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Prev Professional Automotive Repair Technical Discussions for April 23, 2014
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2007 Acura MDX 3.7L accessories VIN: 2HNYD28357
Rattling / chattering noise from serpentine belt area. Noise begins after warming up for 3-5 minutes. Noise is at idle, goes away at 1300 to 1500 rpm. Similar to noise created when a large chunk of converter rattles. Much deeper noise than a heat shield. With ...
2004 Audi A4 Cabriolet 1.8L Unknown VIN: WAUAC48H74
I replaced the compressor because the front seal was leaking, as well as the R/D (car came in with the system completely empty). After the repair and completing with a full charge, the outer right and left vents are cold while the three center vents are cool, ...
2002 BMW 325Ci 2.5L locking VIN: WBABS33442
i am having trouble with the central locking system.Doors will not unlock. Code is 29 central locking relay but I can't find the location alldata or mitchell is no help.. thanks Mickey
2007 BMW X5 3.0si 3.0L Sunroof Drai VIN: 5UXFE43587
I have this X5 and it is leaking water on the passenger side sunroof. Diagnosed a clogged passenger side drain in the sunroof attempted to blow line out water is only trickling out and is not draining fast enough to prevent in car leaks have tried to blow line...
2007 BMW X5 3.0si 3.0L No Start VIN: 4USFE43517
hi guys, ive got an 07 x5 here 3.0l. car got towed in as a no start. customer said he was just driving along and the cR WENT DEAD. we scanned it and got a code for crank sensor signal inop. so we replaced the crank sensor. now the vehicle will still not star...
2002 Buick LeSabre Limited 3.8L No Start VIN: 1G4HR54K42
After repairs, vehicle will not start. Holding throttle at 100% allows engine to start, but very poorly. Sputters and bucks as well, and almost immediately stalls. Sounds like ignition wires were crossed, but have verified proper orientation via information on...
2008 Buick Enclave CXL 3.6L voice audio VIN: 5GAEV23718
OK... We are dealing with a strange symptom with no direction??? Fully functioning Radio, CD player, DVD player, speakers, video screen, rear controls, etc... Problem is when the "movie" finally begins.. there is no voice audio!! Music soundtrack and sound ef...
1996 Cadillac DeVille 4.6L MIL Lamp on, P0153 VIN: 1G6KD52Y2T
Bank 2 runs lean predominately at idle, but is still leaner than bank 1 at higher rpms. Car idles smooth and runs well under all power requests. Symptom is indicative of vacuum leak , however multiple smoke tests have not revealed any leaks. Maf has been swapp... Trouble codes: P0153 (Oxygen sensor slow response bank 2 sensor 1)
1996 Chevrolet Blazer 4.3L Ignition and Fuel Pump operation VIN: 1GNDT13W9T
Hello - Good Morning, Thank you for your help. ***. Guys, this is an old age unit - a 96 model Baby Blazer with the 4.3L 4x4 power plant. We detached the positive battery cable - first. We resealed the intake manifold - upper and lower. We renewed the oil p...
2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK231X4
Changed all glow plugs with o.e. Parts, code reoccured after approx 3 starts. Checked for output to the glow plugs,no voltage. Had b+ and ground at the glow plug module. Replaced module, cleared code, 3 starts later, code reoccured. This time i have voltage at... Trouble codes: P0380 (Glow plug heater circuit problem)
2006 Chevrolet Express 3500 LT 6.0L fuel guage VIN: 1GAHG39U96
Fuel guage reads empty and fuel light is on. Replaced the fuel pump assembly. Had assembly out and plugged up. Moved lever and it worked. Put it back in car and it does not work.
2007 Chevrolet Malibu Maxx LT 3.5L 1-2 VIN: 1G1ZT68N57
No Codes present. Car has second gear start, all solenoids appear to function and have proper resistance. Noticed that when in drive and brake on, first gear is commanded (1-2 solenoid on, 2-3 is off) as soon as wheels start to turn the second gear is commande...
