Originally posted by bobinyelm:
You said:
Does resetting the PCM do more than reading and erasing any existing codes? Is the computer adaptive in this vehicle?




Yes, it is adaptive.

The other thing you can do is to disconnect the sensors one by one and drive the car around to see how the symptoms change. I did that to diagnose a MAF/IAT/TPS/ECT problem, since those readings are somewhat redundant. Driving with any of those disconnected will most probably give you a MIL/CEL and of course the engine's operation will be affected, but it still can be helpful esp. with problems like yours.

Quote:


As far as a vacuum leak, wouldn't that affect the idle more than above idle running (because a leak is a greater proportion of intake air at idle than above idle)? I am asking because most false air leaks I have seen seem to screw up a smooth idle before they are noticed at greater throttle openings.




You're probably right. Sorry for not reading your post carefully enough.

T.