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Prev Professional Automotive Repair Technical Discussions for June 1, 2012
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Open Help Requests for All Makes and Models
Help Request Answers
1991 BMW 325i 2.5L No Start VIN: WBABB2314M
Hey guys, I need some help with this one. Car came in on a hook, customer says he parked the car, came back (don't know how long), and never started again. Car has no spark, no injector pulse, no fuel pressure. Car cranks no problem. First thing I checked is t...
1994 Buick Park Avenue 3.8L No Start, no injector pulse VIN: 1G4CW52L4R
Hello all-this buick is eating my lunch. car died on freeway. shut down and would not restart. in the shop it would sometimes restart for a second and die. security seems good-light illuminates and goes out when cranking. scanned pcm-it is commanding a pulse w... Trouble codes: P1361 (Ignition Control Toggle Malfunction), P0321 (Spark Lost----History Code), P1629 (PassKey2 Crank Malfunction)
1996 Buick Riviera 3.8L Brake pedal VIN: 1G4GD2218T
Evening group, Have my buddys' Riviera, problem is intermittently when pushing the brake pedal down slowly it keeps dropping to the floor and there is no braking felt throughout the vehicle until your damn near on the floor. Scary feeling when i first felt it....
2001 Chevrolet Monte Carlo LS 3.4L Starting VIN: 2G1WW15E71
hi there, i have a 1002 monte carlo that has a delayed start. fuses are good and relay is good. according to the schematic in alldata, the yellow wire in the ignition switch sends voltage to the pcm.(c2 pin 23 ppl wire)signal is ok. then the pcm is supposed to...
2004 Chevrolet Suburban 1500 LS 5.3L Cuts out, Stall, MIL Lamp on VIN: 3GNFK16Z04
truck came in fo intermittent stumble and stall code po336 rec cam and crank sensor cust agreed put sensors in had to replace cam because of bad sensor crank sensors still intermittently throwing the po336 checked voltage signal and low reference all seem ok t... Trouble codes: P0336
2007 Chevrolet Impala LTZ 3.9L compressor VIN: 2G1WU58R47
I have an Impala in my shop that makes a fluttering noise on decel ONLY with the a/c on coasting to a stop from about 35 mph to 5 mph. I also get an intermittant belt chirp when this happens. It sounds like the noise is coming from the compressor. otherwise th...
2002 Chrysler Town & Country (Van) LXi 3.8L power steering return hose/line VIN: 2C8GP54L12
Vibration is felt by driver.Verified return line/hose vibrating causing noise and vibration.TSB repair made no change.Check routing and was correct.This only vibrates after complete warm-up and not with wheels in straight ahead position.Makes vibration noise @...
2004 Chrysler Intrepid 3.5L Poor Idle Quality, Surge, Stall VIN: 2C3HH56G34
This car is very intermittant. At idle it starts hunting. This happens mostly when its warm but also will do from dead cold. It will idle for hours on end without fault but when you shut it off and restart it the problem may occur. No problem starting it when ...
2005 Chrysler 300 (Car) Limited 3.5L Cuts out, Stall, MIL Lamp on VIN: 2C3JA53G75
This Chrysler is randomly deactivating the throttle with no consistency. The throttle light illuminates ESP and BAS on with active code p2110. If I cycle the key it will reset but problem keeps popping up. I have tested the t-body wiring to PCM for shorts, vol... Trouble codes: P0430, P2110, P2101, C121C, C2100
1988 Dodge W350 5.9L indexing timing corr
ignition problem floating advance on original ignition box installed hei distributor normal advance curve. would like to know proper index of oil pump rod can install distributor and run. want to get ignition base timing exactly where it needs to be at tdc tha...
1990 Dodge Grand Caravan LE 3.3L Poor Idle Quality, Misfire VIN: 1B4FK54R0L
I am trying to figure out why this engine is only firing 4 injectors, #2 and #3 injector has no pulse from PCM. We have changed the PCM twice it now has a Mopar PCM. I can fire the injector by grounding the trigger wire at PCM connector and they will squirt fu...
2001 Dodge Dakota Sport 4.7L No Start, Poor Idle Quality, Stall VIN: 1B7HL2AN61
This thing is driving me nuts! About 3 weeks ago the Dakota came in for stalling. It would only start and run if you kept the gas pedal depressed. I replaced the IAC and the customer took it. It come back 3 days ago doing the same thing. I noticed this time th...
