RC Aisin Trans. It came in with several clutch packs wiped.Customer was running a programmer and we assumed the packs were wiped from to much torque.We rebuilt the trans and now it shifts fine but we still have trouble with K3 slipping i...
2007 Dodge Caliber SXT 2.0L Final drive VIN: 1B3HB48B97
Hello fellow techs and thanks in advance for your valued input. My customer experience a loud grinding noise which was loud enough to send shivers down your back. Kind of like fingernails on a chalk board! The loud noise went away but now there is a growl. On ...
2004 Ford Escape XLT 3.0L Misfire VIN: 1FMCU03174
Thanks in advance for any help on this one. Initially we only found a p0300(random misfire) code set in computer memory but engine was running with a misfire. Engine compression tested at 180 psi on all cylinders. Injectors tested at 13.2 to 13.7 ohms on all c... Trouble codes: P0301 (Cylinder 1 misfire)
2004 Ford F-350 Super Duty Lariat 6.0L engine VIN: 1FTSX31P74
vehicle came in with no power,rough idle, engine will eventually stall and restart in 10 minutes. codes for skip in cyl.5 ,7. egr code, cam sensor code in history. customer had replaced both fuel filters recently. Injector kill test with solus revealed #7 was ...
2006 Ford E-350 Super Duty XLT 5.4L Roll stability control VIN: 1FBSS31L06
Hello everyone, got a new problem child in the shop. originally came in with a dead battery and a service RSC system now message, ABS light, and traction control light. First codes revealed an internally shorted PCM. Replaced bad battery. Customer didn't have ...
2006 Ford F-250 Super Duty XLT 5.4L Electronic VIN: 1FTSX21576
Clicking behind drivers side dash when put in reverse or drive. Have not been able to figure out what is causing the clicking. Has anyone had a similar problem?
2006 Ford F-350 Super Duty XLT 6.0L Starting VIN: 1FTWW31P76
The engine in this truck was removed to further investigate the the limited rev range. It was thought that there may be some damage to the reluctor wheel on the crank. This proved not to be the case. Engine reinstalled but now have a no start situation. The en...
2007 GMC Sierra 1500 WT 5.3L Excessive Emissions, MIL Lamp on VIN: 2GTEK13M57
MAF replaced with harness smoked intake-found no leaks come off idle fuel trims are great- idle engine long term go high short term are perfect. gotta have a vacuum leak somewhere!!! pulled upper intake manifold -found gaskets were deformed. problem still ther... Trouble codes: P0171 (p0172-), P0172 (p0449-), P0449
2004 Honda Odyssey EX 3.5L No throttle response VIN: 5FNRL18674
First time this van came in the customer says while driving suddenly had no throttle response. They pulled over and cut it off. When they restarted it was fine. We checked the computer and there were no codes and found nothing out of specs. This time the custo...
2009 Honda Odyssey EX-L 3.5L Misfire, MIL Lamp on VIN: 5FNRL38759
Vehicle came in for requested timing belt, waterpump, plugs, bank#2 converter inefficient p0430.Replaced parts ran in shop to insure no air pockets road test fine.Rechecked on scanner, temporary codes p0304-p0305-p0306.Cleared road test again-now excessive smo... Trouble codes: P0304, P0305, P0306
1988 Jaguar XJS C 5.3L injectors/ ecu VIN: SAJNA3847J
This car was towed into us the other day not running. Has good spark and fuel pressure but is not getting injector pulse. Can't find much testing in alldata for this system. It has vacuum to the ECU and line is not blocked . Scoped IGN amplifier with tac and E...
2006 Jeep Commander 3.7L Unknown VIN: 1J8HG48K96
rebuilt transmission replaced vavle body replace tcc two times transmission goes in and out of overdrive at 30- 35 mph anybody had this problem
2000 Lexus RX300 3.0L Stall VIN: JT6HF10U1Y
hi iatn brothers and sisters. I have a lexus rx300.that will die w/driving. original complaint was poor idle and stalling at stop. replaced iac . now it runs smooth and no stalling at stop. customer drove for two days no problems. now it will stall going down ...
