1994 Cadillac Seville V8 Front Wheel Drive Automatic 180000 miles
For a long time the car intermittently backfired through the intake when starting. I've passed smog twice here in California with flying colors. Finally I stumbled on a websight that clued me into a fuel pressure regulator located in the intake. I've been procrastinating doing it until the check engine light came on. I don't like driving with any check engine lights on, so I finally repaired it. It was a leaking FPR. The car starts and runs great, but the P085 code still plagues me. I've cleaned the throttle body valve and ID, cleaned the air filter (K&N), checked the TPS voltage, and reset the PCM code repeatedly, but it keeps coming on. Today I reset the PCM while driving (safely) and even though I did not let the enigne idle, doing about 45mph, the service engine soon light went out, then came right back on. The code was p085. How can it know the throttle valve angle is high at idle when the hasn't idled? I'm also inclined to take the beauty cover back off of the intake and reseal it, dumb idea?
Sorry to be so lengthy, A confused mantainer.
have the same problem?
Sunday, February 3rd, 2008 AT 12:34 AM