2004 Dodge Ram 1500 Truck ST 4.7L MIL Lamp on VIN: 1D7HU18NX4
sorry put message in repair history Trouble codes: P0440
2007 Dodge Ram 3500 Truck Laramie 6.7L MIL Lamp on VIN: 3D7KS28A87
Have code and when driving it will lose communication with moduis. Trouble codes: P0501
1985 Ford F-150 XL 4.9L Excessive Emissions VIN: 1FTEF14YXF
vehicle failed smog, for evap leaks, repaired and recheck failed due to high emission vehicle has 1051742 miles any sugestion
1994 Ford E-350 Econoline 7.5L downshift and upshift VIN: 1FDKE30G5R
Greetings fellow techs. This camper van has a shifting problem. Problem 1 is that it does start off in first but shifts to 2nd at 8kmh and then into 3rd at about 15kmh. Then no matter what speed you are at it will not downshift into passing gear. The tps, map,...
2003 Ford Mustang 3.8L calipers/front end
I have an '03 ford mustang that came in with a pull to the right when braking. Experience tells me that we have a problem with either a brake hose or a caliper problem on the left side. We replaced the front brake hoses first (caliper slides were ok and piston...
2011 Ford F-150 XL 5.0L diff VIN: 1FTFW1EF0B
Hi All 2011 F150 4 wheel drive with noise coming from front,, only when wheel is turned to the left..No noise going straight & no noise turning right..The noise is there in 2W & 4W but not all the time..Sounds like a shudder & mostly when you are starting from...
2003 GMC Sierra 2500 HD SLE 6.6L tempurature gauge says 240 degrees VIN: 1GTHK23193
First off let me say that this is my truck and that I am by no means a diesel tech. What I have going on here is that my truck is "overheating" according to the guage and my scanner. The temp gets to 240* after about 10 minutes of driving. Seems to get worse ...
2003 GMC Envoy SLT 4.2L air bags VIN: 1GKDS13S33
Customer stated the right rear air bag would deflate sitting just a short while, but would re-inflate quickly when truck was re-started. Has been doing this for about a year. Now both air bags go down, left slowly (overnight), but will re-inflate quickly. I ha...
2002 Honda Civic Si 2.0L MIL Lamp on VIN: SHHEP33542
This civic came in with code P1259 for vtec system circuit fault.Engine runs like it has a rev limiter, wont go over 3000 rpm. I pulled vtec valve and checked screen and it was very clean. I checked oil level good and doesnt appear to be any sludge I can see. ... Trouble codes: P1259 (Vtec system fault)
1997 Jaguar XJ6 L 4.0L intermittent VIN: SAJHX6244V
This car has the intermittent problem of the pedal failing to cause any throtthe activity. The pedal can be pressed tot he floor but nothing happen at the throttle body. I scanned it with an Autologic scanner and got values from 12.2 to 78 from both traces (en...
2004 Jeep Grand Cherokee Limited 4.7L Failed smog test VIN: 1J8GW58N24
I have customer with a 2004 Jeep Grand Cherokee. Failed smog inspection due to Evaporative system readiness monitor not setting. All exhaust gas readings are significantly below average and the vehilce is running clean with no drivability issues. No MIL light ...
2005 Land Rover Range Rover HSE 4.4L rf VIN: SALME11485
This was driven in for the passanger side would go down only when driving?? We scanned the system and the only code was 100 Articulation Validity Fault. We went ahead and cleared all codes and then set the car to regulation height. Let it set overnite and it n...
2002 Mercedes-Benz SLK320 3.2L Mechanical VIN: WDBKK65F22
no starter with the key on all dash lights come on and the aux fan goes to high speed with engine cold traced wires to relay in fuse box i have power in when you go to start mode but no power out can jump and starter will work but wont start replaced relay and...
2008 Mercedes-Benz CLK350 3.5L Crankcase VIN: WDBTJ56H78
Hi Mercedes tech and ALL!I have CLK come in for iol leak I find out oil leak from left camshaft end plug it was pop out by too much pressure!, and valve cover was reseal by some where. I replace new plug and check oil level but still pop out again after engine...
2001 Nissan Sentra GXE 1.8L Cuts out, Lack of Power VIN: 3N1CB51D91
This sentra is giving me a run for my money, it seems like it is running out of fuel, but fuel pressure and volume look good. When i give it gas it will just fall on its face. Like a plugged cat. I removed both upstream o2's and nothing changed. fuel trims at ...
2001 Nissan Pathfinder LE 3.5L Rear Crankshaft Seal VIN: JN8DR07Y31
I am preparing to replace the crankshaft rear main seal on this Pathfinder. Both Mitchell and Alldata say remove transmission and oil pan. I understand that the Rear Seal comes with the retainer which is bolted to the oil pan. I'm just wondering if it is neces...
