Automotive Technicians Technical Discussion and Fixes for Jul 31, 2015

Join Now

Prev	Professional Automotive Repair Technical Discussions for July 31, 2015 International Automotive Technicians' Network (iATN) - Members Only	Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for All Makes and Models

	Help Request	Answers
	2003 Acura MDX Touring 3.5L Expansion Valve VIN: 2HNYD18993 I am working my own 2003 Acura MDX AC system and need help. First about me. I am ASE master certified in automotive, also medium and heavy truck, plus the new 109 AC recovery and recycling section 609. I have serviced ac systems more than 20 years. In May ...	View
	2003 BMW Z4 2.5i 2.5L conv. top VIN: 4USBT33423 This z4 convertible soft top will not go down. I scanned the top module and there is no codes stored. Check the fuses located in the fuse box located behind glove box, ok. I've tried with the hand brake on and with the foot brake on, no go. The only hint that ...	View
	2002 Buick Rendezvous CX 3.4L trans fail safe VIN: 3G5DB03E72 This vehicle lost an alternator driving up from texas to utah. Since the alternator was changed out it has had some strange behaviors in the morning. The chime on the vehicle stays on and the transmission goes into fail safe mode and only has reverse and third... Trouble codes: P0620, P0560	View
	2005 Cadillac STS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6DC67A85 Random misfires, intermittently, when is misfiring B1 avg injector pulse is 3.5ms and B2 avg injector pulse is 7.3ms. Lambda values per bank are 1.250 and 0.950 not certain which value is for which bank. When problem is gone all values are close to each other ... Trouble codes: P0300 (Random misfire), P0305 (Misfire cyl 5), P0420 (Cat effiency B1), P0521 (Oil pressure sensor)	View
	2006 Chevrolet Suburban 1500 Z71 5.3L a/c &heater fans VIN: 1GNFK16Z06 This vehicle has front and rear air and neither fan works. The compressor engages when turned on, everything else seems to work but both fans.Does the bcm control these, or the ignition switch? I don't have a wiring diagram for this vehicle, so can't trace. Th...	View
	2007 Chevrolet Tahoe LTZ 5.3L radio VIN: 1GNFK13097 So, I played with this last week and did multiple system resets with batt terminals shorted for about 30 minutes. Every time I connected ammeter and turned on the key to wake computers up, everything would go to sleep to 0.21A within 1-2 minutes. Truck did hav...	View
	2012 Chevrolet Impala LS 3.6L wont pass emissions VIN: 2G1WA5E38C This vehicle wont pass a state of Wisconsin emissions test. o2 and evap monitors wont set. Vehicle is very low miles and just out of warranty by date. Another shop tried running the drive trace on dyno but didnt work. We reflashed vehicle in case of a corrupt ...	View
	2001 Chrysler Sebring LXi 3.0L unknown VIN: 4C3AG52H01 Had this sebring come in for a heater core and ended up replacing the evaporator as well. A/C seemed weak after that. Hooked it up to the gauges and saw odd pressure readings so we tried a different expansion valve and it seemed to level them out. About a week...	View
	1996 Dodge Ram 1500 5.9L trans VIN: 3B7HF13Z7T this thing won't shift if you take rpms up driving it and let off throttle then you will see gears change on scanner but not the truck.I don't have b+ on pin 1 of trans connector.Checking at the relay koeo i will get b+ for a couple second then drops to .050 v...	View
	2009 Dodge Challenger SRT8 6.1L abs VIN: 2B3LJ74WX9 I have this 09 challenger, when accelerating, every time you hit 23 mph, the traction control light flashes, the abs pump comes on, the throttle backs off and the left front brake is applied, as if the vehicle is having some sort of esp or traction control eve...	View
	2002 Ford F-150 King Ranch 5.4L No Start, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTRW08L52 just back from dealer with new pcm still goes in to limp in mode due to cylinder head temp gage will peg hot just turning key on then hard to start if at all. one time disconnect chtemp sensorgage drops to normal next time didn't change. so I guess my question... Trouble codes: P1289, P1299	View
