Automotive Technicians Technical Discussion and Fixes for Feb 22, 2013

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	Help Request	Answers
	2001 Audi A6 Quattro 4.2L No Start VIN: WAUZL54B81 Vehicle came in with cranks won,t start. Found no cel with koeo and no communication with pcm. Inspected multiple circuits and determined pcm was not grounding main relay or fuel pump relay. Causing no voltage at injector/coils/others. Following wiring diagram...	View
	2005 Audi S4 4.2L coolant VIN: WAUPL68EX5 This vehicle came in running with gauge barely off the cold mark. If you allow it to idle for 30 minutes the gauge will come up to 50% and the fan will cycle on and off continuosly. Drive the car and the gauge will sink down to nearly the cold mark. I put a th...	View
	2004 BMW 325xi 2.5L heater core VIN: WBAEP33424 There is no heat coming from climate system. I found a lot of scum lying inside the cooling system, like a frozen river along the bottom of the plastic heater pipes I replaced. Some thought it might be stopleak. The heater inlet pipe, which makes a right angle...	View
	2004 BMW X3 3.0i 3.0L MIL Lamp on VIN: WBXPA93474 po171 and p0174 set. smoke tested cold and no problems found. fuel pressure and volume good. pcv system replace 4 years ago as well as intake flap. replaced maf and codes comes back . no vacuum at dipstick tube. runs good and has no other problems. Trouble codes: P0171, P0174	View
	2005 BMW 645Ci 4.4L active steering VIN: WBAEK73475 Well I reached the point of asking for help. Customer brought vehicle to us for excessive oil consumption and smoke from tail pipe. We diagnosed to be the valve guides and seals worn and leaking. The car was under an aftermarket warranty so the customer battle...	View
	1995 Buick LeSabre Limited 3.8L Hvac VIN: 1G4HR52L4S Everything works but no airflow from vents,ac is not charged.changed parts from another car that works.what else controls system.has dual climate control.thanks for your help	View
	2007 Buick Lucerne CXL 3.8L No Start, Stall VIN: 1G4HD57217 Hello techs, I have an interesting one here. This Buick dies intermittently with no crank for a few minutes, then the starter solenoid will click when you try to start it. Then it will crank but no spark or injector pulse and eventually it will start and run f...	View
	1998 Chevrolet Tahoe LS 5.7L Egr, Evap, CAT monitors VIN: 1GNEC13R1W Need help to confirm EGR monitor enable criteria. Will confirm TPS again and disconnect brake light switch and drive on dyno tomorrow. Truck runs fine. No codes. Will not run the three monitors for some unknown reason.	View
	2004 Chevrolet Classic LS 2.2L No Start VIN: 1G1ND52F14 Greetings IATN members. This car occasionally will crank but not start. It's been towed here twice and both times it cranked and ran when it reached the shop. The last time it was towed I sent a tech out with the tow truck driver and he found that it cranked w... Trouble codes: B2960 (Security system cylinder data incorrect)	View
	2005 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GCDM19XX5 Cant figure this one out. Have .45 with minimal movement. Pinned the ECM at the Purple/white and had .64, so I decided to cut the purple/white out at ECM and at sensor harness and run a jumper wire and the voltage moved around but was low in the .1-.3V but whe... Trouble codes: P0140	View
	2005 Chevrolet Tahoe LS 5.3L code C0327 VIN: 1GNEK13TX5 Need some help with this on guys. This tahoe sets a code C0327 interm. May be fine for a few days and then service 4wd message wil show up and code C0327 set. We have serviced tons of these and I have only replaced 1 encoder motor, and a ton of switches on the...	View
	2002 Chrysler Sebring LX 2.7L Cam timing VIN: 1C3EL46R82 I just replaced the water pump on this gem and now it seems the rear bank is not firing now. Misfire codes for 1,3, and 5. Compression is 110-120 on that bank, and 175 across the front bank. You can tell when cranking that the compression is way off on some cy...	View
	2005 Dodge Stratus SXT 2.7L Poor Idle Quality, Misfire VIN: 1B3EL46TX5 The main problem this car is exhibiting is a flashing CEL. This problem ONLY occurs when on decel at a speed greater than 70 mph. Meaning that if I am going 75 and let off the accelerator, it will count misfires on cylinders 1, 3 and 5 until the speed dips und... Trouble codes: P0300 (Random Cylinder Misfire), P0303 (Cylinder 3 Misfire), P0304 (Cylinder 4 Misfire)	View
