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Prev Professional Automotive Repair Technical Discussions for July 24, 2004
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Open Help Requests for All Makes and Models
Help Request Answers
1996 Cadillac DeVille 4.6L Poor Fuel Economy VIN: 1G6KD52Y0T
All 02 sensors, changed by someone else, due to a MIL, and code set. Since that time customer complaint of poor fuel mileage. Says mileage has gone from mid 20's to 16-18 mpg. Customer is going by the onboard display. Road test seems fine. Car goes like ganbus... Trouble codes: RF256
1984 Chevrolet Camaro Berlinetta 5.0L Poor Idle Quality VIN: 1G1AP87611
The problem is the idle quality is poor. It only has 8-10 in. vac. at idle-700 rpm. If reved up to 1500 it will raise to about 12. What do you think could cause the poor vac. The cam is for an HO but it isn't that big. The vac. is also steady. No major vacume ...
1997 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality VIN: 2G1WX12X4V
WHEN THIS CAR FIRST CAME IN IT HAD A IDLE OF 1356RPM,THROTTLE AT 7%/tps at .56v. replaced tps with 2 different ones from napa,no change,so i got a gm tps having same problem.i unplug sensor and it idles down around 800rpm.i jumpered connector see voltage chang... Trouble codes: 122 (tp sensor or app sensorb ckt short), 1122 (tp ckt intermittent high voltage)
2000 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC1243Y
This vehicle came in with the MIL on and the code P0141 stored. Followed alldata testing procedures and verified proper operation. All was well with O2 and its circuit. Test revealed PCM issue. tested all powers and grounds for PCM. Replaced PCM resolving issu... Trouble codes: P0141 (O2 Heater circuit)
1993 Ford F-150 XL 4.9L Convertor VIN: 1FTDF15Y5P
First of all I am not a transmissions tech so please bear with me. Customer last month had the trans flushed and convertor replaced at a trans shop because of shudder. He says they put an additive in it to smooth the shifts and it seemed fine for a few weeks. ...
1995 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34X6S
Vehicle Came in for MIL lamp on. Code said Bank 1 [...] not switching. Data on scanner back it up. Replace both 02 sensors and same result. Vehicle runs excellent. DATA Engine running at idle. TPS V. 1.03 ECT V. 0.60 ACT V. 2.12 IAC 37.0% MAF V. 0.80 DPFE... Trouble codes: 172 (Bank 1 Oxtgen Sensor Not Switching)
1993 Honda Accord LX 2.2L Main Relay VIN: 1HGCB7551P
Hi, Intermittant no start while cranking. I'm trying to find the infamous "main" relay on this accord. She always starts when I get to the car. Customer says she wont start when sitting in the heat. Its hard to test for something that isnt broke when I get the...
1992 Lexus SC400 4.0L temp controls
Thanks guys for any and all efforts on this one. vehicle came in low on freon. evaporator leaking. replaced evaporator, drier and exansion valve. Blows 40 to 45 derees for sometimes hours then all the sudden mist comes out the dash and temp climbs to 60 to 65....
1997 Mercury Mystique GS 2.5L Strange Noise VIN: IMELM66L2W
Hello fellows Tech's! Today as I was closing my shop a customer of mine came to drop off their car for me to check out a strange noise that they have been hearing for the last 2 days. Its a "whooooooooooooooooo" noise (I dont know if writing out the noise can...
1995 Mitsubishi Eclipse RS 2.0L No Start VIN: 4A3AK34Y2S
Hi guys I've got one here I'm at my witts end on. This vehical will not start,no spark. I've been through the book with this thing checking powers and grnds all ok. I got a new reman computor from the dealer, still no spark. When checking the auto shut down re...
1992 Pontiac Grand Prix SE 3.4L No Start, Stall VIN: 1G2WJ14X2N
I have the above Grand Prix in for stalling and failing to restart when hot. Once it stalls there is no cranking RPM indicated via scanner and there is no spark. I ran GM test A-3, Engine Cranks, Will Not Run and everything checks out fine. I have proper readi...
1996 Toyota Celica ST 1.8L Misfire, skip VIN: JT2DB02T0T
This car has a skip/miss,intermittently in the rpm range of approx.2200-3000. Under load or free running is the same. At WOT stall speed of 2000 rpm,it doesn't skip a beat,until approx.2200rpm or slightly more depending on temperature. Jerks quite noticeably w...
1998 Volkswagen Beetle 2.0L door locks VIN: 3VWBB61C5W
Hi Group, My tech replaced long part of both outer door handles & the lock asy inside door on right door. Before he did this the door locks worked fine. Now, you can lock & unlock the doors, open rear hatch with remote but both doors will not open with eithe...
