Automotive Technicians Technical Discussion and Fixes for Feb 7, 2014

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	Help Request	Answers
	2007 Audi Q7 Premium 3.6L no cranking VIN: WA1BY74L67 hello tech car came in the shop on the hook and it wont start or crank and key wont come out inspected all the fuses and it was good inspected furthe for test found a power supply relay test , inspected the power supply relay has the two red wires with a 12v p...	View
	2002 Chevrolet Tahoe LS 5.3L No Start VIN: 1GNEK13ZX2 Vehicle will crank but not start. Happened one time in the shop. Fuel pressure is at spec and when I put a spark tester on it fired right up and unable to duplicate complaint. Customer states it will crank and not start, then 1 hour later he'll try again and i...	View
	2004 Chevrolet C5500 Kodiak C5C042 6.6L Throttle VIN: 1GBE5C1114 Two troublemakers in the same week!! This is our farm service truck and its a good time to get everything working right. Pto switch on the dash is factory has upfitter switches under dash for the crane and compressor PTO. Everything works OK but the engine won...	View
	2006 Chevrolet Aveo LS 1.6L MIL Lamp on VIN: KL1TD66626 egr percent reading at idle or key on engine off always sits at 16%.does not change until i get to 40% on scan tool,then goes to around 32%.idle drops and gets rough.i cleared codes twice,disconnected batt.touched cables together with no change.thank you in ad... Trouble codes: P1404 (Egr sensor)	View
	2007 Chevrolet Suburban 1500 Z71 5.3L Wont accel VIN: 3GNFK16317 Car came in for no power and transmission not slipping. found trouble code for Accelerator Pedal Position (APP) Sensor 1-2 Correlation. upon test drive found that car will only go around 20 mph then transmission will down shift like you pushed accelerator down... Trouble codes: P1238	View
	2010 Chevrolet Express 2500 4.8L No Start VIN: 1GCZGFBA5A Good Afternoon. This van has been to two other shops both installing new fuel pump relays. Van has no real pattern to no start condition. today was towed in to us no start no codes. fuel pump was not running. swapped known good relay in and it started multiple...	View
	2012 Chevrolet Cruze LS 1.8L MIL Lamp on VIN: 1G1PC5SHXC This is a good one - engine set p0017 code 4 seconds into running - the software will not let me change the cam position due to the code in the system. I used an outside voltage source to check to solenoid operation - sure enough the engine stalled - no change... Trouble codes: P0017 (Ckp to exhaust cmp correlation)	View
	1993 Dodge Dakota 2.5L Clutch truck came in hard to shift had to pump clutch a lot of times so it would shift. found clutch master leaking. changed clutch master and slave cly. they come all one unit. they are pre blead when madfe. theres no way to bleed them. don't feel like they're the p...	View
	1999 Dodge Ram 2500 5.9L Cuts out VIN: 1B7KF2364X Truck came in for low power/cutting out on hard acceleration. There were no ECM (injection pump) codes and only a Bus code from the PCM indicating a communications error from the ECM. The lift pump was pretty noisy so I checked the volume - I found about 12oz.... Trouble codes: P1694 (No Engine Bus Message Received)	View
	2002 Dodge Grand Caravan ES 3.8L Blower VIN: 2B4GP54LX2 This van has automatic climate control and van came in with the blower motor on high with key on but goes off with the key off - main control unit seems to operate correctly.. The display turns on and off and the speed displays it goes up / down as its changed...	View
	2003 Dodge Ram 2500 5.9L leak VIN: 3D7KA26C43 Leaks from injection pump front cover access plate? No running issues, just can't have leaks going through weight station. Any help will be appreciated? Friend told him needs new pump. Also how much time to change pump and needed tools for this? Its a small le...	View
	2005 Dodge Ram 1500 ST 4.7L No Start, Poor Idle Quality, Stall, MIL Lamp on VIN: 1D7HU18N85 fuel pressure ok- smoke test intake to find egr valve leaking- replaced- still no idle cold checked for vac. in crankcase- warm no vac. installed new battery and spark plugs- relearn all memories once the truck is warmed up truck idles and runs fine- cold goin... Trouble codes: P0129	View