2004 Mazda RX-8 1.3L No Start VIN: JM1FE17344
hello, have this RX8 with a no start and low compression (40 psi). car will start sometimes if you crank on it long enough and when it is running it runs like nothing is wrong with it. I went to pick it up and it took several times cranking it for it to start ...
2007 Mazda CX-7 Touring 2.3L Engine Dies VIN: JM3ER29377
This vehicle was sent to us by another shop. They had just installed what looks to be a used but very healthy 2.3L. Seems the original one had met its demise at a neighboring quick lube due to a double gasketed oil filter. Anyway, the motor starts and runs fin...
2002 Mercedes-Benz S430 4.3L Lighting VIN: WDBNG70J52
Car came in with brake light stays on, install new brake light switch & no luck, there's no power going to the blue/black wire at the brake light switch, all fuses are goog, suspect rear SAM Module & that did not solve it,,,any help will be greatly appreciated
2010 Mercedes-Benz R350 Bluetec 4Matic 3.0L Check engine light VIN: 4JGCB2FB1A
Check engine light comes on. Codes 16F6-00 and 16f7-00 both say ignore fault, codes as I'm researching have to do with diesel emission fluid or system. I added 2 gallons of bluetec fluid to tank because was almost empty. Codes still return. I have found that t...
2003 Mitsubishi Eclipse Spyder GTS 3.0L engine VIN: 4A3AE75HX3
Vehicle returned with check E lite on P0300. misses very slightly at hot idle RPM around 7-800. can hear miss out exhaust. drives fine only at hot idle does it have a slight shake. Injector kill is next to useless all make the same difference. non of my scan t...
1997 Nissan Sentra GXE 1.6L Excessive Emissions
I had this Nissan come in for an emission inspection. Initial DTC's were P0100, p0110, and P0325. The knock sensor code i have ignored at this point. I have not been able to reproduce the p100 but the P0110 was addressed by correcting two vacuum lines incorrec...
2005 Nissan Pathfinder LE 4.0L tach VIN: 5N1AR18W65
Customer states that the tachometer quits, the display below on left side goes blank, and right lower display shows xxxxx below mileage in the trip area. this happens in park only, she had taken a video with phone to show me. Do these have problems with the cl...
1984 Pontiac Fiero 2.5L Fuel Tank VIN: 1G2AM37R5E
Hello all, We have a customer with a 1984 pontiac fiero. The fuel tank is leaking and in need of replacement. But we cannot find a new tank for this thing. Just wondering if anyone had a line on a fuel tank. New or used doesn't matter! The issue with used is ...
1997 Saab 900 SE Turbo 2.0L Poor Idle Quality, Cuts out, Stall VIN: YS3DF58N9V
Hi guys thanks in advance for any help you can offer. This vehicle is hard to start then once started it will idle in drive but as soon has it is put into reverse it dies. I have checked for vacuum leaks none found fuel pressure okay. The intake vacuum is only... Trouble codes: P0300 (Random misfire)
2012 Scion tC 2.5L Starting VIN: JTKJF5C72C
This vehicle is a flood victim. I can start it by applying power to the pin at the ecm that goes to the starter relay. It starts and runs and at no time do I have an indication of an immobilizer concern. If I try to start it with the button it starts cranking ...
1999 Subaru Forester L 2.5L Fill w/ Fuel VIN: JF1SF6351X
Replaced fuel filler neck with solenoid due to age and condition - originally had codes for EVAP system. Now, we have code P0420 present and customer cannot fill with fuel. We disconnected filler neck from rubber inlet hose and ran gas through no problem. Once...
2003 Suzuki Vitara 2.0L MIL Lamp on VIN: 2S3TE52V63
I retrieved dtc p0401 performed egr test with solis no rpm change removed egr valve and verified pintle movement checked for vacuum supply at intake port very strong went a step further and removed intake tube from valve to intake and found very clean and clea... Trouble codes: P0401
1996 Toyota Tacoma DLX 3.4L Right door latch/lock VIN: 4TAWN72N5T
The latch assembly on the right-hand door is broken. I tried Toyota dealer--part is obsolete (discontinued) I tried several OEM sources online-they show they have the part, but when I call, they can't get it. Part number is 69310-35220. A reliable source for a...
