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Prev Professional Automotive Repair Technical Discussions for March 28, 2013
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1997 Acura RL 3.5L Misfire, MIL Lamp on VIN: JH4KA9658V
car came in for check engine light on and running rough.Found code for number 2 misfire.Check plugs which were original and #2 had burn marks like arcing out.Replaced plugs and ran good till gets warmed up then at idle it runs rough.Check short trim and bank 1... Trouble codes: P1202
2004 Audi A6 Quattro 4.2L Right Side Catylist
Hello audi guys , trying to change right side catalytic convertor on this a6 i can see the bottom nuts that hold the cat to the manifold but im having difficulty figuring out how to get to the top nut any tips on this problem would be appriciated i know im mis...
2007 Audi A3 2.0L Misfire VIN: WAUHF78PX7
In past 1 year and 4 mos this vehicle had misfire issues. Initially we changed all 4 plugs and coils with OEM as it is common. Did air filter and mass air cleaning. Seemed to clear up. Then came back running badly a month later. We found bad High Pressure Fuel... Trouble codes: P0300, P0301, P0302, P0303, P0304
2001 BMW 330Ci 3.0L 2nd Gear VIN: WBABN53411
So as you can see this vehicle has had its share of failures within its drive train my problem is that starting at the very begining the since the clutch replacement the customer continually complains of the vehicle poppling out of gear. Now I do have to note ...
2002 BMW 530i 3.0L Poor Idle Quality, MIL Lamp on VIN: WBADT63432
Hello fellow iatn members, i am at a dead end and need some help. This vehicle idles at about 950-1000 rpm at idle whether in [...] or drive. I know there is no vacuum leaks for i have checked with my smoke tester. I even had a guy come out and do a reflash to ... Trouble codes: P0505 (Idle rpm plausibility leakage)
2005 BMW 645Ci 4.4L Starting VIN: WBAEK73495
This car came in from another shop with no start. I pulled faults( 2f45 interface ews-dme, 2f44 ews preventing manipulation, 2deb power management). I realigned ews(cas) and dme and cleared faults. The car started right up and charging system looks ok, around ...
1995 Buick Riviera 3.8L Poor Idle Quality, Misfire VIN: 1G4GD22K3S
Vehicle came into the shop running very rough at idle. We hooked up scan tool and found the the stft 182 counts and ltft 149 counts with an o2 sensor reading of 13 MV. Idle smooths when propane is added to air stream and fuel trims come down with o2 reading in... Trouble codes: P0740, P0171, P0131
2000 Buick Regal LS 3.8L Trac Control VIN: 2G4WB55KXY
Looking for information on the Variable Effort Steering. I'm getting a code c1241. I'm also getting a c1232 left speed sensor open or shorted. When monitoring the left sensor with a scan tool it shows as good. Also when cycling the ignition key from off to on ...
1996 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: 2G1WL52M0T
This car came in just over a week ago for a surge/misfire issue. Car ran ok so we went to the plugs. Original plugs so they were changed, test drove and all was good? Cuat. picked up car made a couple blocks and the surge/misfire was back and the SES light cam... Trouble codes: P0131 (low o2 activity), P0171 (lean bank 1), P0300 (multiple misfire)
2002 Chevrolet Avalanche 1500 5.3L Misfire, MIL Lamp on VIN: 3GNEC13T32
this truck came in with a steady misfire cylinders 5 and 6 more pronounce cyl 6 we swaped the injector #3 to 5 and 4 to 6 no change installed a new coil,wire and spark plug took compression test 150 lbs on all cylinders the injector signal looks good also remo... Trouble codes: P0305, P00, 306 (misfire cylinder number 6)
2004 Chevrolet Malibu LS 3.5L Rear VIN: 1G1ZT548X4
This malibu has a rattle in the rear end going over small or large bumps, you can hear it as slow as ten mph. It sounds just like a sway bar link rattle. Its not a sway bar we removed it noise is still there. All control arm and trailing arm bushings are good....
2005 Chevrolet Trailblazer LS 4.2L Mechanical VIN: 1GNES16S45
Customer brought this Trailblazer in for a noise. Put on the rack and ticking noise sounded like coming from the transmission pump area. Dropped pan and there was a lot of metal shavings in the pan. Pulled transmission tore down and found wear on the converter...
