[email protected] wrote: > I know others have had this problem. I just can't remember what the fix was. > The car barely idles and barely revs up. If I disconnect the plug to the > dpr, it runs smooth, but not with 100% power. I suspect the temperature > sensor. Thoughts?
Say what? Mr. Motronic stumped on an FI problem? You're slippin', Alex.;-) Seriously, I read Renard's reply about the O2 sensor being the problem, and I find that odd. My O2 sensor died a slow death recently, but the only noticeable symptom was foul gas mileage. Have you checked for stored fault codes, and/or noticed the check engine light come on sporadically? My CE light had been coming on occasionally for quite a while, and I kept getting 2342 codes (O2 sensor system - faulty signal or exceeding adjustment range) stored. I replaced the sensor, the gas mileage improved, and the ECU has been clean ever since. BTW, I used a Bosch O2 sensor for a late '80's/early '90's Mustang GT, which was like $47 bucks. The sensor itself has the exact same Bosch part number stamped on it as the original VW factory sensor. Also, there are 3 different Bosch sensors listed for the Mustang. The only difference is the length of the wires - something like 9", 12", or 16". I used the longest one, cut the Ford connector off, and spliced it to the factory harness. If I ever do it again, I'm going to go to the Ford dealer and get the mating connector housing and pins that are on the Mustang O2 harness. The connectors that Ford uses are very nice environmentally sealed (couple of O-rings and a twist lock type housing). If the O2 sensor isn't the problem, I'd check the air flow sensor potentiometer. You check the supply to output voltage differential at the air flow sensor connector on the side of the fuel distributor. If it's out of spec, there's a trim screw on the pot, which may allow you to tweak it back into spec. If that doesn't bring it into spec, you're looking at replacing the whole air flow sensor assembly ($$$). See section 5, page 67 of the Bentley... --Holland [email protected] San Jose, CA
