Automotive Technicians Technical Discussion and Fixes for Mar 28, 2016

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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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	Help Request	Answers
	2008 Acura MDX 3.7L Alarm VIN: 2HNYD28858 lock the vehicle like normal, arm the alarm [factory- No aftermarket stuff attached except trailer wiring] Intermittently the horn and lights will sound like its being unlocked [stolen] its very annoying :) visual inspected latches, jam switches, hood latch, n...	View
	2005 Audi A8 Quattro L 6.0L Won't pass smog VIN: WAUMR44E75 ...We have no codes and no pending codes. The vehicle won't pass smog due to the O2 sensor monitor not resetting in the DME. Lots of miles have been put on the car with no success of it resetting. I've run the vin # with the Audi dealer and they said there is ...	View
	2006 BMW X5 4.8is 4.8L Misfire, MIL Lamp on VIN: 5UXFA93596 Need some help on this one, I got a x5 with a v-8 that starts missing after it warms up, about when it would go into closed loop. The computer will shut down the injector after a little bit, cycle the key and will be ok for 30 seconds and start to have a sligh... Trouble codes: 29CC, 29D0, 29C1, 29F4	View
	2008 BMW X5 4.8i 4.8L starter VIN: 5UXFE83588 Had a bad starter when it first came in. Replace with a new one. Drove vech. and turned it off a few times. After driving for 30min. let it sit for ten min. Would not start with code A0B4 (Engine Starter Operation). After sitting for twenty min. it started aga...	View
	2005 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNEC16Z45 hello all, i am checking this suburban for for a large evap leak, the canister purge valve had been replaced from another shop. i did a smoke test and found that the new valve is leaking as well. i used a scan tool to activate the solenoid and it still has a s... Trouble codes: P0178 (Fuel composition sensor circuit low frequency), P0327, P0455	View
	2003 Dodge Ram 3500 5.9L No Start VIN: 3D3LU38C53 I have a Common rail that does not like to start when cold. Cold to us here is only in the 45-55°F range in the mornings(not very cold), but enough to make the heater grid run. This problem only occurs when the heater grid runs. Never any other time. If you cy...	View
	2008 Dodge Magnum SXT 3.5L alternator VIN: 2D4FV37V98 One for you Iacocoa afficianados. Got this 08 Magnum 3.5 can't get the alternator to charge. Alternator replaced 3 times before I got to it. Only three wires to alternator. Output to battery, field circuit from pcm to alternator and sense wire from alternator ...	View
	1995 Ford F Super Duty XL 7.3L Surge VIN: 1FDLF47F4S I have this Ford Super Duty that starts good and runs but often starts loosing power and surges at cruise, usually under load. It feels likes it's running out of fuel. I've run every test on the scan tool and it passes. I've replace the fuel filter, fuel lift ...	View
	2010 Ford Explorer XLT 4.6L MIL Lamp on VIN: 1FMEU7D80A Fuel gauge reads empty but customer is sure fuel is half full. Scanner reads zero percent. I cut the yellow violet wire in the harness under the center of the truck and measured the resistance on the sending unit side to ground. Reading was fluctuating and in ... Trouble codes: P0462 (Fuel sending circuit out of parameter)	View
	2012 Ford F-150 FX4 5.0L Unknown VIN: 1FTFW1EFXC What we have is a howling noise that sounds similar to a wheel bearing that only occurs when the truck is in 2wd. If you shift to 4wd the noise instantly goes away and if you shift on the fly back into 2wd it won't come back until the vehicle speed decreases b...	View
	2003 GMC Yukon SLE 5.3L No Start VIN: 1GKEK13Z93 My landlord who also own a shop gave me the car to vacuum it and put AC gas after the engine swap,the car was running ok, I vaccum it, charge it 1.8 lbs , I notice the ac was not running, and the flasher stays on and the relay was clicking, I try to access the...	View
