okay, i need your help again. this time the idle is surging non-stop. when im in N idling the idle surges like im revving the envine over and over again up to a little below 2K. we replaced a IACV, replaced the gasket between the throttle body and intake manifold.

the problem has only been resolved because we close the idle valve all the way shut. if we open it even a little the idle will surge again. currently the engine idles at 850-950, normal idle values. but it's awkward because when we turn the air conditioner on, the idle does not jump like its supposed to.

either way: idle valve is completely closed with no surge. engine idles normal now. if idle valve opens a bit, surge goes crazy. air conditioner does not affect idle like it normally would.

should i worry? what's the real problem causing the idle surge.

no CELs.