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Prev Professional Automotive Repair Technical Discussions for July 17, 2014
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Help Request Answers
2003 BMW 745Li 4.4L No Start, Poor Idle Quality, Hesitation, Surge, Stall, MIL Lamp on VIN: WBAGN63473
this car was towed in no throttle response when he parked it 30 days ago now it wont stay running. listed all these codes 2796 - 2799 - 27F6 - 27F7 - 27F8 - 278B - 278D - 271A - 2722 - 2783 - 5F26 - 5EE4 - 9C76 - 9C94 - 9C64 - 27E7 - 27FE - 27E8 - 27FF - 2821 ... Trouble codes: 2796 (throttle act - test low stop), 2799 (throttle - valve), 27F6, 27F7, 27F8, 278B
1980 Cadillac Eldorado Biarritz 6.0L No Start, Hesitation VIN: 6L579AE604
First of all I can not believe I am working on this relic... But you know the story, its a good customer, the car is extremely clean, low miles. It is a Regal Coach, from what I understand 1 of 5 ever built. Engine runs strong most of the time, plenty of power... Trouble codes: 34 (Unknown)
1999 Cadillac Eldorado ESC 4.6L Performance VIN: 1G6EL12Y6X
This has me baffled. low side pressure seems high to me at 50-60. Low side line will sweat, 50 degrees with temp gun, high side line feels warm. my thought is there is an internal refrigerant flow issue in the evap core. But how do I prove this with out diggin...
1994 Chevrolet Blazer 5.7L No Start VIN: 1GNEK18K4R
Hi iant members this is my case truck wont start unles i rotate distributor to advance posición once it starts i have to retard timing back again if i disconect spout connector engine shuts off se we replaced a good known ecm and distributor from another truck...
2003 Chevrolet Express 2500 5.3L No Start VIN: 1GCFG25T13
I have a real hair puller here. This van is a cranks/no start. Security telltale DOES NOT illuminate. No DTCs in ECM or BCM. Can communicate with all modules. Can command telltale on in IPC. Passlock cyl. voltage = 3.2 volts. ECM shows VTD fuel enable=No. All ... Trouble codes: U1000 (In SDM Class II data link malfunction)
2005 Chevrolet Trailblazer LS 4.2L No Start, start & dies @ times VIN: 1GNES16S85
Back w/ another problem (challenge). I've been working on this for a couple of days trying to figure why it don't start. This is what i have done: a. All fuses are good includig PCM I fuse. b. New fuel pump and pressure is at 60 psi koeo. c. Spark is good, che...
2006 Chevrolet Silverado 2500 HD LS 6.0L Steering VIN: 1GCEK19B66
I ran a check list of all the front end parts associated with this issue including the steering column / intermediate shaft. The left front toe was slightly out of adjustment but did not make a difference. Any help would be appreciated, thank you for your time...
2001 Dodge Ram 2500 5.9L Hesitation, Poor Fuel Economy, lack of power VIN: 3B7KC23711
Hello fellow techs, We have this Cummins powered Dodge that was brought to us in Feb. with complaints of extended start time and a drop in fuel mileage. It had a code PO230 relating to transfer pump failure, testing revealed it had a failed pump and we put in ...
2002 Dodge Ram 2500 5.9L Hesitation VIN: 3B7KF23662
Need some help on this one. I have intermittent power loss with this diesel. It is not consistent. I did have a fuel injection timing code ( will post with an update I'm not at the shop and can't remember the code) I checked the fuel volume from the supply pum...
2007 Dodge Sprinter 2500 3.0L Hesitation, Surge, Misfire, MIL Lamp on, bucking, white smoke VIN: WD0PE845X7
hi this sprinter it has like an on off switch as soon as i give it full load it starts bucking it has no power if i hold it long enough it will start smoking out white smoke. after it gets hot it has even less power it cant go past 2500rpm it constantly bucks.... Trouble codes: 2359 (charge pressure control boost pressure too low)
2005 Ford F-350 Super Duty XL 5.4L Poor Idle Quality, MIL Lamp on
After installing plugs and cop's started truck and was running rough suspected problem with new aftermarket cop's so reinstalled the oem coils knowing they were good problem still exist. During repair had battery disconnected and ECM removed not sure if this w... Trouble codes: P0351 (p0354-), P0354 (p0355-), P0355 (p0356-), P0356 (p0358-), P0358
2009 Ford F-250 Super Duty FX4 5.4L lifters chattering on start up of engine VIN: 1FTSW21509
engine came in with lifter chatter /rattle on start up installed new hydrolic adjusters new chain tensioners and freash oil and filters still has same noise . when engine runs 30 to 45 seconds noise gos away allow engine to sit for approx an hour dose the same...