	2004 GMC Savana 3500 6.0L No Start, Cuts out VIN: 1GDHG31U84 I had no crank, no start. No codes on all modules. No spark, No fuel pressure. Replaced the pcm and still had same symptoms. Then I found that fuse #2 in the underhood fuse box was blown. The vehicle started up and ran fine. Though maybe the pcm was the source...	View
	2003 Jaguar X-Type 2.5L Unknown VIN: SAJEA51D13 Hello..I have this jag with the oil light coming on at an idle. It takes about 35 minutes. It starts to flicker and then stays on at idle. You give it some gas and the light goes out. It first came in with the oil light staying on all the way to 2000 rpm. I ch...	View
	2003 Jaguar S-Type 3.0L Fail safe mode VIN: SAJEA01T03 This car has a weird problem, when diving the car it will run well for a while then out of the blue it will go into some kind of fail safe mode and will lose all engine power and the cluster will say (dsc not avalible ) and (engine system fault) and (parking b... Trouble codes: U2523 (Can message timeout form ecm)	View
	2006 Jaguar XJ8 4.2L monitors VIN: SAJWA71B26 vehicle needs nys inspection ,o2 and secondary air monitors wont set,what doesn't make sense is the cat monitor is set,always thought the o2 monitor had to set before cat monitor,any help would be appreciated	View
	2002 Jeep Liberty Limited 3.7L Lighting VIN: 1J4GL58K92 Customer stated that a couple times the headlights have gone out, the interior lights are sometimes inop, and interior lights came on with turn signals. Of course it is extremely intermittent. I'm suspecting the BCM, but would like some proof before replacemen...	View
	1989 Mercedes-Benz 260E 2.6L No Start VIN: WDBEA26D8K After a Hot soak of about 20-30 minutes, The vehicle will crank and not start, how ever this will occur first thing in the morning as well after sitting over night. Having a fuel pressure gauge from supply pressure to the cold start valve, we found on the cold...	View
	2008 Saturn Vue XE 3.5L No Start, Stall, MIL Lamp on VIN: 3GSDL43N08 Hi all! This car came in as a no crank. Turn key on and Abs and service vehicle lights flicker and tach and gas gauges bounce. I could not communicate with PCM, BCM, Instrument cluster, ABS, or Air bag. On occasion I can communicate with Trans module and got t... Trouble codes: U0073 (u0100-), U0100	View
	1990 Suzuki Samurai JL 1.3L Starting Need any help that is available, cust put 3 diff starters in and all from same store, she thinks it is the starter, I think it is electrical, what is common, or would cause a 7v drop on S terminal wire from Clutch safety switch.	View
	2003 Toyota 4Runner SR5 4.0L Brake VIN: JTEBU14R83 Customer went to start car after stopping for a while. Started car and the buzzer was sounding and the abs, vsc trac, vsc off light on. Not My Area Of Great Knowledge. Any Help Would Be Great. Thanks Al	View
	2004 Toyota Camry XLE 2.4L No Start VIN: 4T1BE32K94 At our witts end with this one. Computer is indicating engine temp and intake air temp at 226-240 degrees sometimes even when car is cold. All test indicate ecm. Sent ecm off for repair and they could find nothing wrong with it. Even with the temp sensor unplu...	View
	2002 Volkswagen Jetta GLS 1.8L Reverse and 3rd VIN: WVWSE61J52 Just got this 2002 Jetta in from the auction and while unloading from the trailer it didn't want to move in reverse. it would lock into gear but acted like the park brake was on had to really push it for it to back up and heard a couple pops similar to an axle...	View
	2006 Volvo S60 2.5T 2.5L MIL Lamp on VIN: YV1RH59296 Car came in with these 2 codes, codes have been on for over a year according to the customer. Car runs fine. Customer replaced both 02's himself with Bosch. I tried Volvo 02's and same issue after about 5 min of driving every single time. I pinned out all the ... Trouble codes: ECM24, ECM24	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	1997 Chevrolet C3500 Cheyenne 7.4L Poor Fuel Economy, No power VIN: 1GBKC34J3V The owner decided to buy a used motor rather last buy new fuel injectors. After hours of checking, here is what I found. Pressure drop to be too much, backpressure IS 1.5 psi, dropped exhaust on both sides & it ran the exact same, no power. Deadhead pump & en...	18