1987 Porsche 944 S 2.5L All Electrical VIN: WP0AA094XH
Hello All -Customer Observation: Had to pull over for smoke bellowing out from under hood- electrical smoke from battery area and fuse box area. removed battery cables and smoked stopped. -I hooked up the battery, installed back the DME relay that was pulled...
2004 Saturn Vue 3.5L compressor VIN: 5GZCZ53444
this saturn came in not cooling good The low side is 70 at idle and the high is 150 if I raise the speed up to 2000 the low is around 55 and the high is around 175 the duct temp feels slightly cool with high rpm with the blower on low.The raditor fans are runn...
1989 Toyota Corolla DLX 1.6L timing VIN: JT2AE92E2K
18mo ago we replace timing belt and all was good until he needed a smog test car failed smog test because smog tech could not test engine timing. with timing connector shorted or without it seems to be the same. other than that the engine seems to run well and...
2006 Toyota Sienna LE 3.3L Misfire, MIL Lamp on VIN: 5TDZA23C46
Hello all. Thoughts on this issue. Vehicle came in with a light misfire. Also had multiple codes stored. Cleared codes and P0305 comes back immidiately. Misfire data shows a constant misfire count. Performed a tune up due to original plugs. Swapped coil to #6 ... Trouble codes: P0305, P0300, P0171 (Fuel system too lean Bank 1), P0174 (Fuel system too lean Bank 2), P0121 (Throttle/pedal sensor switch A circuit range/performance), P0420
2007 Toyota Sienna LE 3.5L Oil Consumption VIN: 5TDZK23C27
Van was brought in about 2 months ago, smoking on start up. We actually picked the van up from the dealer who had it for sometime. They first told him it needed valve seals, then needs a motor. He was told it was sludged up from not changing the oil, which he ...
2002 Volkswagen Beetle GLX 1.8L timing belt VIN: 3VWDD21C02
OK I'm putting the variable valve cam chain solenoid on this car. Tear down went good. The cams are out. I'm getting ready to go back together. The problem I'm having is that I can't seem to figure out how to get the engine mounting bracket back in position to...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2006 BMW 525i 3.0L water pump VIN: WBANE53576
thanks for all your help! YES the water pump did repair the problem. Thanks also for the tip on bleeding the system!! worked like a charm!
2007 BMW 328i 3.0L entire vehicle VIN: WBAVA33587
The car is fixed, and many thanks to all that responded. Yes I overlooked the bulletin SI B61 08 11. The vehicle did show signs of melted plastic connector at the back of the Junction Box A4010, behind the glove box. The cable in the plastic connector is th...
2005 Cadillac STS 4.6L engine mount VIN: 1G6DC67AX5
well since the front man put the estamite in we ate the additional labor time to avoid a problem.front man is now on a short leash..thanks to all who replied
1993 Chevrolet K1500 Cheyenne 5.7L Daytime Running Lamps / Autolamps VIN: 1GCEK14K1P
The customer had some tight time constraints so, this vehicle is shipped with working DRLs, but not by diagnosing and fixing the OEM system. We ended up installing a Blue Streak ET521 kit. This keeps the low beams on whenever the key is on, but still allows ...
1995 Chevrolet Camaro Z28 5.7L Misfire VIN: 2G1FP22P1S
I found a few vacuum leaks and repaired them but no change in the way it runs. Customer has taken it to drive. Thanks everyone for your help and thanks Gordon for your help. When I get it back if I find anything else I will let you know. Charlie
1999 Chevrolet Astro 4.3L oil consumption VIN: 1GNDM19W2X
Well as it turns out after talking to the customers husband the van is only burning 1 to 1.5 quarts between oil changes. The wife thought it was a lot more. They did say that it seems to burn more oil on long trips vs. just driving around town. The custom...
2004 Chevrolet Silverado 1500 5.3L Unknown VIN: 1GCEC19T94
Thank you to all the replies for this help. Great helps from Iatn and great people.Owner has no money and unable to pay for this diagnostic. owner pick up truck. Thank for all the advices, thoa [...]
1997 Dodge Intrepid ES 3.5L no spark or injector pulsse VIN: 2B3HD56F4V
well, most folks said that o.e. cam and crank sensors - but my problem seems to be the pcm. I put a used unit in and SO FAR - no problems - out of the 17 replies 1 or 2 were a bad pcm. Great tips - check harness connectors at rear of engine ( all good ) in fac...
2005 Dodge Neon SXT 2.0L Cuts out, Stall, Misfire VIN: 1B3ES56C55
Thanks for all the excellent advice guys.iATN is the best tool a tech can have because of all the great people out there who are willing to take time and help a fellow techs.I belive expierence is truly the best teacher. The fix was crankshaft position sensor.... Trouble codes: P0344, P0340, P0300.