2009 Chevrolet HHR LS 2.2L Compressor VIN: 3GNCA13B09
Vehicle cools great when started, but after driving blows non-conditioned air. Compressor still operates. High and low side lines are the same temperature to touch when not cooling and high hot and low cold when working. Installed ac delco expansion valve with...
2001 Chrysler Sebring LXi Limited 2.7L instrument cluster VIN: 1C3EL65U41
Hello. Ok,having trouble getting this diagnosed and would appreciate any help. Instrument cluster goes dead when running, only activity is the seat belt, coolant, low fuel and brake light blink about once every two seconds...just enough to illuminate the bulbs...
2003 Chrysler PT Cruiser 2.4L Radio VIN: 3C4FY48B43
Hello everyone and thanks for helping with this bizarre problem. I have the 03 PT cruiser in that has a radio that will only work in the Accessory position of the ignition switch no in the Run position. Someone has put in an aftermarket lock cylinder it appea...
2010 Dodge Ram 1500 SLT 5.7L No Start VIN: 1D7RV1CT8A
Truck does not crank, there is no codes. I can remove starter relay and jump the 2 terminals and truck will crank and start so I know that the relay is not being energized. I do have 12 volts on the "switch" side of relay but only 4.9V on the control
1999 Ford F-150 Lariat 5.4L Poor Idle Quality, High Idle Always VIN: 2FTRX18L9X
Car came in with an IAC code and would not idle by itself. Replaced IAC with a Factory part . Car will idle now but does not come down from 1000-1100 rpm . Fuel trims both sides are near perfect about 0 . Throttle position status reads C/T on the scanner. IAC ...
2003 Ford Focus ZX5 2.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3FAFP37383
Help Ford Techs! This focus came in with multiple misfire codes for various cylinders and p0316- misfire during first 1000 rpm after start up. customer states it will misfire once started cold- mostly in cold weather. We replaced the coil, plugs and wires with...
2005 Ford F-150 FX4 5.4L vct VIN: 1FTPW14505
When you de-cell or take off the engine starts missing and carry-in on like its out of time - usually warmed up but sometimes not - oil pressure stays with-in specs - if i unplug 1 vtc it all straitens up and runs great - its like the vtc sensors cause the pro...
2006 Ford F-250 Super Duty XLT 6.0L Steering VIN: 1FTSX21P76
As always, I appreciate any help with this one. Customer came in with complaint steering jerking one way or the other while going straight down the road. Road testing, I noticed steering would pull either right or left while going straight down the road. On oc...
2008 Ford F-350 Super Duty XL 5.4L No Start VIN: 1FDSF30548
I have a fleet truck that needs an ECM, This truck is owned by the telephone company. It has a non-chip key and No transponder! So when I do a PMI the PATS system shuts me down. I did do a as-built data on the ECM with the same results. Now I can install the o...
2011 Ford F-150 STX 3.7L No Start VIN: 1FTEX1CM3B
thank you in advance for any ideas on this nightmare. truck towed in quit while driving instrument panel was messing up.hooked snap on scanner cant communicate with bcm,pcm,rcm,abs,instrument panel,retrieved codes from accessory protocol interface module. chec... Trouble codes: U0100, U0151, U0422
2004 GMC Sierra 1500 SLE 5.3L Vacuum assist VIN: 2GTEK19T64
Customer complaint is an intermittent hard brake pedal when applied. Vacuum brake booster has the "Supplemental Brake Assist" vacuum pump at booster. No warning messages such as "Reduced Brake Power," "Service Brake Booster" or "ABS" are being displayed. No co...
