Originally Posted by
Provocateur
If you used a known good IACV and the problem persists, the problem has to exist in the wiring or ECU. Is it still throwing a code for IACV? Have you tried another known good ECU?
Try spraying around the manifold and vacuum connections with carb cleaner to find your possible vacuum leak. If you have a leak, it will suck it up and cause the engine to stumble.
TPS and IACV aren't related. The IACV is controlled completely by the ECU and maintains proper idle speed based on ECT.
Yes i tried a known good IACV and its not throwing a code since i replaced the o2 sensor.
Ill double check the vacuum hoses tomorro to see if i can find a leak.
If that doesnt do it on sunday ill try my friends ecu.
Its really confusing me, as it will idle fine occasionally...then start hunting again. Thers no pattern to when it does it if u get me?