	2008 GMC Acadia SLE 3.6L Shifter interlock VIN: 1GKER13758 Hello fellow techs. I have a 2008 Acadia that does not release the key from ignition lock cylinder when it is shifted in park. My diagnosis is as follows: No codes in any module. Found the ignition lock that releases cylinder to turn key for release. Has good ...	View
	2009 GMC Acadia SLE 3.6L A/C not cold VIN: 1GKER13D19 A/C temp varies between 45deg to 60deg low pressure drops to 20psi then the compressor will cut out. high side will be anywhere from 150psi to 250psi. the system takes over an hour to equalize pressure after shutting the a/c off. we replaced the txv valve ever...	View
	2004 Honda Civic EX 1.7L fuel VIN: 1HGEM21974 I replaced with a used motor, transfer all parts from old one including the new timing belt kit. After I got everything back where it belong; the car crank but would not start. I check but no fuel on spark plug. I disconnected the fuel pressure line; no fuel c...	View
	2007 Honda CR-V EX 2.4L door locks VIN: JHLRE38707 Hello. I have this CRV where the door locks will cycle by themselves. I have never been able to get it to act up. Research shows a lot of problems with the front door lock actuators. I replaced both the front ones. The customer says the problem is still there....	View
	1999 Jaguar XK8 4.0L Excessive Emissions VIN: SAJGX5042X Hi guys, car came in with MIL light on and code stored was P0455, evap system large leak, fuel cap was new and just replaced, we found the purge valve was bad, replaced valve and cleared codes, we gave customer car to drive so monitors would get reset for Cali...	View
	2010 Land Rover Range Rover Sport Supercharged 5.0L Warning VIN: SALSH2E49A Hi all in IATN land. Thanks for taking time to read this post. Came in with water pump leak. Replaced the pump and have a charging system message in the DIC. Tested charging system. Low output. Alternator got soaked with coolant. Dried out and re tested. Worki...	View
	2006 Mini Cooper S 1.6L 1-2, 2-3 shift only VIN: WMWRH33576 Trans starts downshifting 3-2 and 2-1 harshly after 15 miles of driving. Once downshifting gets harsh, upshifting gets harsh also, but only in those gears. If the key is off for 10 minuites or more, the shifting returns to normal for a short time. No warning ...	View
	2002 Porsche Boxster Roadster 2.7L cannot add fuel VIN: WP0CA298X2 Fellow techs. I have this 2002 Boxster that we cannot add fuel. All we can add is 3 seconds of fuel and it comes right back out. read diagnostics. no codes. removed the fuel pump and inspected. hoses appear ok. checked and replaced fuel E6. replaced fuel breat...	View
	2010 Porsche Panamera S 4.8L Charging VIN: WP0AB2A7XA The original battery was bad plus it had codes indicating an issue P1699 Communication with generator / P1696 Electrical fault in generator. We replaced the battery and erased the codes we didn't register the battery, due to the client rushing to get out of he...	View
	1998 Volkswagen Jetta TDI 1.9L No Start VIN: 3VWRF81H2W A mechanic put new injection pump. Car started fine. After two weeks car won't start cold untill you discinnection coolant sensor. On my snap on scanner coolant temp is 64 defrees F connected, if i disconnect it goes to 66 F. I get 10 volts to glow plug connec...	View
	2001 Volkswagen Jetta GLS 2.8L Serp Belt VIN: 3VWSG69M71 We towed the vehicle in. Found the serp belt shredded, the water pump pulley broken 3/4 way around and had coolant pushed out. Replaced the pulley, checked water pump & other driven accessories, topped -off the coolant (dexcool had been previously added) and w...	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2005 Cadillac CTS 3.6L limp mode transmission VIN: 1G6DP56735 After all the testing on this vehicle it was determined the problem was in the transmission itself with the solenoids. The rebuilder is sending us another unit to replace this failing unit. Thanks for all the ideas.	9
	1993 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, Backfire VIN: 2GCEK19K9P Finally got this nightmare fixed. After putting 3 distributors on it (bc the first 2 were bad out the box) the problem still persisted. I finally pulled one of the spark plugs the customer put on and saw it was one of those E3 plugs. So i replaced them with De...	34