1993 Ford Thunderbird Super Coupe 3.8L Cuts out, Stall, MIL Lamp on VIN: 1FAPP64R1P
thanks to the techs that replied. it was a bad ecu unit all tests pointed to ecu being bad. had to wait to get reman unit it has been a week now all is good thanks again.
1995 Ford F-150 Eddie Bauer 5.8L No Start, kills battery VIN: 1FTEX15H4S
Well i will make it short. The battery was bad and the one the cust braught us tested good but was not, so that was easy. After doing every test and check i could think of. We started changing parts. After changing the coil it fired right up. Apparently the ol...
2002 Ford Explorer XLT 4.6L Surge, Cuts out VIN: 1FMDU73W72
thanks to all that replied. After countless freeway test drives trying different things another mechanic in my area noticed new front tires. They were over a half inch taller than the rears due to wear. It was causing stress on the drivetrain at high speeds (a...
2005 Ford Thunderbird 3.9L Poor Idle Quality VIN: 1FAHP60A85
I fixed it!!! I would like to say the diagnoses for the P2112 code on this car is extremly decieving and difficult to interprit. It will lead you to believe the ECM is bad when in reality it is not. I tested the wiring and connectors on this car till i was blu... Trouble codes: P2104 (throttle actuator control forced idle), P2112 (throttle actuator control stuck closed).
1999 GMC K1500 Suburban SLE 5.7L Transfer Case VIN: 3GKFK16R6X
ARGHHHHH. I know the format for this forum is to post good results, but we weren't able to accomplish that. I just wanted to let the forum know our results (or lack of results). And I want to thank everyone for their comments. We tried everything suggested and...
1999 GMC K1500 Suburban SLE 5.7L No Start VIN: 3GKFK16R3X
I thank you ALL for your help in this fuel pump "saga". I have replaced the pump with an ACDelco unit, both relay and fuse for the pump. Checked voltages at the pump under load and amp draw, both are within spec. The most millage I got out out of a pump is 482...
2002 Hyundai Santa Fe GLS 2.7L No Start, long crank VIN: KM8SC73D92
Well, This customer was a serious case of anger management needed, she didn't want to give us time to do further testing, and wanted us to guarantee that the car be fixed, we couldn't. We did install a purge valve, even though every time we tested it showed u...
2005 Jaguar XK8 4.2L fluid leak VIN: SAJDA42C45
8 out of 8 said the same thing that was great and it worked like a champ. Thanks for all the help Duane
2004 Jeep Grand Cherokee Laredo 4.0L sway/ shift VIN: 1J4GW48S74
dont trust the shiny part! found left rear lower contloll arm rear bushing weak.was replaced by ? installed used arm all good.thanks
1991 Mazda Miata 1.6L No Start VIN: JM1NA3518M
Thanks for the help guys. Don't really know if I should post this as a fix or a summary though. I got the car running, but didn't exactly find a problem either. The thing that threw me was that occasionally it would start and seem to run fine for a few...
2002 Nissan Altima 2.5L Mechanical VIN: 1N4AL11D52
I didnt get any replies indicating this was a direct swap and given the emmmission problem though we arent an emmisions State per say, I have know idea where the car may end up. Im still looking for the correct engine for a decent price and thanks to a member ...
1992 Oldsmobile Custom Cruiser 5.7L Cust states a/c comp stops intermittantly. VIN: 1G3BP8376N
Something about the pressures didn't feel right, so another set of gauges confirmed the a/c system is in good working order. 240-245 high side and 45 low side pressures. High side does not go over 245 when idling for extended periods, very stable pressures. Cy...
1999 Pontiac Montana 3.4L Mechanical VIN: 1GMDX03EXX
Ok guys. First things first, I would like to thank some of you who gave me a straight punch in the face about trying to make "quick cash". I appreciate the fact that you guys were only trying to help fellow technicians not to make the mistake of not diagnosing...
2007 Suzuki Forenza 2.0L MIL Lamp on, loss of power VIN: KL5JD56Z97
what a wonder full team at iatn.every one of those reply had some thing to offer.finally we found a shorted wire on top of intake that was causing all the codes. Trouble codes: P2106, P2138.
2001 Volkswagen Cabrio GLS 2.0L Cruise Control VIN: 3VWCC21V71
Well...long story short, and hopefully you can sympathize with the long story portion that really did NOT need to occur, it was the Cruise Control Module. Lucky for me, another Cabrio came in for service and I offered to pay for the service if they'd allow me...
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