Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Davey on 30 January 2008, 19:29:09

Title: Sudden rough idle.
Post by: Davey on 30 January 2008, 19:29:09

I've got a 2.2 Omega and its been good as gold until I came off the motorway today stop at a round-a-bout and when the revs dropped it was running rough as hell.. Revs fluctating between 300 and 1500 rpm, but as soon as I touch the throttle its fine..

I've removed the coil pack and theres no oil. The manifold sounds a little rough, cant see any cracks but I can see that a new manifold as recently been fitted and the front studs have been replaced with bigger than standard items. Could a blown exhaust gasket be causing this?

Cheers  :y

Title: Re: Sudden rough idle.
Post by: Dazzler on 30 January 2008, 19:31:39

Probably either an air leak or the ICV. Check both.

Title: Re: Sudden rough idle.
Post by: Dazzler on 30 January 2008, 19:32:13

ICV is idle control valve just in case you didn't know :-/

Title: Re: Sudden rough idle.
Post by: Davey on 30 January 2008, 19:35:20

Do the later engines have an ISCV.. I thought the drive-by-wire system took care of it?  gonna go look with a bottle of throttle body cleaner :D

Title: Re: Sudden rough idle.
Post by: cem_devecioglu on 30 January 2008, 19:51:29

If you dont get any EML,

clean your EGR and ICV using carb cleaner..

Title: Re: Sudden rough idle.
Post by: Davey on 30 January 2008, 20:13:48

The small breather pipe that goes to the ISCV was FULL of crud and so was the ISCV.. cleaned them out and its running much much better!

I didnt even realise the Y22XE had an ISCV  :o

Cheers guys! :y

Title: Re: Sudden rough idle.
Post by: Dazzler on 30 January 2008, 20:23:10

Quote

The small breather pipe that goes to the ISCV was FULL of crud and so was the ISCV.. cleaned them out and its running much much better!

I didnt even realise the Y22XE had an ISCV  :o

Cheers guys! :y

;)