2010 Ford Focus SE 2.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FAHP3FN4A
This car came in for normal maintence lof,front brakes,clean battery terminals,fuel system cleaning.All services where performed,car returned to customer.Customer returns car next day complains of ses lite on & codes koer & memory p0102 mass air fl... Trouble codes: P0171
2006 GMC Sierra 1500 SL 4.3L brakes VIN: 1GTEC14X76
Thanks for any suggestions you can give. I had this Sierra come in the shop today with a complaint of loss of brake fluid. It turns out the line going from the master cylinder to the ABS pump was rusted out & leaking under the truck. Obviously the pedal was no...
2003 Honda Odyssey EX 3.5L MIL Lamp on VIN: 5FNRL180X3
Hello and thanks for reading this. I have a 03 Odyssey that is showing false misfire codes. When the vehicle first came in it had 301,306,305,and 1399. Recorded and erased the codes and drove for 50 miles with no code returning. There were no misfires felt dur... Trouble codes: P1399, P0301
1996 Jaguar Vanden Plas 4.0L Poor Idle Quality, MIL Lamp on VIN: SAJKX6240T
This car originally came in as a no start. Found water damage from leaking windshield to engine computer. At the time it would not supply ground signal to injector power relay. I also could not communicate with the engine computer. Using an Autel I tried to co...
1998 Jaguar XK8 4.0L Steering VIN: SAJGX2247W
Customer wanted power steering pump installed due to leakage. He said after he noticed leak, he did not drive it. Installed his pump, now has no power assist steering is very hard to turn. Looks like fluid is clean, but no reservoir fluid is moving quickly
1998 Jeep Cherokee Classic 4.0L Misfire VIN: 1J4FJ68S8W
Good morning Got a very strange one here, misfies on #1 cyl only when trans is in reverse. Runs excellent in all forward gears. with no misfires at all. Thank you for any suggestions
2000 Jeep Grand Cherokee Laredo 4.0L Poor Idle Quality VIN: 1J4GW48S4Y
After replacing coil,and pigtail,and ecm,cam sensor i still get code po352 if i reset cam and crank it takes a about 10 start ups to start acting up again,checked compression in cylinder #2 i have 130 cranking compression,new plugs had been installed, and stil... Trouble codes: P0352
2004 Jeep Grand Cherokee Laredo 4.7L engine VIN: 1J4GW48N34
Need some direction fellow techs. Thank you for your time first and foremost. This Jeep came in for starter replacement, per customer request, riding on back of a flatbed. No inspection/testing wanted. Neighbor said it needed one I guess. No questions were...
2005 Kia Sorento EX 3.5L No Shift VIN: KNDJD73395
I was asked to look at this vehicle after the repairs were performed. Vehicle originally came in for the P0721. The customer does not do electrical but a visual inspection was performed along with a TSB check. Customer found that the TSB for a shielded output ...
2003 Lexus GX470 4.7L Steering VIN: JTJBT20X43
Driving down road at highway speeds the steering starts shaking about 60 t0 70 mph. You can speed up or slow down and it stops.The steering wheel shakes side to side. have checked front end alinement, balance tires several times, checked front end cannot find ...
1991 Mazda RX-7 1.3L Poor Idle Quality, Stall VIN: JM1FC3319M
Rotary guys. We have an RX7, which was running great, but now will not idle, ever. Runs and drives great off base throttle. We are out of ideas. see repair history for what has been done so far. When running it does smell rich, but it is an rx7 don't know if i...
2001 Mazda Miata 1.8L Stall VIN: JM1NB35331
New client/ new car to client, stalls and sets this code after while driving, P1345 Cam Position Sensor Not Detected By PCM, seems more often the hotter it is, can't duplicate stall on multiple test drives, any help would be great, I would like to track down t... Trouble codes: P1345 (Cam Position Sensor Not Detected By PCM)
2004 Mazda 3 S 2.3L 3-4 VIN: JM1BK12314
Car came in with no drive, took tranny down and gave it an overhaul.Transmission worked fine for one week.Then in fourth gear about 60mph rpm goes to 3k and tranny to limpin. Checked codes P0762(solenoid c)P0733 (3rd clutch).Took 3-4 clutch and they were burnt...
