delguiner

Hey 92 prelude SR here...

when car starts up the idle jumps from 1,500-2,500 continously...

and even when the engine is warm it jumps from 1,000-1,800rpm

Im thinking its the fast idle... how about you guys?

I've heard this is a common prob for h23 4th gen preludes

vtecprelude

It could be, but also you might have a vacuum leak somewhere.
Meaning you are getting more air at idle than necessary causing the idle to go up and the computer is trying to bring the idle down.

delguiner

sorry but im a little bit of a newbie.... but how would i go about testing for that?