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Prev Professional Automotive Repair Technical Discussions for June 2, 2007
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Help Request Answers
1992 BMW 325i 2.5L Surge VIN: WBACB4314N
I have a strange surge when decelerating or coasting between 40 to 60 mph. The rpm fluctuates and it almost feels like the TQ Converter is locking and unlocking. Mostly noticed when pulling off the interstate and coasting to a stop. It will only surge above 40...
1994 BMW 740i 4.0L Transmission VIN: WBAGD4329R
Trans shifts hard in 4th gear and will sometimes go into trans program. The car shifts smoother when you have been through the shift cycle a few times but it is getting worse. The codes are 105 for the trans and this is only when it goes into limp. The engine ...
1999 Cadillac DeVille 4.6L Stall VIN: 166KD54Y5X
This car stalls that is intermittant. Have checked fuel pressure and grounds. Have replaced both crank sensors and iac and have cleaned throttle body. Checked for bad connections. Snap shot on tech II shows nothing. Fuel pump was replaced about 6 months ago. D... Trouble codes: 1599
1999 Cadillac Seville SLS 4.6L engine temp VIN: 1G6KS54YXX
this vehical will only overheat with a/c on, comp engages harsh but blows cold cannot force into overheat by just driving hard, both rad fans on w/ a/c but only seem to be on low speed temp will come back down if a/c switched off have block tested and passed, ...
1992 Chevrolet K3500 Cheyenne 7.4L Poor Idle Quality, Misfire VIN: 2GCHK39NXN
When I got the heads reinstalled and started vehicle. Everything checks out ok, except at idle there seems to be a misfire. Performed cylinder balance test and found #8 cylinder to not change the rpm. Checked compression 125 psi all others around 150 psi. Appl...
2000 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14W8X
Truck come from another shop. The other shop replaced all in "Related Repair History". Customer says problem happend other night, no start. We checked for spark w/ an inline tester were u can see if spark is present if the LED lite lites up, and yes spark is p...
2001 Chevrolet Impala LS 3.8L fuel gauge radio VIN: 2G1WH55K71
i have this impala here that the radio does not play at times and the customer also says fuel gauge not working and sometimes even the dash lights go out.i have seen the radio play and not play i also noticed that the fuel gauge will go to full and back down t...
2001 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W71
Vehicle will intermittently start, about 1 out of 50 tries. When it does start, will run fine for about 15-20 seconds then die. Once it dies, it's quite a while before it will start again, sometimes overnight. On occasion, it will start and restart, then die a... Trouble codes: P0101 (Mass air flow sensor performance)
2002 Chevrolet Venture LS 3.4L open monitors VIN: 1GNDX03E52
hello techs - we had this vehicle on our used car lot and the battery went dead (thanks to a customer leaving a door ajar) now someone would like to buy and it wont go through ny insp because of open monitos (evap / cat) - i have used both alldata and mitchell...
2003 Dodge Ram 2500 Truck 5.7L idle VIN: 1D7KU28D03
The engine has a slight shake at idle. The tensioner will make a clicking sound like an a/c compressor is comming on. The tensioner will jump when this happens ( 2 to 3 times in a minute). Have replaced tensioner with no change. All pulleys are spinning freely...
2003 Dodge Ram 1500 Truck 4.7L transmission VIN: 1D7HA18N13
I am not really familiar with Dodge pickups so hopefully someone can help. This truck will change engine RPM anywhere from 40mph to hyway speed. The RPM fluctuates 2-3 hundred RPM while steady driving and it does it in drive and overdrive. I have tried lugging...
1999 Ford Ranger XL 3.0L valve ping VIN: 1FTYR14VOX
This vehicle belongs to my part house salesman, the pressure is on. His Ranger has severe valve ping. It is a flex fuel but if he run any gas other than Shell midgrade or BP midgrade it will ping excessively. The dealer has reprogramed the PCM to try to cure t...
2000 Ford Explorer XLT 5.0L Driver air bag VIN: 1FMDU83P3Y
This one is driving me crazy, the worst thing it is my roommates, and he bought the car from our dealership so gettin my but kicked at work and home:). So, the under seat plug has been repaired and replaced once, not by us. The wires are white/light Blue and b...
2002 Ford F-150 XL 4.2L Stall VIN: 2FTRF07232
We received this vehicle on thursday. The customer on bring the vehicle to us -had the vehicle stall on him 10 times and then just turn the key and it starts immediately. We put the gensys on the vehicle and while doing so it quite twice on us before we even k... Trouble codes: P0125, P1000, P1112
2003 Ford Expedition XLT 5.4L Steering/suspension VIN: 1FMFU16L03
I'm a retired Ford tech (driveability) who's been away from the wrench end for several years now. Recently had to trade my excellent handling Explorer (V8-4WD)for the larger Expedition (V8-4WD)to accomodate towing a 26' toyhauler. Vehicle has relatively low mi...