	2012 Dodge Charger R/T 5.7L ecm VIN: 2C3CDXCT5C Hi guys i have this dodge charger 2012 no start bought it with out the key fob i try to program the key fob with the witech scann tool but it say on the cluster no key fob when i hook up the witech and hit the start botton no lights on dash turen on os that no...	View
	2000 Ford F-250 Super Duty Lariat 7.3L fluid VIN: 1FTNW21F9Y Hello technicians. I have a simple question for the transmission experts. This truck is in great condition and has a lot of miles. He has owned it since 20000 miles and has never changed the transmission fluid. He is on the fence about doing is and I am. So I ...	View
	2000 Ford F-350 Super Duty Lariat 7.3L Engine mechanical VIN: 1FTWW33F7Y 7.3L powerstroke. I work on lots of Ford diesels and have an IDS and have checked the usual stuff. Truck came in with a loud knocking noise that goes away above 1000 RPM. The noise is so loud and heavy it feels like someone banging on the floor pan with a hamm...	View
	2000 Ford F-250 Super Duty Lariat 7.3L engine VIN: 1FTNX21F1Y This truck will run fine for a few days then it acts up and will barely run. Mil will only come on when it acts up. The only code that is there is p1316. If you wait awhile and try it the truck will run fine. It is very intermintent. I have checked grounds and...	View
	2003 Ford Taurus SE 3.0L Steering effort VIN: 1FAFP53283 Hi there everyone, I have this 03 taurus, pushrod 3.0L, it intermittently is hard to turn the steering wheel at idle speed, if I rev the engine a bit then it works fine, I unfortunately do not have a power steering pressure test kit so I am just looking for an...	View
	2006 Ford F-150 XLT 5.4L battery goes dead VIN: 1FTPX14VX6 Customer took to dealer, they said battery was defective and replaced, then told customer when he took it back that the remote start was the problem, I disconnected it, removed the 3 30 amp fuses. Problem even before the battery was replaced the truck goes dea...	View
	2006 Ford Mustang 4.0L front suspension VIN: 1ZVFT80N76 I have this mustang that can figure out a knocking, rattle noise from front end over bumps, potholes, or washboard roads. We replace both front lower control arm assembles from ford because the bushings were bad. we replace struts and strut mounts, lubed all p...	View
	2007 GMC Acadia SLT 3.6L interm no shift VIN: 1GKER33777 Need some help with this one guys. Vehicle came in with check engine light on. Customer said it jerked and then would not shift. Cut car off and restarted and it was fine for a week. Codes PO716 and PO717 set. Input speed sensor error. Replace sensor and clear...	View
	2004 Honda CR-V EX 2.4L failed caliper VIN: SHSRD78844 car came in left front caiper leaking replaced front calipers with rebuilt units bleed system brake pedal goes to the floor pressure bleed system same problem bleed A B S pump by cracking lines there is no bleeder on this unit still same problem let it sit ove...	View
	2007 Honda Odyssey Touring 3.5L Engine Car is a headache that just wont leave. 1 thing leads to another. Originally came in for t/belt water pump service. After 3 days the tension broke and as you guess, bent valves - 12 to be exact, broken timing covers, cam and crank sensors also damaged. Replace...	View
	2003 Mazda Protege5 2.0L Excessive Emissions, Poor Idle Quality, Surge, MIL Lamp on VIN: JM1BJ24523 Got a Mazda [...] here with an interesting problem. I get tons of lean codes, but hardly ever find rich codes in cars these days. This one has a p0172:system rich bank 1. Fuel trims are way negative: LT= -25%, short term fluctuates between -12% and -20%. Fu... Trouble codes: P0172	View
	1991 Mercedes-Benz 500SL 5.0L No Start VIN: WDBFA66E9M Hello, sorry for the long post, really just need some input. This vehicle came in running rough, idling high, then low and would intermittent die, intermittent severe lag on acceleration. This car has only one o2 sensor. EHA was leaking fuel. On smoke test, se...	View
	2002 Nissan Xterra SE 2.4L Hesitation, Cuts out VIN: 5N1DD28T42 Hello Nissan tech's, this one will bog down on acceleration bad. We found that when this happens the timing retards quite a bit. It will advance to about 40 degrees and run fine until you give more throttle and drops to as low as -9 degrees . Let up and will j...	View