	1998 Chevrolet C1500 Cheyenne 5.0L Wipers VIN: 2GCEC19MXW Thanks to all with the helpful replies. Had to get away from this one for a couple of days and started back on it today. After checking all grounds, even adding some, with no success, I replaced the multi function switch. Problem solved. Thanks again, D H Smi...	11
	2005 Chevrolet Colorado Z85 LS 3.5L Poor Idle Quality, Stall, Misfire VIN: 1GCDT13625 I am TOTALLY embarrassed!! Because the fuel pressure never dropped when the engine was running (sort of), I assumed the flow volume was ok. Never assume anything. If you spell it out it says a ass out of you n me. Replaced dirty fuel filter, put all sensors a... Trouble codes: P0300 (Random missfire).	15
	2009 Chevrolet C4500 Kodiak C4U042 6.6L No Start, Stall VIN: 1GBE4C1999 I am sorry I am closing this so late. I forgot it was still open. The PCM relay is actually listed as Ignition 1 and 2. It turned out to be the female side pins in the fuse box that the relay plugged into. You can see one of them were spread out a bit. W... Trouble codes: P2510 (PCM relay malfunction).	8
	2004 Chrysler PT Cruiser 2.4L Not sure VIN: 3C4FY48BX4 I had already open the water pump when I open the request so we close it and the car is running good since we put it. The aftermarket water pump was looking good, no sign of wear yet that was the problem. I am so thankful and grateful to volumes of response ...	29
	2007 Ford E-350 Super Duty 6.0L MIL Lamp on, no accelerator pedal VIN: 1FDWE35P67 we called the local Ford dealer, they say the truck was NOT brought to them; we called the customer - he was very evasive, would not tell us where the truck was or if it was fixed or not. otherwise... many replies ( thanks very much!) Lots of problems with ... Trouble codes: P0107, P0405, P0472, P2285, P2104 (TPS switch DE voltage correlation / TPS switch E ckt low input), P2287 (injector pressure sensor ckt intermittant).	16
	1997 GMC K1500 Sierra SL 5.7L MIL Lamp on VIN: 1GTEK19R9V the head light wireing was melted. i thank all who helped me.And May God Bless All.	11
	2009 GMC Acadia SLT 3.6L No Start VIN: 1GKEV23D79 HEY, GUYS THE FIRST THING I WOULD LIKE TO DO IS THANK YOU ALL FOR THE GREAT INFORMATION PROVIDED FROM YOU .WELL THOSE OF YOU THAT SAID PLUGGED CATALYTIC CONVERTER HIT RIGHT ON NAIL. I TOOK YOUR SUGGESTION AND WENT TO FRONT CATALYTIC CONVERTER REMOVED THE O2 SE...	19
	2010 Hyundai Santa Fe GLS 2.4L Starting VIN: 5NMSGDAG0A So in the related history box, I had listed that we had tryed new keys and that made no difference, We ended up scoping the digital signal from the immobilizer module to the pcm at the pcm connector and the signal stayed consistant on both starts & no starts, ...	13
	2004 Jeep Grand Cherokee Laredo 4.0L Governor pressure VIN: 1J4GW48S24 This Jeep is repaired. I thank all of you who responded as you were all right on the money. I replaced both transducer and solenoid and they repaired the problem. Governor pressure PID now directly follows desired PID. Easy job.	10
	2005 Porsche Cayenne 3.2L No Start, No Crank VIN: WP1AB29P05 Thank you for all the replies! We did get the vehicle back to a cranking state and a communication state by going under the drivers seat to a reset button located on a safety feature module (box)when we pushed the button in it reset everything and we were able...	6
	2001 Saturn LW300 3.0L Lifters VIN: 1G8JW82R01 I cannot say that the car is fixed yet but the car is quiet now and we know the reason why. A long story told short and out of order, we found full oil pressure at the oil filter housing and at the oil gallery plug next to the filter housing, which is where t...	26
	1975 Volkswagen Beetle 1.6L Stall VIN: 1152162998 Thank you for all the replies. This vehicle is on the back burner and we havent gotten back to it since creating the help request. Things are beggining to slow down so we should have enough time to put some of the tips to work. Thanks again for all the ideas	21

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