2007 Chevrolet Avalanche LTZ 5.3L Misfire VIN: 3GNFK12347
This engine only misfires on #5 cylinder when the computer commands 4-cylinder operation mode. Once it trips the code P0305, it won't command 4-cylinder operation and doesn't miss again. Not sure if you can feel the misfire when it acts up because it runs roug... Trouble codes: P0300 (multiple cylinder misfire), P0305 (Cylinder 5 misfire), P0171 (lean bank 1), P0175 (rich bank 2)
2007 Chevrolet Impala LS 3.5L No Start, died while driving VIN: 2G1WB58N17
this impala was towed in. died at cruise. cranks but no start. runs on carb spray in booster nipple. have 55 psi fuel pressure. have 12 volts to injectors on pink/black wire. have no ground signal to any injectors from ecm. tried new factory crank sensor made ...
2005 Chrysler Town & Country (Van) Touring 3.8L blower mtrs,radio,wipers,interior lighting, VIN: 2C4GP54L85
Hello, I got a wierd one hear.Cust. complains intermittenly when applying brakes that all electrical items shut off.This can be seen clearly in radio and blower operation.I have been able to recreate this myself.Blower and radio along with every other electric...
2009 Dodge Grand Caravan SE 3.3L Starting VIN: 1D8HN44EX9
Van towed in for no crank no start.tested batt weak and cable end broken,repaired and still nos start.perform batt reset,still no start.this van has a fobic and a wireless ignition node (win)only have one fobic to work with at this point.notice when insert key...
1998 Ford Windstar GL 3.8L no shifts VIN: 2FMZA5144W
I just bought this van and a week after i bought it the speedometer stopped working and the shifts were erratic so followed all the steps in alldata and confirmed a bad vss now the transmission will not shift after it has been sitting at idle in park for 10-15...
2002 Ford F-350 Super Duty Lariat 7.3L odometer VIN: 1FTSW31F62
After having the batteries unhooked to replace the injector cups,some how the odometer changed from english to metric. the speedo is not electronic but the odometer is. the only reset is for the trip meter. not sure what happened. my scan tool does not have an...
2003 Ford Taurus LX 3.0L control head VIN: 1FAHP56S53
car came in with no cooling, temp blend door would not move so we replaced it, still no cooling, replaced control head , still no cooling. anybody got any idea's what to check next?
2004 Ford F-350 Super Duty XL 6.0L No Start VIN: 1FDWX37P14
This truck cranks but will not start, I tried wd-40 to help it but still not even a cough. I can hear the injector buzz, I also noticed the ipc duty cycle is 85% with a desired pressure of 1300 psi and the pressure sensor shows .24v and no pressure from hpop, ...
2007 Ford F-250 Super Duty XLT 6.0L Oil Leak At Anti Bleed Off Valve,On Front Cover. VIN: 1FTSW21P57
We replaced rubber o-ring from ford on valve. We did install some right stuff silicone on threads. Test drove truck 50 miles and a small leak was starting to come out of valve again. Ford says they have never seen this before. Any ideas what to use on the thre...
2003 GMC Envoy XL SLT 5.3L Engine VIN: 1GKET16P43
Hi everyone and thanks in advance for any help. A customer brought me her recently purchased 2003 Envoy XL (5.3 L). Her complaint was no heat. I immediately checked the coolant level and found it to be 3 litres low on Dexcool. As soon as I diagnosed this a lig...
2004 GMC Envoy SLE 4.2L Mechanical VIN: 1GKDT13SX4
Hey guys p0410 replaced pump i heard it go on for a second is this normal i know could be a dumb question and if so is this how it works thanks guys
2005 Honda CR-V EX 2.4L fuse 9 under hood VIN: JHLRD78845
Help Honda techs! This CRV is a freind of one of our employees- trying to help on the cheap! Vehicle has a 150ma draw on fuse 9 under the hood. We disconnected instrument cluster (in diagram) and draw was gone. Sent the cluster out for testing- Unit is ok with...
1994 Jeep Cherokee SE 4.0L No Start VIN: 1J4FJ28S8R
towed in crank no start. no spark, no rpm signal in pcm with scan tool data stream. checked crank sensor voltages, 5 and 8.3 volts and a ground from center sensor wire. replaced crank sensor 2 times 1 factory sensor. replaced engine controller w/rebuilt and st...
2002 Jeep Grand Cherokee Overland 4.7L Electronic VIN: 1J8GW68J42
i inherited this jeep after a coworker put valve cover gaskets and now the transmission is going into limp mode.scanning the trans module i intermittenly lose data on the scanner.its setting a code 1698 and setting a code 120 in the trans module.i have checked...