2007 Mazda CX-7 Touring 2.3L hesitates VIN: JM3ER293X7
help Mazda techs! This CX-7 ended up here after going to two dealers and another independent shop for the following concern- lack of power from a stop. This condition has been present before and after the client had the trans replaced years ago at 65k. we perf... Trouble codes: U0415 (Invalid data from abs contol module), C1235 (Rr wheel speed signal missing), C1236 (Lr wheel speed signal missing)
1989 Mercedes-Benz 560SEL 5.6L aux fan VIN: WDBCA39E7K
hello we have this 560sel and the aux fan is always on with key on (high speed) if i unplug climate control push button assembly it will shut off. we replaced push button assembly with rebuilt and problem stopped for a week or two. now sometimes it will come o...
2005 Nissan 350Z 35th Anniversary Edition 3.5L engine ping VIN: JN1AZ34D65
Hello. I have this 350z that has an intermittent engine ping just for a few seconds. Customer says he gets it when accelerating between 2nd and 3rd gear and sometimes in 4th. Not heavy throttle just accelerating around 2000 rpms. I drove it at all speeds and d...
2005 Nissan Maxima SL 3.5L Excessive Emissions, Hesitation, Cuts out VIN: 1N4BA41E75
I'm not familiar with testing khtz but my vantage says this should have 2.5 khtz at idle. I'm not sure what else to check. Also the wave form looks to wide compared to the one shown on the vantage. Trouble codes: P0726 (This code is only in the tcu)
2006 Nissan Altima S 2.5L Nats VIN: 1N4AL11D56
We lost the keys to this car and had the dealer cut us a new one. I have the code off the BCM (7c988) but need the PIN for the NATS code. Anybody know a way without the dealer? My dealer is not being friendly today
1992 Plymouth Voyager 3.0L No Start VIN: 2P4GH2534N
hey we did a water pump timing belt seals , and intake gasket and now I cant get it to start I have 45 psi fuel pressure, I have injector pulse and yes I took the cover back off to recheck my timing marks and they are on the marks for sure but cant get it to r...
2007 Subaru Outback 2.5i Basic 2.5L Misfire VIN: 4S4BP61CX7
So im not a big suburu guy by any means but hay what the hell.So this car came from another shop about 3 days ago running like SH!T.At idle this thing misfires on all cylinders.I found out the customer bought this car at an auction 2 weeks ago and has run crap... Trouble codes: P0301, P0303, P0304

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2008 Audi A6 3.2L MIL Lamp on VIN: WAUAH74F58
We ended up taking the intake off the engine and we found that the back of the valves were caked up real bad with carbon. We cleaned the back of the intake valves and replace # 2 injector and the car has been great! Trouble codes: P0302 (Cylinder 2 Misfires), P0266 (Fuel Injector 2 Contribution/ Balance Fault).
2004 BMW 325i 2.5L sec air injection VIN: WBAAZ33474
after repairing the vaccum part of system. test drove code came back drove vec home with scanner hooked am koeo cleared codes started and took off to work skiping warm up got to work code pending so started at front of system pulled fresh air filter and ...
2007 Chevrolet Suburban 1500 LT 5.3L Front Struts VIN: 3GNFC16087
This one is fixed. Turns out that I had two bad struts right out of the box from the dealership! Truck drives over bumps a whole lot smoother now.
2008 Chevrolet Equinox LTZ 3.4L MIL Lamp on VIN: 2CNDL33F28
Fixed! Just about everyone agreed that an OE EGR valve was the way to go, and that's exactly what fixed it. The OE valve never chattered, but I could swap the BWD valve back in and have it act up on demand. Yet another example of why NEW is meaningless any mor... Trouble codes: P0404 (Exhaust Gas Recirculation EGR Open Position Performance), C0561 (Invalid Serial Data Received English Theres a powertrain code stored in the PCM go fix it).
2010 Chevrolet Tahoe LS 5.3L Unknown VIN: 1GNUCAE03A
2003 Dodge Ram 1500 Laramie 5.7L Poor Idle Quality, Misfire VIN: 1D7HU18D43
I have done a Fuel Pressure test, 50 psi. Throttle Body Cleaning, removed from vehicle and cleaned. Fuel Injector cleaning. Disabled fuel pump, disconnected line at fuel rail and connected fuel injector cleaner. unplugged #1 coil and pulled ignition coil that...
1995 Ford Thunderbird LX 4.6L Hesitation, Misfire, MIL Lamp on VIN: 1FALP62W0S
Thank you to all that replied to my request. I think this vehicle is fixed. I have done everything possible to this vehicle. New everything. I thought I had it fixed multiple times but only to find it hesitating and misfiring when ever it felt like it. So afte... Trouble codes: P0402.