2000 Honda Odyssey LX 3.5L 1-2 Shift intermitent harsh shift VIN: 2HKRL1862Y
customer originall came in and we scanned an found p0740 installed valves and customer left. came back with same problem but not as bad. It seems to shift hard from 1st to 2nd intermitently. I am the second person to look at this and I know on the accord's the...
2004 Hyundai Elantra GLS 2.0L Cuts out VIN: DM51DR4U13
The owner complains of stalling when negotiating low speed bends. Also, when waiting at lights, the idle speed will increase to around 2000 rpm and the car tries to drive off. We have had the car long enough to burn up a tankful of fuel and in that time the id...
1999 Jeep Grand Cherokee Limited 4.7L No Start, Stall VIN: 1J4GW68N5X
Vehicle was being driven to detailing shop and stalled out while stopped at a red light. Would not start back up right away. After sitting 15 minutes it started. WHile the car was there it was scanned for codes and none were found. Vehicle was picked up and ag...
1999 Jeep Grand Cherokee Limited 4.7L MIL Lamp on VIN: 1J4GW68NXX
hello jeep techs we have this jeep with a code 455 large evap leak. all the basics were checked, gas cap, purge solinoid and lines. when we induce smoke into the system it comes out of the lead detection pump filter. has anyone seen problems with the ldp or ar... Trouble codes: 455 (large evap leak)
2002 Mercedes-Benz C240 2.6L No Start, lack of power VIN: WDBRF61J92
Hello MB Techs This car has an intermittent lack of power and the Engine RPM' s goes up, while this is happening, also it is hard to start at times. There is no engine codes set. This problem has been occurring for the last 3 months, goes away and later return...
1997 Nissan Altima SE 2.4L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall
This car is driving us crazy. It came in with a complaint that it was surging and stalling. We performed an induction clean because the throttle was caked with build up. and an o2 sensor because the front one was reading too lean. Car seemed to drive great and...
2000 Nissan Quest GLE 3.3L MIL Lamp on VIN: 4N2XN11T1Y
This car was brought in by a new customer,in another shop front and rear 02 sensors were replaced (not original parts)codes po138 and po139 were on I replaced front and rear 02 sensors with original Nissan parts reset the system and 4 days later the Mil was on... Trouble codes: P0138, P0139
1977 Other European Silver Cloud .0L Hydralics
Customer "inherited" this fine piece of British craftmanship with no brake pedal. We are not familier with this system at all. It appears that someone has replaced the brake hard lines and hoses. The pads and calipers in the rear look "new". What the custome...
1998 Plymouth Grand Voyager Expresso 3.3L belt VIN: 1P4GP44G2W
This van keeps coming back. Very annoying. I know the usual pattern off chrysler vans that come in after a bad rainstorm with the belt off, but this van is worse than any other i've ever seen. I even called chrysler about it and they sent me a "repair kit" whi...
1995 Toyota Pickup 2.4L bearings VIN: JT4RN13D3S
hello,first time post for help. i enjoy reading all the responses. i have a howling front pinion bearing and leaking rear axle seal. i removed and inspected and found bad bearings for front diff and loose bearing at right rear axle. i know i need new bearings ...
2001 Volkswagen Beetle GL 1.8L Valves, lifters? VIN: WVWCD21CZ1
This car came to us after the cambelt broke at highway speed bending and or breaking most valves. The head was removed by the customer and taken to his machine shop for valve and lifter replacement. We got the car installed the cams and tensioner and refit the...
1994 Volvo 940 2.3L speedometer VIN: YV1JS8836R
The speedometer does not work and I need insight on how to remove the instrument cluster before we start breaking things! On either side of the surround bezel there is a hole and what seems to be a spring behind it... you can push the spring and not seem to re...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
1998 Audi A6 Quattro Avant 2.8L warning light VIN: WAUJC84A1W
Well, there are a number of thoughts as to what the indicator light represents. I received 9 replies which stated that this light indicates: rear fogs on, parking lights on, 4-way flashers, side lamps on, trailer lights on (not for USA models), any fog lights ...
1998 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y9W
many replies all saying theft system needs to be relearned.i cycled the ignition key to the on position for 10 minutes and off for ten seconds after the fifth time before i shut the key off i cranked the car for about 20 seconds and the car stared.very importa... Trouble codes: P1631 (theft system).
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GNDM19W3X
found out the cat.was bad even though it was new.sent customer to exhaust shop.I believe this was cause of spark knock.i'll have to wait to hear from customer if this helps idle problem.only code i'm getting is random misfire requests wre very helpful... Trouble codes: P0300, P0335.
1968 Chrysler Newport 383CID Hesitation, Ping noise VIN: CL23G8C282
Ok, here's the fix for all who are interested. To summarize: This car has no EGR, the heat riser is stuck open, engine temp is under control (barely). I removed the distributor, and noticed it has 'rmfg' or something like that on the outside. Disassembling...