2007 Jeep Liberty Sport 3.7L mil lamp VIN: 1J4GL48K67
Hi Guys This car is running rough. Has p0300 and others. Figuring out what is causing it to misfire is easy. The trouble I'm having is the MIL is not lit with the engine running. The MIL is on with KOEO. No MIL with KOER with codes stored in PCM. It had 4 c... Trouble codes: P0300
2009 Jeep Compass Sport 2.4L MIL Lamp on VIN: 1J4FT47B19
Hello Techs. This Jeep has two codes P2017 and P2004. Having to do with the intake manifold runner control. I have read that you have to replace the intake manifold to fix this problem. Has any body done this replace the manifold? My Solus does not have any tr... Trouble codes: P1217 (intake manifold position sensor high), P2200
2005 Kia Sedona EX 3.5L Hesitation, low power VIN: KNDUP13285
According to customer this kia starts to lose just about all of its power however it wont skip or pop. The van was able to go only about 10mph It will only do it in about a 20 min drive after it sits a half hour it will act like normal. This has happened 3 tim...
2006 Land Rover Range Rover Sport HSE 4.4L MIL Lamp on VIN: SALSF25476
we have tryed every thing please help it runs great but sets fuel trim codes every time with in 3 miles. or even at idle u can see short term trims at 3 to 5 posi long term bank 1 at 10 to 12 bank2 at 12 to 14 posi please help!! Trouble codes: P0171, P0174
2005 Mitsubishi Endeavor LS 3.8L turn signals VIN: 4A4MN21S15
Turn Signals do not work, 4 ways also dont work, checked wires, replaced turn signal switch and ETACS module still nothing
2002 Nissan Pathfinder SE 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JN8DR09X82
good moring fellow techs got a problem child here 2002 nissan pathfinder 3.5l idle issue ok car came in with a no start no idle issue check engine light on. pulled codes po455 po139 p1147 po158 evap code and o2 sensor codes so i smoked tested the air and eva...
2009 Nissan Versa SL 1.8L Unknown VIN: 3N1BC13E59
Hello everyone. Got a weird knock noise out of the motor on light acceleration. Tried oil change, belt and tensioner with no change. It is hard to pin point with a stethoscope. Not due for plugs till 105,000 miles. Decarb was done 15,000 miles ago with idle le...
2011 Nissan Altima 2.5L MIL Lamp on VIN: 1N4AL2AP1B
hello everyone, we have agrandma driven 2011 altima here that ..once a week will pop a maf code p0101. allready replaced maf due to iat reading high, cold koeo...when it left w new maf temp prob was solved. however .. p0101 still pops at about 65 degrees ect ,... Trouble codes: P0101
2000 Pontiac Grand Am SE 2.4L Parking Lights VIN: 1G2NF52TXY
Need wiring diagram right side fuse block and or pin out for parking light circuit for right side fuse block to parking lights. And or help on where to look for short
2002 Pontiac Grand Prix GT 3.8L Hard start VIN: 1G2WP52K32
Hi Guys, This car came for a hard start and a stalling while stopped.No codes stored. Traced problem to no injector pulse for about 3 seconds of cranking. Checked grounds ( voltage drop),everything appears to be operating normally. I have no scope at the momen...
2006 Porsche 911 Carrera 4S 3.8L Motor VIN: WP0AB29996
Customer said while driving down interstate he started to hear a whining noise. No check engine light came on and did not run hot. But all of a sudden vehicle started to smoke heavy out drivers side exhaust. Had it towed after that upon inspection drivers side...
2006 Porsche Cayenne S 4.5L Mechanical VIN: WP1AB29P56
Hello Porsche Techs, We did a brake job on this Cayanne S and we used factory brakes on the front and aftermarket on the rear. The front squeak and the rear are fine. The front pads click (loud) as you back up or go forward. The right front is the loudest with...
1998 Subaru Legacy Outback 2.5L shift VIN: 4S3BG6851W
hello group, I have this subaru I have installed a motor into. I got the thing on the road and am getting a p0720, temp light flashing 16. when u first take off it seems to stay in first to long, does not matter hot or cold for the first shift after startup, t...
2003 Subaru Impreza WRX 2.0L No Start, Misfire, MIL Lamp on VIN: JF1GD29683
This turbo charged Subaru fuel floods at cold startup. Has to sit all night for it to happen, sitting almost all day in the shop starts fine, no issues. In the AM is very hard to start, when it does has misfires and rough run from the fuel. ECT showed 50 degre...
1998 Volkswagen Beetle TDI 1.9L No Start, Hesitation, Cuts out VIN: 3VWBF61C4W
Car had an engine swap at another shop, client brought car to us to check injection pump with VAG. Car would not start, had codes for glow plug control. We started it with ether. While using VAG, we could not see the pump timing on the graph at all. We did hav...
