IAC?????

[uncltrvlnmatt]

I know a sticky IAC will cause a hanging idle. But will it also cause a a miss when the engine is cold. The miss only happens after the car has been sitting for long periods, more than a week. After it warms up the car runs great.

 

[greenscobie86]

Mine does this too in a way...

I actually just cleaned my IAC this weekend(it wasn't too dirty) and that seems to have helped.

It also sometimes does it if I beat on the car really hard for a long period of time. then it will misfire for like 30 seconds.

I'm starting to think the plugs are original in my car so I can only guess weather or not the IAC cleaning worked or not until I pull the plugs.

 

[uncltrvlnmatt]

I guess I will have to pull it apart and clean it.

 

[MustangMoser]

are you sure its a miss? the only thing the IAC is doing is letting air past the throttle body. it would have nothing to do w/ a miss fire. with it only happening after its set it may be an injector leaking down, washing out the cylinder. it would clear up after a little while of running.

 

[TxCobrA98]

i dont believe you are supposed to clean your IAC valves... just something ive heard.

anyways.. ive cleaned mine like 10 times, hopefully it helps! lol

 

[greenscobie86]

Good point on the injector leak MustangMoser... Could very well be.

 

[uncltrvlnmatt]

I will try and clean my IAC this weekend. If that does not fix the miss after sitting, I will get the injectors pop tested.

 

[Shifty Powers]

Why not just replace it? I had to shortly after i got my cobra....

Was at the 1320 on the coldest night of the year and it kept bogging down while idling.. next thing i know it just died.. Would turn over but not start. Took forever to figure out it was the IAC Valve but it was such a relief when we figured it out..