	1993 Ford F-150 XL 4.9L rear brakes locking up, abs light flashing VIN: 1FTEF14Y5P hey guys need some help. I have 1993 ford f150 that the rear brakes are locking up intermently and abs light is flashing and coming on. the only codes I can pull from abs is code 16 which is abs passes code. vehicle has had rear brake hardware replaced and bot...	View
	1996 Ford F-150 Eddie Bauer 5.0L timing cover VIN: 1FTEF14N7T reg customer high miles but in good cond. noticed a good sized leak from TC. It's been a long time since I replaced a TC gasket /t chain on one of these beasts.. Alldata shows remove oil pan... don't remember ever having to pull oil pan to do t/cover gasket / ...	View
	2004 Ford Taurus SE 3.0L Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1FAHP53U14 Car was severely flooded. I replaced the spark plugs and replaced the oil. Car started right up and ran like a champ. pulled it outside to restart in the cold and that's when the problem occurs. Car will NOT act up unless the ambient temperature is extremely c... Trouble codes: P0300	View
	2008 Ford F-550 Super Duty XL 6.4L No Start, Poor Idle Quality VIN: 1FDAF57R18 Hi everyone, I have a bit of a head scratcher here. I have a f-550 6.4l diesel that will not start. it was originally towed in,after the customer had replaced the alternator. he drove it till it died. we did the basic checks. it had water and algae in the fue...	View
	2011 Ford F-350 Super Duty King Ranch 6.7L No Start VIN: 1FT8W3DT3B Truck was towed in died while driving and would not restart. It had o psi from low pressure pump. Replaced low pressure pump and filters.We now have 60 psi at filter still no start. ICP pressure will read up to 800 psi cranking and desired shows 4500. Replace ... Trouble codes: P2291 (ICP pressure low while cranking)	View
	1995 GMC K1500 Sierra SL 5.7L No Communication VIN: 2GTEK19K6S Help!!! i have a 1995 gmc k1500 with abs light on. Cant get any communication from aldl obd-1. Checked pin b, within specs. Checked pin h, should be under 5v it is at 12v. My wiring diagrams arent that good. Cant seem to put my finger on power supply. When i u...	View
	2004 Honda Odyssey EX 3.5L Misfire VIN: 2HKRL18624 This vehicle got the head gaskets done at another shop, our customer brings it here with the check engine light on. We find that there is a random cylinder misfire under load and that it goes away when the egr valve is disconnected. Installed a new egr no diff... Trouble codes: P0301 (p0304-), P0304 (p0305-), P0305 (p1399-), P1399	View
	1996 Infiniti I30 3.0L Monitors VIN: JNKCA21D2T Needs to set monitors for Illinois Emissions. Came in with Heated O2 monitor set only, customer has driven it for over 2 months. Told me prior to that it had a code for rear O2 sensor, but had chain store clear it. Took for test drive after replacing rear O2, ...	View
	2004 Mazda 6 i 2.3L No Start VIN: 1YVFP80C64 I got this lovely Mazda here. No start condition. I have no spark or injector pulse. Motor is full of oil. I have replaced the CKP and CMP sensors to no avail. I have no RPM signal on data PID. I pulled the valve cover to check timing, which i didn't really th...	View
	1998 Mercedes-Benz S320 SWB 3.2L Misfire VIN: WDBGA33G3W This car idles fine but as soon as you accelerate at all the misfire counter on cylinder 3 and 4 exceeds the limit and turns off the injectors on those two cylinders. The misfire recognition on the SDS show zero on the other cylinders and #s 3 and 4 hang aroun... Trouble codes: P0300 (Multiple cylinder misfire), P0303 (Cylinder 3 misfire), P0304 (Cylinder 4 misfire)	View
	2003 Mercedes-Benz SLK230 Kompressor 2.3L No Start VIN: WDBKK49F63 Vehicle towed in no start no crank, message on IC 'start error'. Inspected K40 module internally- no visual problems. Inspected pulse module internally- no visual problems. Tested all powers and grounds to both modules all ok including start signal from ign sw... Trouble codes: P202C	View
	2005 Mercedes-Benz S500 5.0L Battery VIN: WDBNG75J15 This vehicle came in after a few other shops failed . After a couple day cold soak the battery will be to low to start the vehicle . The charging system is perfectly normal . I isolated the alternator in case there was some kind of draw from it but still had 1...	View