2003 Volkswagen Jetta TDI 1.9L relay 109 VIN: 3VWSP29M33
The car came in from other shop thy replaced relay 109 (power supple relay) with a toggle switch. problem is if you forget to turn switch off the battery go's dead then you can not get in the car. the relay is not turning on because the computer not grounding ...
2007 Volkswagen Jetta 2.5 2.5L electronic traction control VIN: 3VWHG71K67
Thanks in advance all. I have a 07 VW Jetta 2.5 that we replaced both front hub/bearing assemblies on. After repair, vehicle was road tested. during road test, on accel, the ETC light would start flashing and throttle function would cease. Once vehicle was aga...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2002 Acura RSX 2.0L MIL Lamp on VIN: JH4DC53882
OK, after removing valve cover i discovered the problem. First off there were 2 missing bearing cap bolts as well as a chewed cam lobe on another cylinder and another broken bolt and some only hand tight. This customer had just purchased this car and obviously... Trouble codes: P1259 (Vtec malfunction).
1991 Buick Park Avenue 3.8L No crank VIN: 1G4CW53L1M
Thanks for everyone who took time to reply. The final fix was making a resistor of equal value to that in the key. A comedy of errors caused me to make a new resistor. First the origonal resistor I made did indeed break causing an open circuit and secondly spl...
2001 Buick LeSabre Custom 3.8L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G4HP54K21
Thanks for so many replies. We ran test after test. We followed up on all responses even though we had as stated already checked some of them. We called Identifix and eventually found our issue. The aftermarket harmonic balancer the customer had installed was ... Trouble codes: 1374 (Cam/Crank correlation).
2006 Buick Rendezvous CXL 3.5L 5 volt reference VIN: 3G5DB03L26
I found connector C305 outside under the drivers seat holding water/salt after it was unplugged, literally water came running out. I could not find any breaches in the seals though and there is two other connectors attatched to it that had no moisture intrusi... Trouble codes: P0641 (5 volt reference circuit 1).
1994 Chevrolet Cavalier RS 3.1L Poor Idle Quality, Hesitation VIN: 1G1JC84T1R
Before reading any replies, we decided to try replacing the ignition module and coils on the engine since we keep good used spares on hand. This did nothing except waste a few hours time! So on everyones advice, I popped the upper plenum TOTALLY off (as in of...
2000 Chevrolet Cavalier 2.2L Unknown VIN: 1G1JC5244Y
The vehicle had a small transmission line leak. The fluid was low. I replaced the lines and topped off the fluid and all is well. Thank you all for your help. You guys are the greatest.
2002 Chevrolet Trailblazer LS 4.2L 4x4 VIN: 1GNDT13S22
well I decided to fix the c0379 first that ended up being an acuator ( water damage ) cv shaft ( bearing in acuator housing destroyed ) and replaced the housing with shift fork gears etc. destroyed internally. That got the front axle to work via snapo...
2004 Chevrolet Suburban 1500 LS 5.3L Rt Outside Mirror VIN: 3GNFK16Z84
Talked to dealer and they said it had to be programmed but Mitchell and Alldata say no.Only if truck has camper mirrors. I disconnected battery for 10 min. and corrected problem. Thanks for all your help.
2005 Chevrolet Astro 4.3L Fuel & Batt gauges, warning lights, PRNDL VIN: 1GCDM19X45
I called my customer to schedule another appointment to perform some of the tests recommended by other IATN members. He said that "the instrument panel was acting normal as of three days ago". The van belongs to an electrical contractor I work for a lot so t...
2006 Chevrolet Impala LTZ 3.9L Heat VIN: 2G1WU58116
Thanks to all who replied, The coolant was low but much more than I first thought, when I first added it didn't take much, but after all the replies about how hard it is to get air out because heater hoses are higher than cap I decided to remove heater hoses a...
2005 Chrysler Pacifica Touring 3.5L timming belt VIN: 2C4GM684X5
this one was difficult but we got it thanks for all the post we rechecked the timming several times and it was good took some advise from iatn and replaced the cam sensor and the bucking and jerking went away we still had a code p0016 we read here on iatn abou...
2005 Dodge Ram 1500 Truck ST 5.7L transfer case VIN: 1D7HU18D35
2009 Dodge Ram 3500 Truck SXT 6.7L 4th-5th-6th gears VIN: 3D7MX49L49
Looks like Bad PCM on this 68RFE. PCM will not ground OD solenoid when commanded to do so. Shift strategy is as follows; has 5-solenoids one for UD 1-2-3, one for OD 4-5-6. Other 3-solenoids complete complete 1-2-3 or 4-5-6 depending on whether OD or UD is ...