2000 Volkswagen Beetle GLS 2.0L Imobilizer VIN: 3VWCC21C3Y
V.W. Techs, I am seeking advice from anyone experienced with bypassing the imobilizer system in this beetle. I have no schematics on this car and would greatly appreciate help from someone with experience on this system. Thank You in advance, dp
2001 Volkswagen Jetta GLS 2.8L MIL Lamp on VIN: 3VWTG69M91
morning guys , car came in with the above mentioned code stored on car , car runs fine but have not come across this code before, and No Data shows NO reference to this code . any help will be appreciated!! Alan Trouble codes: 17560 (B2 mix adapt. area 1 lower lean limit not reached)

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
1992 Acura Vigor GS 2.5L No Start, Stall VIN: JH4CC2652N
Sorry it took so long to let everyone know what it was. It was dist. cap full of oil! Bushings were fine but seal was as hard as a rock. Tried to get a seal thru honda and acura, worldpac wouldn't give me the time of day because we dont have an account with th...
2000 Audi A4 1.8L Poor Idle Quality
Hi techs, thanks for your help - customer picked up car with rough idle and I dont heard about him anymore.Sorry for taking it too long to close request.Thanks again
1990 Buick Century Custom 3.3L Poor Idle Quality, Stall, MIL Lamp on VIN: 1G4AH54NL6
Thanks to all 11 respondents; general consensus agreed with what I was thinking. A reman'd ECM from Auto Value did the trick. Disconnected battery,(connections were very clean), removed old ECM, switched proms, reinstalled new, hooked up batt., and it fired ri...
1995 Buick Park Avenue 3.8L battery, Alternator not chraging VIN: 1G4CW52K9S
First I would like to thank everyone who responded! I found that the pcm was the fault, I got another pcm from another buick and swapped them. Both of them were from the same year. The pink wire from the pcm was indeed a control for the alternator. The pcm pin...
1993 Chevrolet Cavalier RS 2.2L No Start, Stall VIN: 1G1JCI442P
Hello, I'm sorry but I don't have an actual 'fix' for this car. After posting I went to work the next morning and everything worked fine. I drove the car twenty miles and the boss drove fifty miles over 2 days. Returned vehicle to customer and they have had no...
1995 Chevrolet K2500 Cheyenne 6.5L clutch pedal VIN: 1GCGK24FE3
well, this one is finally fixed, customer stopped by to say it's been fine, thanks to all you guys that responded with help, I found that you do have to push the pedal slowly down when your bleeding these or it seems you make air bubbles, I also found if I jac...
2000 Chevrolet Prizm 1.8L Lighting VIN: 1Y1SK528XY
The headlamp switch provides a ground through the light module to control beam function. Our switch was dropping the ground on high beams, replaced the switch and cured the problem.
2001 Chevrolet Silverado 1500 5.3L No Start, Cuts out, Stall VIN: 1GCEC19T61
Hey all, I was headed in the right direction! It was a bad fuel pump module. I was told to check with a vantage the amp pattern, I did and it was good compared with another truck of the same year (my personal). I was also told to check for a pinched wire har...
1993 Dodge Caravan 3.3L Misfire VIN: 1B4GH44R8R
Thanks to all of the techs for their replies to my request for help. This problem is not fixed but it apears to be a possible broken flex plate causing the CKP and CMP to go out of phase, and did see a nick on CKP sensor but customer didnt want to pay to pull ...
1999 Dodge Grand Caravan 3.3L intermittent wipers VIN: 2B4GP24RXX
Thanks to all who replied, I did check various ground connections and the voltages at the Multi function switch, all was OK. Identifix help line recommmended BCM replacement, not quite ready to swallow that, I measured voltage at motor power wire, 12v. in Hi/L...
1999 Dodge Ram 1500 Truck 5.9L over head lighting VIN: 1B7HC1327X
gentlemen,thank you for your quick responses,and to all your helpful ideas,it turned out to be the iod fuse 12 that little cover through me off.i am learning that the fuses that have the cover mean alot on the chryslers.once again thank you for all your help.
1996 Ford Thunderbird LX 3.8L Hesitation, Cuts out, MIL Lamp on VIN: 1F4LP6244T
With help we found a bad massair sensor defective. Most all help pointed in that direction and after testing found meter vane dirty. Thank's for all the help. Trouble codes: P0430, P1131, P1151, P0171, P0174.
1996 Ford Thunderbird LX 4.6L interior lights VIN: 1FAFP33G21
thank you guys for your help it turned out to be the under hood lamp connector near the brake booster. The wires were shrunk and exposing the power and ground wire. they were intermittently touching.