	2000 Mercury Villager Estate 3.3L Cuts out, Stall VIN: 4M2XV14T0Y motor fuel hyd locked upon arrival on tow truck turn key to try to start motor locked up and sounded like all injectors firing koeo pushed in shop cleaned cly of fuel and changed oil, now it runs perfect im thinking ing drivers in pcm but not sure intrer issue	View
	2000 Nissan Altima SE 2.4L Surge I have a 2000 Altima that will not set 3 monitors. Cat o2 and o2 heater. When you drive the car you feel a slight buck and then the data goes out. When it comes back the car goes into open loop but none of the other monitors reset. Shut the car off and start i...	View
	2004 Pontiac Grand Prix GT1 3.8L No Start, Reduced power VIN: 2G2WP52244 Not sure what to think only when it is -0 to -20 the car goes into reduced power and not all the time either. Has anyone run into this??? poss a bad dealer throttle plate out the box? all scann data is reading good and it has not done it here which makes it to... Trouble codes: P0068 (Map/maf tp air flow), P0101 (Mass air flow)	View
	1980 Porsche 911 SC 3.0L Hot start HI all, Ok, I have this 1980 Porsche which came in for bad starting when hot. I believe the problem is with the fuel pump circuit. I have researched how the pump and relay works and it seems that the pump should only run while the engine is cranking, and then ...	View
	2010 Porsche Panamera S 4.8L horn VIN: WP0AB2A70A ok need help with this one , car came in with concern of horn not working , checked for voltage supply to horns and does not have any power, checked horn fuse and all fuses in drivers side inst panel and in luggage compartment all tested good. I removed both h...	View
	2002 Toyota RAV4 2.0L MIL Lamp on VIN: JTEGH20V82 Hey Techs, Thanks for taking the time. This may be long. Please read the whole thing. This 2002 Rav 4 came to us with code P0500 and speedo would drop to zero and trans would neutralize and/or shift oddly. Customer had replaced the ECU himself with one from ... Trouble codes: P0500	View
	2003 Toyota Corolla CE 1.8L MIL Lamp on VIN: 2T1BR32E53 This customer came in with check engine light with code P0171 - Fuel trim too lean. Visual inspection and smoke test cannot find any vacuum leak. Road test to determine if MAF at fault but all data reading look ok other than fuel trim. Short term fuel trim rea... Trouble codes: P0171 (Fuel Trim Too Lean)	View
	2012 Toyota Highlander Limited 3.5L smart key VIN: 5TDDK3EHXC got a call to program a smart key on this highlander, the shop lost the one and only key, using techstream I went into smart key reset( as to cancel the lost key ) I am guessing that every other time I programmed a key there was a master key present, Now it is...	View
	2001 Volkswagen Cabrio GLX 2.0L MIL Lamp on VIN: 3VWDC21V61 Came in with MIL and code 16486 (mass or volume air flow ciruit low input). Found MAF connector broken and terminals loose inside connector, tested mass air flow sensor acording to ALLDATA, lead us to replace MAF, also replaced connector and pins with VW parts... Trouble codes: 16487 (mass or volume air flow circuit high input)	View
	2006 Volkswagen Touareg 3.2L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: WVGZG77L66 Vehicle was drove in and dropped off for poor running, stall and mil on. Notice "related repair history". Vehicle would not start when brought in. Suspected fouled plugs. Have experience with vw and have the VCDS for them. But do not have much experience with ... Trouble codes: P0300, P0301, P0302, P0303, P0304, P0305	View
	2010 Volkswagen Jetta TDI 2.0L No Start VIN: 3VWPL7AJ5A I had this car towed in from another shop they were at a dead end with this car. No very familiar with the Common rail diesels Customer says that while driving on freeway the car just turned off like the key was turned off. First thought was a injection pump...	View
	2004 Volvo XC90 T6 2.9L Timing belt/cams VIN: YV1CZ91H34 We attacked the misfires with new NGK plugs and bosch coils. Misfire gone..oops, timing belt very cracked and obviously original. It gets exposed when you do the coils/plugs. Emailed customer with new/updated work order with the timing belt and water pump rep...	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2007 Audi A6 3.2L Lighting VIN: WAUBH74F17 Thanks guys! Another case of over thinking the problem. We did check the control modules. Turns out it was just the bulbs like a couple of you said. Jeff	5