2005 Hyundai Tucson LX 2.7L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: KM8JM72D75
this beast will stumble and stall after cold start up and brisk acceleraton. This happens after first accel and a block later it stumbles, stalls. Will start right up and runs perfect for rest of day. I can never get it to act up. I do have some mode 6 data bu... Trouble codes: P0306 (6 misfire)
2004 Jeep Wrangler Unlimited 4.0L steering VIN: 1J4PA49S24
When driving the jeep, you get a severe vibration/shaking at 62-70 mph. Any speeds below 60 the jeep drives fine. The parts replaced were worn and had excessive play/slack in them, but the shaking is still there! It's very much like the "death wobble" we've al...
2009 Kia Sportage LX 2.7L Compressor VIN: KNDJF72339
Thanks to all who help to shed some light on this. Client states that ac blows cold with blower on spee 1 and as soon as you change the blower speed to anything other than speed 1 the ac light on the climate control unti turns off and the ac stops blowing cold...
2006 Land Rover Range Rover Sport HSE 4.4L wipers / drivers seat VIN: SALSF25496
vehicle was brought in with 2 problems 1 drivers seat inop 2 wipers only work on high checked for codes and none found checked fuses and all are good ,, i have a scanner that was able to read the wiper switch and it shows the switch working but the wipers ...
2008 Land Rover Range Rover Sport HSE 4.4L Can VIN: SALSK25428
One of my techs installed a new battery in this car and it didn't make it out of the parking lot before multiple warning lights came on. It has a total of 23 codes in in 7 different systems. Audio cntrl module, all terrain cntrl module, BCM, HVAC module, inst ...
2003 Lexus LS430 4.3L ABS module VIN: JTHBN30F03
Hi Fellows! We normally deal with European cars only.But this is my uncle's vehicle and he want me to take care of it too. After driving for )30 feets with the brake applied. You will see the VSC off light and red traction light are on and can't be turned off....
1990 Mazda MPV Cargo 3.0L No Start VIN: JM3LV5221L
Hi every body, i need help with this mpv mazda, 3.0 engine. Customer states engine crank doesn`t run, he tryed repair him self, replaced spark plugs, pcm from junk yard, new distributor and new ignition coil. Engine cranks ok, but doesn`t have spark, and injec...
1993 Mitsubishi 3000GT VR-4 3.0L Poor Idle Quality, Hesitation, MIL Lamp on, Lack of power VIN: JA3BN74K0P
Vehicle was towed in with this symptom, there was no chec engine light and no codes. Ran some tests and found that pcm had a burnt driver. The wave reading for map sensor and other inputs where irratic. There was communication to pcm, but no codes where set. R... Trouble codes: 41 (Injector circuit problem)
2000 Mitsubishi Eclipse GT 3.0L Heat output VIN: 4A3AC84L7Y
This car originally came in with an issue with low heat output. The symptom was lack out heat output. We opened up the cooling system and found rusty nasty coolant or maybe just water not totally sure. We flushed system for about 4 days total. After all that t...
1998 Nissan Maxima GLE 3.0L No Start VIN: JN1CA21D7W
We have this 98 Nissan Maxima 3.0L with a no start condition.We have fuel pressure but only have spark on cylinders 3 and 6.We have tested everything we can think of.Tried both crank sensors,cam sensor and even had the computer rebuilt?We have cleaned up every...
2002 Pontiac Grand Prix SE 3.1L Temp Guage VIN: 1G2WK52JX2
We received a car from a customer whom let another person repair her temp guage that was stating car was hot, reading 260, when in reality it was 190 degrees. This person took and removed the ect and discarded, ran a mechanical guage to that port and then dril...
2005 Toyota Tundra SR5 4.7L MIL Lamp on VIN: 5TBET34155
Thanks for any help you can give me. This Tundra came in to the shop right before closing. I haven't had a lot of time to look in to it, but I was hoping some of you can give me some pointers, so I can go to work tomorrow, with some ideas. This Tundra came i... Trouble codes: P0016, P0018
2008 Volvo S80 T6 3.0L Differential VIN: YV1AH99228
Help Volvo Techs! We have this s80 awd with a customer concern after vehicle warms up and accelerating from low speeds he can hear a tapping noise that increases with road speed up to 25 mph and then at freeway speeds will shutter when accelerating. He also st...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2001 Acura MDX Touring 3.5L MIL Lamp on VIN: 2HNYD18691
thanks for all the input guys!!! pulled the injector rail and did a koeo and man were they plugged, funny thing is no drivability! replaced ALL injectors and car passed smog with all monitors run!! thanks again!