	2007 Nissan Murano SL 3.5L blower motor VIN: JN8AZ08W87 heater fan dose not blow untill 15-20 min. of driving after sitting over night can see dig. display showing fan speed increase but fan dose not blow	View
	1999 Pontiac Montana 3.4L Driver Information Center VIN: 1GMDU03E6X have changed the driver information by a used one that displays compass and fuel economy by a used one. The new one is power on, displays some thing by don't show any information. It seems to need a reflash or programation or something... Mitchel and identifix...	View
	2003 Porsche 911 Carrera 3.6L engine VIN: WP0AA29983 Greeting fellow technicians. Customer came in shorty after an oil change about 4 months ago with a check engine light almost directly after an oil change. We had put in 5w40 sythetic, and realized it should have been 0w40. So first thing we did was changed the...	View
	2003 Saturn Ion-1 2.2L abs VIN: 1G8AG52F83 This saturn is becoming a nightmare ! The car came in for a service message that said service vehicle power steering. also had an intermitant no start. The 2 big fuses were blown and we replaced the steering motor. well long story short we found several differ...	View
	1993 Volkswagen EuroVan MV 2.5L Excessive Emissions VIN: WV2MD0702P Vehicle came in as a gross polluter from smog test. Co 6.26% Hc 103ppm @ 15 mph 5.21% 104ppm @ 25mph NOX 63 and 52 ppm. Scanned with Vag-Com and found no codes. Found a small vacuum leak @ hose to the ECU and F/P reg. Repaired and rechecked co 4.35 hc 89 @ 15 ...	View
	2004 Volkswagen Beetle GL 2.0L thermostat VIN: 3VWBK21C94 vehicle was in 1k prior and had an overheating issue. heater core was warm (both hoses), but lower radiator hose would stay cold. Replaced t-stat, no help, found water pump intact. Replaced radiator, which seemed restricted and was leaking anyways, and car see...	View
	2005 Volkswagen Beetle GLS 1.8L MIL Lamp on VIN: 3VWCD31C45 My question involves proper testing of front L/S signals from ecu. At the 6 wire [...] harness connector, unplugged, my information says: Pin 4, blu/red= 12v bat..Pin 3, white= off/on ground (engine running).. Between Pin 1, green, and Pin 5, black=.4-.5v k... Trouble codes: 16516 (B1 S1 Signal hi), 16414 (B1 S1 Heater circuit open)	View
	2005 Volkswagen Jetta GLS 2.0L no dash lights VIN: 3VWSA69M65 car came in with no dash lights, we replaced the rheostate but no change any ideas, thanks for any help william	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	1999 Acura CL Premium 3.0L No Start VIN: 19UYA225XX After trying two main relays, known good computer and imobilizer with keys from running vehicle, multiplex unit and disabling the aftermarket alarm system we still had a vehicle that would not start and still had no communication with PCM. Tech started disconn...	14
	2007 Audi A8 Quattro 4.2L Misfire VIN: WAULV44EG7 Thanks for all the responses and many thanks to Dang down in Texas for calling me after his response. We ended up taking the intake off the engine and we were shocked at 45 K miles the collection of gunk and carbon on the back of the intake valves. We replaced... Trouble codes: P0300 (Random / Multiple Cylinder misfires detected), P0307 (Cylinder 7 Misfire detected).	23
	2009 Audi Q7 3.6L Hesitation, Misfire, MIL Lamp on VIN: WA1AY74L89 oky guys this one is fixed!!! first of all i wanna thank Jay,Tom,and Jesus!! for responding to my cry for help!first of all to test fuel psi we had to order specail fuel adapters vag 1318/10 from ast that consist of 3 brass fitting once we go them then test de... Trouble codes: P2294.	3
	1997 Buick Riviera 3.8L Stall VIN: 1G4GD2216V WELL AT THIS TIME THE CUSTOMER HAS DECIDED TO TAKE THE CAR, IT HAPPENS TO RANDOMLY TO DIAGNOSE, WE HAD THE CAR FOR SIX DAYS AND FOUND NO BROBLEMS, WE NEVER EVEN EXPERIENCED THE ISSUE, AFTER 342 MILES. I AM NOT ONE TO JUST START REPLACING PARTS SINSE WE DO NOT ...	29
	2006 Cadillac DTS 4.6L MIL Lamp on VIN: 1G6KD57Y46 Thank you for all the input. To clear up a few things, the replacement cat was a Walker Ultra Ex converter. This is a federal emissions car, NOT a California emissions car. I've been told and found myself that California cars do not tolerate aftermarket cats. ... Trouble codes: P0420 (Catalyst Efficiency Below Threshold Bank 1).	16
