srudiger

Ok sorry if some of this is messed up posting from my phone but I just got my car back from a complete rebuild when I got it back it was throwing a code for 02 sensor so today I replaced it reset the ecu let the car re learn the idle went for a drive and now I'm throwing codes p0325 knock sensor and p0505 idle air control so before the rebuild I had the 02 sensor CEL and weird idle before getting rebuilt I replaced the iacv with brand new cleaned tb and new gasket adjusted idle screw can't find any air leaks don't know what else it could be only thing I can think of is when the motor before being rebuilt was burning a lot of oil it gummed up my exhaust could this be a possiblety? Any help or sugesttions will be greatly appreciated

srudiger

Begging to think my exhaust is clogged from head gasket previously going and burning a lot of oil is this plausible if do how would I check this again any help would be greatly appreicated

White Devil

Why havent you taken your car back to the place that did the rebuild? It would make more sense for them to diagnose it than we could.

Fabrik8

You've removed and reinstalled the harnesses and the sensors, so it could be something very simple that has been damaged in the process.

srudiger

The owner of shop is coming bye today to do some testing

WALL-E

Check your FITV, if you got a new iacv, and cleaned the TB; that is most likely the issue.


Its a "fast idle thermo valve"

Just have to open it up, and screw white piece back down, it backs out causing high/erratic idle.

srudiger

2000 si does not have fitv its all part of the iac