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[VikkiH1978]

Hello, can anybody help? bought an r-reg omega ran fine 4 a while but now it's over revving and when im braking the engine cuts out(which aint much fun on a corner coz the steering locks). A friend suggested changing the airflow meter but another friend said he had a similar prob and he cleaned the airflow meter with carb cleaner and that done the trick. Not very knowledgeable about cars so please simplify ur response, not gonna attempt to do anything myself but would like to know wot im in for price wise!
Thanks in advance!
Vikki

[Marks DTM Calib]

Can you tell us the engine size and number of valves if a 4 cylinder.

It sounds like a sticking idle vale so I am guessing its a 4 cylidner 2.0 16V......

[VikkiH1978]

dunno about the cylinder bit but its a 2.0 Gls 16v. So does that have anything to do with the air flow meter then?

[megaomega123]

More likely Idle Control Valve (ICV) than air flow meter. I would start by cleaning then lubricating the ICV and take it from there. It'll cost you nothing except a can of carb cleaner.

[VikkiH1978]

Thanks! Where do i find that then? A rough idea would help. Have to learn about engine management sumtime! :-/

[VikkiH1978]

Just spoke to my hubby and his friend put it through a diagnostics pc and said it was the air flow, never mentioned it! he's gonna try the carb cleaner on it but doesnt know where it is. Do u know where i can find a picture?

[Marks DTM Calib]

NO....carb cleaner can bugger MAF's up....

It will be an air leak which will be throwing a MAF fault (MAF low I suspect).....check inlet trunking for splits etc and make sure all the breather pipes are good and in place.

I see so many MAF's miss diagnosed as faulty due to poor fault finding!

You should consider celaning out the breather pipes, throttle body and idel valve to.

[Grumpy]

Hi Vikkie.
Have a read of what I put on this thread.

http://www.omegaowners.com/forum/YaBB.pl?num=1184578248

Then, for a quick check, get hubby to disconnect the smaller breather pipe
from the Cambox cover and try blowing down it.
This will give you a good idea if it's blocked.
Depending on result, post up your findings and we'll take it from there.

[Danny]

dunno about the cylinder bit but its a 2.0 Gls 16v. So does that have anything to do with the air flow meter then?

I have a 2.0 GLS facelift Vikki and I had the very same problem, it was cured by having the ICV, throttle body and breathers cleaned out, as mentioned by Marks DTM, so you might wanna try that first

[VX1]

As said above vikki, try that out first and it should cure the problem. I had same problem with my last four omegas and they all done the same thing as you have described. Changed the idle control valve and cleaned relevant pipes and cured it. Fingers crossed still have no problems to date.

[ians]

I think all 2.0 DOHC's have this problem - mine certainly has.

Grumpy's post above is really excellent - should go in the maint guide section IMHO.

The key is not just clean the ICV , but also the breather pipes and throttle body.  Especially the thin breather pipe and its port into the intake below the throttle body.

Think we need some pics of this.   Its a pretty straightforward job but needs doing thoroughly.

[VikkiH1978]

  Thanks for all the help, sounds a bit complex but will give it a bash!

[VikkiH1978]

Pix would help if anybody knows where id get them!  

[Danny]

I cheated, i got a garage manager friend to do mine for me

[VikkiH1978]

i know a few mechanics so im hopin to get one of them 2 do it! Fingers crossed!