1996 Dodge Intrepid 3.3L Cuts out, MIL Lamp on VIN: 1B3HD46T2T
I would like to thank Terry, Jeff, Sergio, Geno, Fernando for their replies. All suggestions were checked and rechecked. The final fix was to adjust the cam sensor closer to the trigger wheel, even though it was adjusted with the paper spacer that came with th... Trouble codes: P1391.
1997 Dodge Grand Caravan SE 3.3L MIL Lamp on VIN: 1B4GP44R9V
thanks for all of your suggestions. I have not had been able to finish diagnosing vehicle as my otc scanner does not read the ldp pressure switch. The info will be very helpful when i can use a scanner that has what i need in it. I checked all vacum hoses and ... Trouble codes: P1494.
1992 Ford F-150 Custom 5.0L MIL Lamp on VIN: 1FTEX15NIN
Thanks very much to the 6 techs who took their time to reply, especialy La Mont from Ohio, and Shannon from California.When I first started working on vehicle I saw that there was vacuum at EGR when runing KOER. After still getting code 33 insufficent EGR flow... Trouble codes: 33 (Insufficent EGR flow detected).
1992 Ford F-350 Custom 5.8L MIL Lamp on, engine races VIN: 2FTHF36H6N
I suppose the first rule we overlooked, was, we believed what the customer said, and, we believed that a new TSP had been installed. As most of you know, the TSP is rather inaccessible, so we didn't do as much testing on it as we should have, and instead put m... Trouble codes: 123 (tp above max voltage), 327 (evp circuit below min voltage), 328 (evp voltage below closed limit).
1996 Ford F-250 XL 7.3L o/d light VIN: 1FTHX26F5T
Thanks for all the information that has been given. Did find a 16 pin dlc right up the back of the dash. This truck was l/h/d converted to r/h/d. Also have been told truck has been under water. all fuse boxs signs salt water. have replace all fuses relay etc.M...
1998 Ford E-250 Econoline 4.2L 3-4 VIN: 1FTNS2420W
thanks to all who took there valuable time to reply.when i took the trany apart this time iwas very carefull for details i found that i missed the overdrive servo pin from touching the band since i could not air check the piston this time i made sure that the ...
2001 Ford Escape XLS 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FWYU04131
sorry for the delay but the owner of the vehicle took some time to decide what to do with it. the problem was that when vehicle sat over-night there was about 25% cylinder leakage in #1 cold. if the engine was started and ran for 1-2 minutes the leakage was on...
2001 Isuzu Trooper Limited 3.5L Cuts out, LOW POWER VIN: JACDJ58X91
Thanks guys, I checked the items that you mentioned, either they were not the problem or not acting up at this time. I did notice that someone else has been probing around in these areas as well, and was also not able to repair it. I will send my customer to t... Trouble codes: P1125 (etc limit performance), P1295 (power management mode), P1515 (tps correlation error).
1988 Nissan Sentra 1.6L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: JN1PB22S4J
thanks for the input , but the fix was what we thought -the air mass sensor - we had to buy an oem but it worked fine -joe
2003 Nissan Altima 2.5L No Start, MIL Lamp on
Well, This car is going back to the customer! We sent the car to our local Nissan dealer and they had the car for a week and claim that they cannot find the problem and are unable to fix it also. While it was there they claim to have replaced the cam and crank... Trouble codes: P0340 (Camshaft Sensor Problem).
1995 Pontiac Firebird Formula 5.7L Hesitation VIN: 2G2FV22P2S
this vehicle is fixed. it was the cat. conv. i checked back pressure the first time and i had 1/2 psi at idle and 1 1/2 psi at 3000 rpm, which i thought were ok. but i guess not for this vehicle. a few days later he said it got worse so checked back pressure a...
2000 Pontiac Grand Prix SE 3.8L Stall VIN: 1G2WR521YF
thanx to all who replied. very useful information, this site is the best tool i got from snap on. what the problem was a burned socket at the resistor plug. it had the revised unit on the firewall i followed the wire over near battery to the plug soonas i popp...
2000 Pontiac Sunfire SE 2.2L No Start, Cuts out, MIL Lamp on VIN: 1G2JB524XY
customer did not want to spend any more time and money on this vehicle . most replies to my help request led towards an ignition switch problem but we did not get a chance to verify.thank you all for your help Trouble codes: U1000 (no state of health from module), U1040 (loss of ebcm/ebtcm communication), P631, P632.
1987 Toyota Tercel STD 1.5L no power cold VIN: JT2EL31GXH
Hi All: The response on this one was the best I've received on a help request yet. Too many to thank but I must give special thanks to Peter [...]. The replies can be sumed up this way; run don't walk away from this carb, car...
2000 Volvo V70 2.4L No Start, Cuts out VIN: 1234567890
Now the engine light is back, on bulb check. Went back to basic and took the time to look at the wiring diagram for grounds and powers at ECM, test pins at ECM connectors and pin 70A had high resistance and 4.3v, I should have 12v, followed the circuit found a...
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