2003 Volkswagen Jetta GLS 1.8L No Start VIN: 3VWSE69M23
This is my brothers car dead in his driveway. I'm working on my own now, no alldata or anything like that, just a Haynes manual and my SnapOn Scanner and Vantage that goes up to 2000, not 2003. Car has a charged batt. healthy sounding crank, but no start. Spra... Trouble codes: P0705, P0864
2004 Volkswagen Golf GLS TDI 1.9L Eng Temp VIN: 9BWGR61J34
HI EVERY ONE , have a 2004 golf tdi that will not heat up after t-belt w/pump replacement - engine will not come up to temp & stay there, replaced thermostat thinking it was stuck open but same problem. on hard long drive temp came up but dropped as soon as yo...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2005 BMW 325xi 2.5L MIL Lamp on, air pump won't run VIN: WBAEU33495
Well the customer decided to go and trade this in, given the cost of the repairs. I did check the pid for the MAF, and it was giving an acceptable reading whenever I activated the air pump. At this point we condemned the DME ($1600 for the part alone). Cust... Trouble codes: P0411 (Secondary air injection low flow).
2008 BMW X5 4.8i 4.8L Battery VIN: 5UXFE83568
First I replaced the AGM battery with a new Exide AGM. . I did a battery rest procedure here, and sent it to another shop to do the battery registration... which I'm not sure is different than a reset. But the alternator would then start charging... at times....
1996 Chevrolet C3500 Cheyenne 7.4L No Start VIN: 1GCHC33J6T
Thank you for the informative responses, once again all the techs. on IATN helped a lot!! After reading the responses we opted to replace the distributor (after checking the cam gears teeth) and the truck runs like a champ!! Turns out this was the first tune-u... Trouble codes: P0340 (Cam position sensor).
2004 Chevrolet Impala LS 3.8L Heater Inop VIN: 2G1WH52K04
well thanks for all the input it turned out to be the blower motor and resistor
2006 Chevrolet Malibu LT 3.5L Cuts out, Stall VIN: 1G1ZT51856
thank you all for the help some times we just have to go back to basics come to find out the throttle body just needed to be relearned also re-flashed pcm with updated software thanks a ton everyone
2007 Chrysler Pacifica Touring 4.0L Battery VIN: 2A8GM68X37
After many painful hours the customer pulled the plug on my diag because her Mom needed her car back and she didn't want me to spend the time to fix it. I know it's the IPM, I know it is. It has to have an internal short to ground. Under the IPM is a green...
2003 Dodge Grand Caravan SE 3.3L Starting VIN: 2D4GP44R73
upon further looking we found a couple wires that a mouse had gotten a hold of. Repaired wires and still no luck. Inspected all connectors under fuse box and did not find any problems, thoroughly inspected all wiring harness, pcm connectors and powers and grou...
2013 Dodge Journey SE 2.4L ASD A circuit VIN: 3C4PDCAB1D
Disassembled PDC to take a closer inspection, where I found serious corrosion in the printed circuit board, right next to the PCM/TCM relay,there were also burn marks around that area fusing the circuits together, explaining why the vehicle would start with th...
2007 Mercedes-Benz S65 AMG 6.0L water in oil VIN: WDDNG79X27
Most all agree that this is normal. I believe this to be the case with this car also.The remedy is to drive longer trips fully warmed up. I have never seen this before, and its probably because i live in the desert. When this happened, we were having some fre...
1996 Mercury Villager GS 3.0L Misfire VIN: 4M2DV11W1T
Only one person answered my question about the scope patterns I had posted and that was Shannon. Thanks for the replies, I had a few tell me about the distributor. The distributor my be noisy but was not bad nor the sensors inside (cam and crank). "squiggly" l... Trouble codes: P0325 (Knock Sensor Bank1), P0300 (Random Misfire).
2011 Toyota RAV4 Sport 2.5L MIL Lamp on VIN: 2T3RF4DV4B
Hello and thanks to all for your help. ended up replacing upstream a/f ratio sensor. fixed issue voltage now at .075 instead of .835. It still makes very little sense to me that 3.2 volts to 3.5 volts would actually change the downstream o2 that much. I only h... Trouble codes: P0138.
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