	2004 BMW 545i 4.4L Oil Pump VIN: WBANB33574 This one is tricky but I found the problem: This BMW has a "low oil pressure" warning message even with a new oil pressure switch. That's the reason why I decided to check the oil pressure with an oil gauge. The oil gauge is connected to the oil pressure switc...	10
	2006 Chevrolet Colorado LT 2.8L Starting VIN: 1GCCS148X6 got her fixed up. installed a new throttle body. that fixed it up. thanks for all the replies.	6
	2002 Dodge Durango SLT 4.7L no mil VIN: 1B4HS48N52 This one is not going to be easy to summerize but I'll give it my best shot. Most of the replies centered on the premise that the used car dealer may have done something to cause the mil not to illuminate. That was one of my original thoughts as well. However,...	11
	2000 Ford Ranger XL 3.0L pats VIN: 1FTYR14VXY I believe everyone was right are antiquated laptop was just to old	4
	2002 Ford F-350 Super Duty XL 7.3L injection system VIN: 1FTSF30F32 Thank you for all the replies and tech advice. After installing new coolant temp sensor (not "fuel" as incorrectly noted in update above) sensor still threw bad temp reading. We followed up by scanning system and everything came up good. Fuel pressure check...	13
	2003 Ford F-150 XL 5.4L Anti-theft VIN: 2FTPF18Z33 Thank you for all the replies. After checking a few more things with no success. I replaced the pcm and was able to easily go in with the IDS, reset the parameters and program in the keys. Vehicle starts and runs properly now. So the pcm was the cause of the c...	7
	2004 Ford Freestar SEL 4.2L battery VIN: 2FMZA52244 SORRY IT TOOK SO LONG HAD TO BE SURE ENDED UP BEING AN ALTERNATOR. WHEN IT SAT FOR A 3HOURS OR SO THE DRAW STARTED AND WAS NOT ALL THE TIME.THANKS FOR THE IDEAS.	11
	2005 Ford Explorer XLT 4.0L front of truck VIN: 1FMZU73E65 Well this one is fixed,well enough for the customers liking at this point.After putting 4 new tires on this beast 90% of the noise is gone.No more jerking from the transfer case and the front diff is WAY less noisy.I still think it should get a front diff rebu...	16
	2007 Ford Freestyle Limited 3.0L Alternator VIN: 1FMZK03147 Found corroded wire at left front corner of engine compartment at breakout where ambient air temp sensor circuit exits the loom. The circuit was, what I'm getting from Alldata, is the Alt COM pin 2 yellow/ light blue wire. I tried the OE alt with no change, ...	13
	2002 GMC Yukon XL 1500 SLE 5.3L Misfire, MIL Lamp on VIN: 1GKFK16T52 Thanks to all who all who replied, it was indeed the intake manifold gasket. Replaced and retested and no further problems found at this time. Trouble codes: P0300, P0171, P0174.	44
	2000 Lexus RX300 3.0L radio VIN: JT6HF10U7Y Thank you...but I had to release this one back to customer. One interesting thing I found was that when I removed the battery and replaced it with a new one, everything was fine for 5 minutes. So I put the old battery on, everything was ok for literally 5 m...	3
	2006 Nissan Altima S 2.5L Misfire VIN: 1N4AL11DX6 Thank you to all that replied. Sorry that it has taken so long to close request, we were down a couple guys. I, found no intake vacuum leaks with carb cleaner. Verified converter was not damaged or pluged. I, rechecked compression with a different gauge. ... Trouble codes: P0302.	15
	1992 Toyota Pickup DLX 2.4L proportioning valve VIN: JT4RN93P4N Thanks for your input. I road tested this thing again with heavy braking and found no issues. The way i replaced the prop valve i guess is best because without touching the shackle side, the adjustment was not affected in my experience that I can tell. Still I...	4
	2006 Toyota Highlander Hybrid Limited 3.3L Unknown noise VIN: JTEDW21A06 Thank you everyone for the help. This baby went down the road with a new coil pack and the noise is gone. Couldn't believe the noise this thing was making	5

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