1988 Honda Prelude 2.0 Si 4WS 4 Cyl 2.0L
The idle on my vehicle revs up and down repeatedly when it reaches operating temp. What could it be?
I believe it is the electronic Air Idle Conrol Valve but wnt to see if anyone has come across this problem and may know exactly what problem may be.
Quite possibly the IAC valve is faulty, may also be related to a simple engine vacuum leak or hose connection. Check these things first before replacing the IAC valve.