	2013 Chevrolet Silverado 3500 HD LT 6.6L Electronic VIN: 1GC3KZC88D thank you to dean from texas and kevin from ohio.the tcm fixed the problem and i was able to program with snapon pass thru pro .thanks guys	7
	1996 Chrysler LHS 3.5L MIL Lamp on VIN: 2C3HC56F9T Thanks for your help, reflashing did not work so we replaced the PCM and light went out, thanks again Jay Trouble codes: 1696 (denied eeprom writ).	6
	1997 Ford F-250 7.3L No Start VIN: 1FTHF25F1V First of all I want to thank all the guys that helped me get this truck fixed. I knew I wasn't getting fuel to the injectors since I wasn't getting fuel at the schrader valve. I checked the fuel flow and pressure at the outlet of the new pump I put on and it p...	18
	2005 Ford Five Hundred Limited 3.0L Hesitation, Stall, MIL Lamp on VIN: 1FAHP25115 Thanks to everyone for their reply's. The customer traded the vehicle off before any further testing was done. Reply's included checking for bad connections and contamination which were not found. I did contact a help line and they phone tech stated that OE an... Trouble codes: P0191 (Fuel pressure).	7
	2013 Ford Fusion SE 2.0L No Start VIN: 3FA6P0H95D I want to say thanks to everybody that provided information on this one, but this vehicle has been send to the dealer, dealer has one weak with no results. they have not idea what to do. like I mentioned before, engine starts and runs fine with the old compute...	7
	1997 GMC C1500 Sierra SL 5.7L Cuts out VIN: 2GTEC19R9V Thanks to all that replied, they were all good tips.. I did get this truck to finally die on me. What i found was the fuel pressure was dropping to 40psi.. not enough to let the truck run. I figured I was losing voltage or ground to the pump.. I tried a new f...	25
	2006 GMC Yukon Denali 6.0L passenger side window VIN: 1GKEK63U76 Hi everybody, thanks for the help, and thanks to Doug, I was really confuse on the diagram I first printed because it didn't have the all the wires of the connector for the window switch, so I though it was only one power going to the switch and not two powers...	15
	2000 Honda Prelude 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHMBB6140Y So i am closing this request, i really appreciate all of the help, had a couple of useful diagnostic aids that i did not think of, i did try smoking the vehicle, egr and iac were leaking slightly but not specific to cylinder 1, i dont think this particular veh... Trouble codes: P0301, P1399 (random multiple cyliner missfire).	16
	2006 Honda Odyssey EX 3.5L CAN system VIN: 5FNRL387X6 The CAN bus was down. Traced problem back to the instrument cluster K-line connection. Repaired connection at the connector itself and that was the fix. Thanks everyone for you reply.	5
	2009 Jaguar XF Supercharged 4.2L blind spot warning VIN: SAJWA07CX9 Thanks guys,turned out to be the side view mirror shorting out.Causing left blind spot module not communication to the right blind spot module.	None
	2002 Jeep Liberty Limited 3.7L Stall VIN: 1J8GK58K52 Thanks for the great replies. A crank sensor fixed this one. I was told that when the sensor shorts it will drop the 5 volt signal causing the stall and lack of communication. Cheap and easy fix. Trouble codes: P0320 (No Crank Signal at PCM).	13
	1989 Mercedes-Benz 260E 2.6L Poor Idle Quality, lumpy running VIN: WDBEA26D8K After all the great responses we have received we tried a multitude of items on the list and finally found the injectors were leaking occasionally but not always. We went ahead and replaced the injectors and found it to be running okay on start up after. H...	13

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