what is this sensor really called ?!
as said to your original question, aka secondary pickup coil.
but - like squirrels said, that part won't cause surging idle. surging idle is a 75% chance is the TPS (throttle position sensor) and 25% that its IAC (idle air control). each is about $40-50 at any parts store.
but - like squirrels said, that part won't cause surging idle. surging idle is a 75% chance is the TPS (throttle position sensor) and 25% that its IAC (idle air control). each is about $40-50 at any parts store.