2000 Ford Expedition Eddie Bauer 5.4L Poor Idle Quality, Misfire VIN: 1FMPU18L4Y
wish I could say that I found a FIX for this Ford truck, but it was not to be. I suppose with all the problems this vehicle had, the best fix would have been a shoulder fired explosive device with a 2x warhead. I did find out something strange, and that is, ... Trouble codes: P0174 (Bank 2 too lean), P0301 (Misfire cyl 1).
2006 Ford E-350 Super Duty 5.4L Instrument Cluster VIN: 1FDSE35L56
Thanks for the suggestions i tried them all.Couldn't find the problem so i took Kents advice and put in a circuit breaker in place of the fuse for now.Hoping to find the problem when it becomes more frequent.
2009 Ford Escape XLT 2.5L Steering VIN: 1FMCU03719
Thank you for all the input. Most all indicated steering column replacement. Customer will think about it. Seems fine for the past few days since I ran a recalibration.
2010 Ford Fusion SEL 2.5L Air Bag VIN: 3FAHP0JA4A
First of all thanks for the suggestions. Each of you were all over the problem. The corrective action was very simple indeed. The little black "lock" on the orange retractor reel connector, also pushes the shorting bar away from the pins inside of the reel ...
1999 GMC K1500 Suburban SLE 5.7L MIL Lamp on VIN: 1GKFK16R5X
Replaced Crank Sensor So Far Good! Thank You! Than Goodness My Customers Are Understanding, Trouble codes: 1351 (Ignition Coil Circuit High Voltage).
2007 GMC Acadia SLE 3.6L MIL Lamp on VIN: 1GKER137X7
Oak guys thanks for all your help, the customer is short on many and she is not going to fix the vehicle at this time, but the funny part is when they say is to much many i am going to sell it, thanks everyone Trouble codes: P0016 (Crankshaft Position CKP - Intake Camshaft Position CMP Correlation Bank 1).
2007 Honda Civic Si 2.0L water pump VIN: 2HGFA55517
I think the tools I used are as good as it's going to get. Not an easy job. I do appreciate the advise you gave, but still need to mention that the water pump pulley on this civic si is a part of the water pump and can not be removed separately. It does not ha...
2003 Jaguar XJ8 4.0L Poor Idle Quality, MIL Lamp on VIN: SAJDA14C93
Client needed vehicle, vehicle not repaired at this time. Found when intake system smoke tested on a cold engine that intake manifold seals to cylinder heads were leaking. Once engine warmed up would get very little smoke at intake seals. Believe this is the... Trouble codes: P0171 (Too lean bank 1), P0174 (Too lean bank 2).
2007 Jeep Wrangler Unlimited X 3.8L Check Engine Light VIN: 1J4GB39117
Ok, so what fixed this vehicle was a PCM. I still do not know why the PCM failed and set this code at the same time the engine was replaced other than coincidence. It was a very weird, and random problem but it's fixed now. Thanks for all of the input.
2004 Kia Sorento EX 3.5L oil pressure VIN: KNDJD73354
Well, this one is done. Thanks for the many that provided insight. Pulled pan and cleaned again of additional light carbon sediment (nothing big enough to clog pickup screen). Nothing stuck to pickup screen. Since I had a new pickup, I cut and extended the...
1996 Mercedes-Benz S320 SWB 3.2L automatic transmission VIN: WDBGA32E5T
I replaced the transmission control unit with the updated number per the bulletin that I mentioned to you on my update, The transmission now works like new. Thank you all for taking the time to suggest solutions to this problem.
2003 Mercedes-Benz E320 3.2L Battery Light VIN: WDBUF65J73
1999 Mercury Mountaineer 4.0L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 4M2ZU54E4X
thank everyone for their help with this vehicle. i was able to test drive vehicle myself yesterday. in 110 miles of driving back and forth to work, it sputtered and misfired for a total of 15 seconds at 55mph during the entire drive. i informed the customer th... Trouble codes: P0171 (Bank 1 lean), P0174 (Bank 2 lean).
2002 Saturn SL2 1.9L Engine VIN: 1G8ZK52732
Hello every one, got to the bottom of this mess finally. I did check all the sensors that could cause the problem all had good reference voltage and good signal return. found bad connection at the eic module ground an the engine ground at the back of the engin...
2000 Volvo S80 2.9 2.9L No Start, Misfire, MIL Lamp on VIN: YV1TS94D4Y
Once again bit by plugged catalytic converter. I have removed o2 sensors, my back pressure test was normal, so I did not come back to plugged exhaust. Finally decided to remove converters from manifold. Vehicle starts and runs and responses to throttle. Ve...
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