Quote Originally Posted by mahdsports
if your idle is surging between idle and 3500 rpm, try looking at the fast idle valve. its located under the throttle body. they do go bad and when they do, it causes the idle to surge. i believe honda did remove them from the later b-series.
That would affect it all the time. He said when it's cold it's fine.

Possibly cam shaft sensor...doesnt hurt to try. If the car was in my possession it'd be a lot easier.

-Ant.