1998 Ford F-150 XL 4.2L Mechanical VIN: 1FTZF1820W
After I posted I tried to find a tech line to bendix. I never really came up with one. I did call wagners and was assured that the drums leave manufacturing with in specs. How their retailers store them they have no control over, and it seemed like they were v...
1999 Ford F-250 Lariat 5.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2FTPX28L0X
Thank you everyone for the suggestions. This morning I swapped o2 sensors with no change, checked for vacuum leaks, cleaned the maf, and scope tested the COPs in question. I found low kv and longer duration on cylinder 1. I swapped fuel injectors and the misfi... Trouble codes: P0301 (Misfire cylinder 1), P308, P0171 (Bank 1 lean), P0174 (Bank 2 lean).
2004 Ford F-250 Super Duty Lariat 5.4L Chassis VIN: 1FTNX20L84
First of all I'd like to thank all that responded. The general consensus was either too much caster or install a damper. Even though the caster specs are 2 to 6 degrees and we had just over 4 we reduced the caster to 2 degrees. The truck drives much better. I'...
2008 Ford E-150 4.6L Mechanical VIN: 1FTNE14W28
Hey guys I pulled the heads on the van num 8 Cly cracked into the water jacket one reman head and machined the other head runs great thank for the help
2003 Hyundai Santa Fe GLS 3.5L No Start VIN: KM8SC73T83
Wiring damage. A rodent had eaten through a couple of wires. Repaired the damage and engine started. I started testing the wiring to various sensors and found the cam sensor was not getting battery voltage on the required wire (Three wires: ground, signal a...
2003 Land Rover Discovery SE 4.6L MIL Lamp on VIN: SALTY16483
2004 Lincoln Town Car Executive 4.6L Misfire, MIL Lamp on VIN: 1L1FM81W14
Thanks to every one,being busy ,i was not able to work on the car. so latest progress is ... changed egr,valve and iac valve,car seems to run better,this time engine light stayed off for two long trips,before it was coming on very quickly. it did came on thou... Trouble codes: P0358, P0353, P0357.
2008 Pontiac Grand Prix 3.8L no 1st or 4th
Thanks for the help, first off guess glitch with scan tool it would pull codes but not data tried my new one communicated with no problem. When my guy pulled valve body 1st time while reinstalling pump put wrong bolt in pump and sheared teeth on reluctor whee...
2009 Pontiac Solstice 2.4L compressor VIN: 1G2MN35B49
Thanks to all that replied. Almost all of you suggested condenser or fan problems causing high pressure. Condenser seemed clean, and cooling fan ran at high speed. After closer inspection through the "small and very low to the ground grille opening",it appeare...
1997 Toyota Corolla 1.6L low flow VIN: 1NXBA02E0V
Thanks for all the replies we got. We checked every single one and the results were all negative, in other words, we could not find anyhing wrong. We reassemble the cooling system and heater back together. The only thing I did different was to replaced the the...
2000 Toyota Avalon XL 3.0L Hesitation, Surge, MIL Lamp on VIN: 4T1BF28BXY
250 more miles of testing with no surging, speedometer is working correctly, no engine light, no ABS light but I am still not confident that the problem is fixed especially since I experienced the symptoms after replacement of the transmission speed sensor. He... Trouble codes: P0500 (Speed sensor A fault detected), 33 (Right rear wheel speed sensor fault), 34 (Left rear wheel speed sensor fault), 62 (ABS ECU malfunction).
2003 Toyota Camry LE 3.0L Hesitation, Misfire, MIL Lamp on VIN: 4T1BF32K43
Thanks for all the replies. It has been a week since we repaired this car and all is good. Turns out the fix was the VVT solenoid. Upon removing the VVT's we noticed the VVT for bank 1 was binding when we would move it manually. Trouble codes: P0300 (Random Misfire).
2004 Volkswagen Touareg V6 3.2L No Start VIN: WVGZZZ7LZ4
Thank you to all who took time to reply. We eventually got this one sorted but with difficulty as it had two issues. One was the cam timing which was out. We didn't time the middle idler sprocket not thinking the two sprockets are of different sizes so it has ... Trouble codes: P0322 (CKP sensor no signal), P0341 (Camshaft position sensor A bank 1. Range performance problem), P0344 (Camshaft position sensor A bank 1. Circuit intermittent.).
2010 Volkswagen Jetta Comfortline 2.5L abs
the car is fixed. i found broken wire to the vacum sensor on the vacum pipe to the brake booster. the brown wire was torn inside. we fixed it and now car runs great. without any warning. many thanks to all the replies.
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