Aussieveedubbers · Non-VW Engine Conversions

Idle air control valve dramas

https://forums.aussieveedubbers.com/threads/89624/idle-air-control-valve-dramas

pete wood ·

Hi all, bin a while since I've been on here. EJ25 DOHC OBD1 motor.

Having a few dramas with my IACV. It is working, but the engine is idling very rough and the check engine light is on. It also told me I have a drama with the MAF sensor, but cleaned that out the other night so I don't think that's it.

I've blown the valve out with carb cleaner and pulled the stepper control off the top, but it all looked good inside. It's moving well enough, but something isn't right.

Anything else I should check?

ian.mezz ·

LOOSE rubber intake pipe from air cleaner to throttle body.???

pete wood ·

Thanx Ian,

funny thing actually. I just took it for a quick run and there were no dramas and no check engine light. funny old thing...

ahoogah ·

pete wood wrote:Hi all, bin a while since I've been on here. EJ25 DOHC OBD1 motor.

Having a few dramas with my IACV. It is working, but the engine is idling very rough and the check engine light is on. It also told me I have a drama with the MAF sensor, but cleaned that out the other night so I don't think that's it.

I've blown the valve out with carb cleaner and pulled the stepper control off the top, but it all looked good inside. It's moving well enough, but something isn't right.

Anything else I should check?
My ej22 IACV was disfunctional when cold but once warm was ok. I had it apart and noticed "very slight" sticking in the bearing,flushed and oiled and all was well.
Dave.

surfbeetle ·

Here's the link over to the IAC thread on NASIOC, definitely worth reading.

http://forums.nasioc.com/forums/showthread.php?t=781242&highlight=iac

pete wood ·

thanx, but my iac looks nothing like that. completely different setup.

ElusiveStranger ·

I don't like cross linking but RJES did a very nice explanation here (but I do link to here too 🙂 ):
http://www.vwkd.co.uk/bb/viewtopic.php?t=1915&highlight=iac

HTH Pete.

Balders