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[bash]

 [size=14][/size] Sorry to be a pain, but i am still not happy with the tick over of my 2002 Omega 2.2 litre Auto CD. From cold it starts first turn of the key idles at approx 1200 rpm and runs fine, but after less than 30 secs drops to 800 rpm and if i stop at a junction or stand in traffic you think its going to cut out. The revs never drop it just sounds like its lumpy, it will rev up no problems with no miss or hesitation. This is far worse at under 80 degrees on gauge when the car does reach operating temp it does idle much better, but again in my opinion not really smooth. Below is what i have done to try and cure the problem, again when driving the car it is smooth and drives excellent. Its just the tick over.

Things done to try and cure problem
No1- Cleaned Throttle body and all breather pipes out
No2- New plugs
No3-New Rocker gasket to stop oil in plug chambers
No4- New coil pack
No5- oil and filter change
No6- Compression test
No7- Had the car on the most up to date diagnostic machine and there are no faults been recorded in memory. No faults showing with the engine running in fact showing every thing OK. But even the technician said it sounded odd at idle but could give no ideas

Can the mixture be reset with the diagnostic machine and the revs set higher. It is drive by wire  does any one know or have any ideas cheers bash ( Tony

[Auto Addict]

When you removed the throttle body to clean it, did you fit a new gasket?

Did the butterfly operate smoothly?

Did you clean out the little plastic semi-opaque pipe from the throttle body?

Did you clean out the small hole in the throttle body by poking it through?

[omegadan2.2i]

Clean the EGR valve (exhaust gas regeneration valve) - there is a 'how to' on here for the 2.2i petrol.  It is situated at right had side rear of the block near the bulkhead.

I had this same problem on my 2.2i after I had the exhaust manifold gasket changed - been fine ever since! :  (Except I have a broken cat now but THAT's another story!)

Dan

[old cruiser]

Also try changing both the Fuel and Air filters.
Cheers Pete

[Auto Addict]

Also try changing the fuel filter
Cheers Pete

Good idea, should have thought of that

Might also be worth running some Forte Injection cleaning fluid through the system.

[bash]

[size=14][/size]Cheers every one,

 [size=14]Re- cleaning the throttle body ( YES ) i did it as stated in this Forum, everything was like new , and i did clean out the small hole,  and i did buy both gaskets one for the throttle body and one for the breather pipe to the block, plus a new small breather pipe.  I really cleaned the rocker cover inside also as i had it off to change the gasket.

Re- Fuel and Air filters both were changed as soon as i got the car, i know i sound like i am a clever so and so but i always put injection cleaner in the first full tank of any new  car i buy. When i buy a car for myself, I go for a test run,  a decent journey to find any faults out, On this car really only the idle was a problem. I then do a full service,  on this car the only thing that i didn't need to do was the timing belt as this and the water pump was changed less than 5000 miles ago. [/size]

Re- the EGR valve i have not cleaned this out, do i need any gaskets and do you have to take it apart. I do know it was cleaned out about a year ago as the previous owner is a close friend and when we were talking about the idle said he had his garage clean it out, he says it has always idled like it is now, he also said he tried all the things i have done apart from fitting a new coil pack. And it idled no better so he just put up with it.

I am wondering if the fuel mixture could be to weak, or something like this, when i take the plugs out they are more white than tan colour. can the mixture be altered on the 2.2 litre model. thanks for all your suggestions, this is the first Omega i have owned and the idle is the only thing that is letting the car down as it is very comfy, not bad for speed , handles OK and decent spec  bash
[size=14][/size]

[omegadan2.2i]

[size=14][/size]Cheers every one,

 [size=14]Re- cleaning the throttle body ( YES ) i did it as stated in this Forum, everything was like new , and i did clean out the small hole,  and i did buy both gaskets one for the throttle body and one for the breather pipe to the block, plus a new small breather pipe.  I really cleaned the rocker cover inside also as i had it off to change the gasket.

Re- Fuel and Air filters both were changed as soon as i got the car, i know i sound like i am a clever so and so but i always put injection cleaner in the first full tank of any new  car i buy. When i buy a car for myself, I go for a test run,  a decent journey to find any faults out, On this car really only the idle was a problem. I then do a full service,  on this car the only thing that i didn't need to do was the timing belt as this and the water pump was changed less than 5000 miles ago. [/size]

Re- the EGR valve i have not cleaned this out, do i need any gaskets and do you have to take it apart. I do know it was cleaned out about a year ago as the previous owner is a close friend and when we were talking about the idle said he had his garage clean it out, he says it has always idled like it is now, he also said he tried all the things i have done apart from fitting a new coil pack. And it idled no better so he just put up with it.

I am wondering if the fuel mixture could be to weak, or something like this, when i take the plugs out they are more white than tan colour. can the mixture be altered on the 2.2 litre model. thanks for all your suggestions, this is the first Omega i have owned and the idle is the only thing that is letting the car down as it is very comfy, not bad for speed , handles OK and decent spec  bash
[size=14][/size]

Gasket is quite a thickish metal one IIRC and would not normally need changing but when removed you could check that it is still okay.  The spring loaded 'plunger' needs cleaning with degreaser or my AA mate just used WD40, making sure that it is nice and free but with a 'firm' pressure to the spring.  If it feels a bit 'limp' could need replacing.

If you still have no luck it maybe worthwhile you contacting Marks_DTM who lives in Nottingham (3/4 hour from Donny) for him to have a luck at.  He has Tech2 and everyone says he is a top bloke!!  Send him a pm!

Dan

[cem_devecioglu]

Idle problems can be very complex and sometimes can be expensive to fix.

How about the throttle position sensor...In my case was effective..

Exhaust manifold gasket in case of leakage will disturb the idle also..

In my case also cleaning ICV was not adequate...I changed with new..

1 year is long time for EGR to stay clean..

I also tried carbon clean...The engine become smoother

But there are times that you really need to change some parts for idle if you are sensitive..And once you start it becomes a deep hole in the budget..  :-/

Unfortunately ECU mostly dont help stay and watch..

[Krax]

I have the same problem whid may 2.2. I“ll tray to clean my ERG. Wery good forum!!!!!!
Krax from Sweden

[estaszew]

Any updates?

[bash]

What a night mare, I found my exhaust manifold cracked when i took the stainless cover off. But the worse part both front studs snapped.  (Okay all you members who said cracked manifold in the first place ). After about 4 hrs we got the end top stud out but the very end one not a hope. Snapped 1/8 in the head at an angle ,tried making a jig to keep the drill central welded to the old manifold. Bought the best drills plus a 90% drill attachment could not touch it. In the end all new studs, nuts gaskets, plus brand new exhaust manifold £120 worth and what we did out of heavy duty bar made a clamp that bolted onto the tapped hole just under the manifold then the end of the bar posotioned where the stud should be and when tightened put's pressure on the manifold. Just like the old style manifold clamps, Touch wood no exhaust blow or tapping on start up plus the car idles a lot more smoothly. But i will say they are not the most refined engine still sounds a bit agricultural to Jags i have owned. But the mechanic at Perry's said they called the 4 pots tractors compared to the 6's. Will do the EGR still but another day had enougth today. Does any one know how the EGR valves  work on the 2.2 petrol does the pressure go through the head or the manifold to it. Cheers to every one for the advice, will have my fingers crossed tomorrow on start up Regards bash IE (Tony )