1997 Ford F Super Duty 7.3L glow plugs VIN: 1FDLF47F7V
first off, I want to say thanks to all that responded to my post and second sorry it took so long to close this, it took a little bit to get a scan tool that would read the truck. we had an old one that couldn't. any way, for everyone that pointed me to the oi...
2001 Ford Focus LX 2.0L Hesitation, Surge, Cuts out VIN: 3FAFP3132Y
Well I'm not doing too good here. I checked grounds via voltage drops. All grounds were 0.02v . I checked the fuel pump control drive, AKA known good part. No fix. I unplugged various sensors, knock,MAF,O2 and it still acted up. I used my Fluke 98 to check the...
1995 GMC Pickup K3500 6.5L speedo
thanks again for all responses. the majority went for the drac(buffer), which turned out to be o.k. other good responses said to check for a loose reluctor in the transfer case, or scanner reading '4wd engaged' when in 2wd. thanks to tommy [...] for clearin...
1995 GMC g10 .0L chack ball locations for 1995 4L60e
I recieved a pic of the check ball locations..transmission is back together.will be installing today..Tahnks
2001 GMC Sierra 2500 HD SL 8.1L Valve body VIN: 1GTHK29G91
First, I want to thank all for the replies to this post. After checking the line pressures, dropped the pan, checked voltage drops on solenoids, and looking for any out-of-the-ordinary wear, debris, etc... I decided to change the fluid and send to dealer. (sti...
2001 Infiniti G20 2.0L MIL Lamp on VIN: JNKCP11AX1
Hello, First I would like to thank all who replied. Personal thanks a lot to Dave [...] (from Texas) for the help and inf... Trouble codes: P0105.
1989 Jaguar XJ6 3.6L Starter VIN: SAJKV1648J
The '89 Jag XJ6 now starts! Special thanks to Don [...]. Here's what I found; when I reinstalled the right hand blower box, I pinched the hot lead to the power relay for the factory installed a...
1996 Jaguar XJS 2+2 4.0L in car temp VIN: SAJNX2749T
The Jaguar is ice cold! After looking at the 2nd connector on the 3 15 pin connectors of the CCM module(bolted to side of evap case) and checking the wiring and pin voltage of the temp switch and coolant valve solenoid(located under the evap case) it mysteriou...
1998 Jeep Grand Cherokee Laredo 4.0L Hesitation, Misfire VIN: 1J4GZ48S6W
Thanks for all who helped..The fix was a bad o2 sensor..
1999 Jeep Grand Cherokee Limited 4.7L Mechanical VIN: 1J4GW68N4X
Hi Everyone, thanks to all of you who sent me information. I also want to apologize for posting this help request. It was pointed out to me that since I hadn't actually attempted to repair the car before posting, the technical discussion forum would have been ...
1963 Lincoln Continental 430CID Transmission
Thank you all who replied to this request. The problem on this trans turned out to be a broken metal seal ring on the input shaft. It some how got broken while I was repairing the rear pump gasket leak. Probibly from the weight of the unsupported output shaft ...
1993 Mercedes-Benz 300E 3.2L Poor Idle Quality, Surge VIN: WDBEA32E4P
Well after a week of working with it. I did find the main engine harness was the problem. The insulating was falling off. The key to finding the problem is unhooking the MAF connector and slitting open the harness and pull out the wires and when you do this yo...
1995 Pontiac Bonneville SE 3.8L Cuts out VIN: 1G2HX52K4S
It was my gut feeling that this was an intermitant electrical problem and as the parts replaced at another shop were still under wrty I advised the customer to return to the first shop. They replaced the FP with a GM pump, also the cam sensor etc still no fix....
1997 Pontiac Firebird 5.7L headlight motor
thank you so much too all who replied.well,after some more testing,i hooked the right side wiring up to the left side light,it still stayed on.replaced motor and all is well. thanks again,you guys are great.
1980 Porsche 928 4.5L low beams VIN: 9289101101
the fix was the high low relay thanks to all who helped
1995 Toyota T100 3.4L Poor Idle Quality, Stall, MIL Lamp on VIN: JT4VD22E9S
Vehicle seems to be fixed,as it fired right up & idles now;something it wouldn't do before. Got about 6 replies on this one & one of them was dead on. It had a tooth off the sensor ring on the crank sprocket. I had overlooked it when I had it apart the first t...
2001 Toyota Sequoia Limited 4.7L horn, power locks,power windows VIN: 5TOBT44A21
Scott from Illinois was right twice on this one, switch on lock cylinder at rear tailgate was shorted. Ecu for rear hatch provides voltage out to switch on 2 wires, 1 for lock, 1 for unlock at .3-.65v. Voltage is pulled to ground when switch is turned to eithe...
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