	1992 Ford F-250 Custom 5.8L power steering VIN: 2FTHF25H2N Well we can call it fixed.The combination of a good rebuilt part always helps. The third p/s pump(atsco) seems to have fixed it. I will never use any cardone parts again, which is why napa is dropping them. When i installed this pump i hooked lines up first, f...	20
	2002 Hyundai Elantra GT 2.0L MIL Lamp on, Bump downshift VIN: KMHDN55DX2 The throttle position sensor was replaced with a new unit from Hyundai. Customer was given the car back. About a week later he called to say it was acting weird again. He was told to bring it back in but he has yet to do so. I have to close this post out. I wi... Trouble codes: P0121 (TPS range/performance).	7
	2004 Kia Spectra EX 2.0L Bucking, Jerking VIN: KNAFE12164 Thanks to all that responded. The Customer took the vehicle to the Kia dealer to get a part I thought would fix the problem, nearest 1 60miles away, while there had them diagnose, they said the trans module needed adjusting only charge for diagnoses. Maybe i...	4
	2002 Land Rover Freelander S 2.5L Ignition Lock Cylinder VIN: SALNM22212 Thank you for the great replies. Andrew was the locksmith that I chose to send the lock to, to be repaired. I sent it to him, in Virginia Beach, VA, he repaired it and shipped it right back. I reinstalled the lock and now it works like a charm.	4
	2006 Land Rover Range Rover HSE 4.4L Ride control VIN: SALMF15416 Hi a rep from Land Rover called me and said that unless I wanted to go into severe debt, that it would be best to send it to a dealer. So that is what will have to happen. Thanks	2
	2003 Mercedes-Benz ML350 3.7L No Start VIN: 4JGAB57E43 Finally ML is repaired Found that the AAM sends the power to the Transponder around the ignition switch, we were not getting power to the transponder Sourced out a USED AAM just for testing When we removed the AAM, it was LOADED with rodent urine, we also foun...	5
	2003 Nissan Murano SE 3.5L electric windows VIN: JN8AZ08W93 I added dielectric to the lock actuator plug. I still had problem. I inspected harness did not see anything wrong with it. I then gave customer an estimate to fix vehicle high enough to keep me digging. Hard to do when you dont know the problem. Customer decli...	11
	2005 Nissan Maxima SL 3.5L Brake Lights VIN: 1N4BA41E65 First i want to thank Tam, Mikol, David, Mark and Mike for their replies. Mark hit it on the head. A dime had fallen down in front of the radio and found its way into the unified/meter control unit. The dime was setting on top of the circuit board and short...	10
	2002 Oldsmobile Bravada 4.2L lower vent VIN: 1GHDT13S72 Thanks to those who replied. Its greatly appreciated. The problem with the vehicle was at fault of GM... Yep, gave them the exact part I needed and they delieved the wrong actuator 3 times. It wasn't until I compared part numbers to Napa that i found the issue...	3
	2002 Saab 9-3 SE 2.0L piston bearing VIN: YS3DF75K02 i want to thank everyone for the help, the pickup was clogged so we did an engine swap for the customer. and we did not have any problems with the radio locking up thanks again.	18
	2003 Saturn Vue 3.0L left wander VIN: 5GZCZ63B23 After setting steering angle sensor the vehicle stilled drifted left. I took vehicle down the road, centered steering wheel and then shut off vehicle. Vehicle still drifted left. With nothing else to lose, we dismounted the tires and flipped them inside out. T...	6
	2005 Subaru Legacy GT 2.5L Excessive Emissions, No power VIN: 4S3BL68625 Thank you to all that responded. I had gone over the information diligently with the customer. He is going to get rid of the car with out spending any more on repairs. He is very thankful to us and all the information and time we spent helping him make the ... Trouble codes: P0011 (A cam position over advance or system performance b1).	5
	1997 Toyota Avalon XL 3.0L engine VIN: 4T1BF12B3V first of all, thanks for all the replies. this is what happened we checked timing marks all lined up,checked fuel pressure,vacume leaks,m.a f. sensor,map sensor etc.etc. every time we cleared the codes, crank sensor po340 kept comming back ohmed out and it che...	16
	2008 Toyota KDH 201 3.0L MIL Lamp on ECU reflash is avilable at agents but owner installed DPF delete pipe Problem is fixed.Engine has great power now.Thanks. Trouble codes: P2002 (DPF below efficiency thresholdPlugged dpf filter).	3

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