2007 Audi A6 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WAUAH74F57
Many many thanks to Phillip of California. We swapped the cam solenoids side to side one at a time until, ta dah, the misfire moved with the exhaust solenoid. Stuck a new one in and all is well. I cannot say thanks enough on this one... Trouble codes: P0300, P0301, P0302, P0303, P0366.
2003 BMW 325i 2.5L Hesitation, Cuts out, Misfire VIN: WBAET37483
I have to close this request. I tried a MAF even though it tested good I replaced both Upstream O2 sensors repaired the disa valve And reprogramed the DME. Nothing has changed a thing. What really gets me is that if I unplug both upstream O2 sensors it runs pe... Trouble codes: 2974 (O2 upstream interuption), 2973 (O2 upstream interuption).
2000 Cadillac Catera 3.0L Poor Idle Quality, Cuts out, Stall, Misfire VIN: W06VR54R7Y
ok removed #6 spark plug and found bent electrode. replaced pluga nd reinstalled coil pack. misfire no longer evident but irratic idle. checked connector at electronic throttle body if wiggle it idle becomes smooth. recommended tb and connector. Trouble codes: P0302, P0304, P0306, P0100.
1998 Chevrolet Monte Carlo Z34 3.8L Hesitation, Misfire, MIL Lamp on VIN: 2G1WX12K1W
First thing that was wrong the dorman intake was leaking from the inside intake runners the plasic mold was hitting the alt ang keeping the manifold kicked to the far side and the second problem was the o2 reporting lean hitt it with propane no change. Thanks ...
2011 Chevrolet Silverado 1500 LT 5.3L Trailer brake VIN: 1GCRKSE31B
The issue turned out to be a bad connection at the dash switch. The wires dragging on the ground were from an accessory which the customer removed which appeared to be OE sending me down the wrong path. Thanks to all the techs who helped. CHEEERS!!!
2002 Chrysler 300M 3.5L Need service number VIN: 2C3HE66GX2
well after you guys woke me up we got it going. used my scanner to pull calibration number from old module, got it programmed into new module and everything is fine. thank you again for taking the time to help.
2002 Dodge Grand Caravan EL 3.3L Excessive Emissions
I had already checked ect , it was ok. customer put map, sensor and fuel pressure regulator on it. just after I posted this I ran the car ans was looking at o2 sensor and the upstream one was going crazy, so ed was right, upstream o2 fixed it. thanks
2000 Ford E-450 Econoline Super Duty Custom 7.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1FDWE45F0Y
Well the run issue is fixed on this van! The IPR was indeed faulty, when running it was being commanded at 5%. With the ICP as high as it was it had to have been stuck. I swapped in a known good used one and it started and ran perfect. Once fix was verified i ... Trouble codes: P0470, P1211.
2008 Ford Escape XLS 2.3L steering angle sensor VIN: 1FMCU02Z68
Hello and thanks for the replies. After replacing the steering column and having pscm configured and steering angle sensor calibrated it works good. I learned next time on one of these I will just replace coumn right away as it contains every part to the syst...
2004 GMC Yukon SLE 5.3L abs VIN: 1GKEK13Z44
After some exhaustive Googling I finally found what I needed, here it is: Looking at the ABS unit facing the ports, Starting from the left: TOP ROW: Left front; Right Front; Left Rear; Right Rear Second Row: Front Master cylinder; Rear Master cylinder The ...
