Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: GrayUK on 19 July 2018, 13:10:37

Title: Tick over lumpy, EGR valve?
Post by: GrayUK on 19 July 2018, 13:10:37

All, hi again.
I have a 2001, Omega 2.2 Petrol.
Tick over is rough, like its missing but not quite, if you know what I mean.
I have done all the normal things, removed all the intake side, cleaned and replaced, along with a new airfilter.
This did not stop it so I replace the plugs… still no satisfaction.
When cold, there is a lot of noise from the manifold, like it is blowing, but this soon goes and is replaced by the uneven running.
On the road it is fine, it is just tick over (600 rpm).
It has been suggested that the EGR valve could be stuck open, (the car has done 206,000) and i am not aware of any changes of this valve.
Is there any advice you can give?
I not, any info or advice for replacing or blocking the EGR valve?
Where exactly is it?
Thanks in advance for your help.

Title: Re: Tick over lumpy, EGR valve?
Post by: terry paget on 19 July 2018, 13:31:09

The EGR valve is at the rear of the head, see my recent thread page 7 for pictures.
http://www.omegaowners.com/forum/index.php?topic=142255.90

Title: Re: Tick over lumpy, EGR valve?
Post by: GrayUK on 19 July 2018, 13:44:45

Thanks
Unfortunately  i can not see the pictures here, i will check later at home.
Thanks for your post.

Title: Re: Tick over lumpy, EGR valve?
Post by: terry paget on 19 July 2018, 22:22:09

Not quite sure why you suspect the EGR valve. On your high mileage car I would first have looked at the throttle. On a fly-by-wire car like the 2.2 you have no idle control valve, as on the 2.0 car, the throttle opening is controlled electronically by the ECU. If the throttle has carbon deposits or gummy residue on it, it may not function well at small openings. If my 2.2 had an idling problem, I would remove the throttle, inspect it, clean it and polish it. If that failed, I would next look at the breather system.

Title: Re: Tick over lumpy, EGR valve?
Post by: GrayUK on 20 July 2018, 07:22:58

 :(

Title: Re: Tick over lumpy, EGR valve?
Post by: GrayUK on 20 July 2018, 07:23:48

 :(

Title: Re: Tick over lumpy, EGR valve?
Post by: GrayUK on 20 July 2018, 07:25:01

Quote from: terry paget on 19 July 2018, 22:22:09

Not quite sure why you suspect the EGR valve. On your high mileage car I would first have looked at the throttle. On a fly-by-wire car like the 2.2 you have no idle control valve, as on the 2.0 car, the throttle opening is controlled electronically by the ECU. If the throttle has carbon deposits or gummy residue on it, it may not function well at small openings. If my 2.2 had an idling problem, I would remove the throttle, inspect it, clean it and polish it. If that failed, I would next look at the breather system.

All of that has been done, cleaned out, new airfilter, piping checked.
New plugs, runs like a dog at tick over..

Title: Re: Tick over lumpy, EGR valve?
Post by: omegod on 20 July 2018, 07:35:58

Any lights on the dash? Stored fault codes?

I'd be suspecting cam sensor or coil pack

Title: Re: Tick over lumpy, EGR valve?
Post by: BazaJT on 20 July 2018, 07:45:37

If there's a lot of noise from the manifold when cold which quietens when warmer it would suggest[to me at least] that the manifold is cracked/not tight or the gasket has blown.Expansion from heat then closes any gap.Could this have an effect on its ability to tick over smoothly?

Title: Re: Tick over lumpy, EGR valve?
Post by: GrayUK on 20 July 2018, 08:00:30

Quote from: omegod on 20 July 2018, 07:35:58

Any lights on the dash? Stored fault codes?

I'd be suspecting cam sensor or coil pack

This mornings codes!
P1328
P1327
P1555

Title: Re: Tick over lumpy, EGR valve?
Post by: GrayUK on 20 July 2018, 08:01:40

Quote from: BazaJT on 20 July 2018, 07:45:37

If there's a lot of noise from the manifold when cold which quietens when warmer it would suggest[to me at least] that the manifold is cracked/not tight or the gasket has blown.Expansion from heat then closes any gap.Could this have an effect on its ability to tick over smoothly?

Yes, agreed, but i am not leaning in that direction.