2006 GMC Sierra 2500 HD SLT 6.0L No Start, Stall VIN: 1GTHK29U86
Two Words. RATS NEST That's why I could not communicate with ECM and why would run on starting fluid. I knew that it was something weird about what was going on with this truck. I just didn't have the time to take on this job that's why we sent it to dealer.
1998 Honda CR-V EX 2.0L radiator gasket VIN: JHLRD1861W
The techs who responded all recommended that I replace the radiator rather than repair it and I have accepted that advice. I looked @ 1-800-radiator but eventually decided to install an OEM radiator by Denso which was available from Amazon. After market radia...
2002 Honda Accord Value Package 2.3L No Start VIN: 1HGCF866X2
Vehicle is gone and somehow I thought I had closed this request. I ended up replacing the crank sensor and the vehicle started and ran well. There was one report that the crank sensor has nothing to do with spark and injector pulse but the final solution was...
2001 Jeep Grand Cherokee Laredo 4.7L fan VIN: 1J4GW48N21
Thank you everyone, I replaced the pump with a factory part. As well they sent me the wrong fluid, so I got the right fluid from them, bled the system, . Everything is working. Thank you again for all the help.
2007 Mercedes-Benz E320 Bluetec 3.0L catalytic converter VIN: WBDUF22X67
We did not get the cat monitor to run. We test drove hundreds of miles and followed the drive cycle advice given on this forum, factory cycle and also the local dealer's advised cycle (20 sec of full throttle for three consecutive trips) and nothing worked. ...
2001 Nissan Maxima GLE 3.0L Ecu VIN: JN1CA31DX1
It was the iac shorted thanks for all the help it cut the time in half looking for this problem
2005 Nissan Titan LE 5.6L Door actuator VIN: 1N6AA07BX5
Well good old Mitchell has it wrong again. For the defrost actuator all you have to do is what Stephen and Delaney stated is remove the amp and then you can at least see it. According to Mitchell again the box above the pedal is listed as the BCM. I didn't rem...
1990 Oldsmobile Cutlass Ciera 3.3L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1G3AJ54NXL
Took all the info and went to work. After replacing the bad parts as stated in my update the car actually idled but it still had a lean condition. I rechecked the injectors for correct ohms that Kim & Avinash stated which all tested at 12.3. Thanks for that in... Trouble codes: 34 (MAF Circuit).
2006 Porsche 911 Carrera 4 3.6L MIL Lamp on VIN: WP0AA29956
Thank you all for your input on this Porsche. The fix was a wiring problem. A family of mice made there home in the conduit that protects the harness in the drivers side sill over the winter.They had chewed the wiring enough to get continuity but would not car... Trouble codes: P0447.
1995 Saab 900 SE 2.5L anti theft VIN: YS3DF75N2S
thanks for all the info,but it looks like anti theft is not the only issue.i jumped the wires that interupts the starter and the vehicle is not sparking and appears anti theft system does not kill the ignition according to schematic.probably just another lady ...
2003 Saturn L200 2.2L No/low heat VIN: 1G8JU54F13
Thanks all and especially Eddie! I made a careless error-this car has a cable that controls the blend door and I was thinking actuator. The controller was broken at the point of cable attachment only allowing limited movement. Thanks again,Greg
2004 Subaru Legacy L 35th Anniversary 2.5L compressor VIN: 4S3BH625X4
Thanks for the help. The trouble was the Evaporator temp Sensor.The way the system works is the ets feed voltage to the ecm to turn on the compressor relay. i was not getting the voltage signal to the ecm traced to ets. If I put 12 volts on the ecm the compres...
1998 Volvo S70 2.4L Excessive Emissions, MIL Lamp on VIN: YV1LS5544W
Well, it looks like this one is fixed. John, Derrick and Joe nailed this one. I scoped the crank sensor and the pattern didn't look to great, had a couple of erratic pulses. Tried a new sensor since they were pretty inexpensive, and it looked much better. Drov... Trouble codes: P0301, P0302, P0303, P0305, P1310.
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