Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: terry big timber on 06 October 2010, 10:58:05

Title: Low Idle speed MV6
Post by: terry big timber on 06 October 2010, 10:58:05

Help please. Engine is 'lumpy' at tick over and when I am driving slowly.

My Idle speed is only 500/600rpm.

What does the throttle valve switch on the throttle body do?

I did a pedal trick test but I can't find the list of fault codes. I am sure I have seen it on here somewhere.
Can anyone direct me.

And lastly,  could it be the airflow meter? It seems to be a bit worse in damp conditions.

Too many questions! Sorry boys!

Title: Re: Low Idle speed MV6
Post by: Jimbob on 06 October 2010, 11:02:36

codes can be found in my signature....what did you get?

MAF errors are not uncommon on the 3.2..

Title: Re: Low Idle speed MV6
Post by: Andy B on 06 October 2010, 11:21:52

Quote

....

My Idle speed is only 500/600rpm.

 .....

That's about right when the a/c is off  ;)

Title: Re: Low Idle speed MV6
Post by: Jimbob on 06 October 2010, 11:59:05

from email : My readings on the pedal test were:

10  7  10  4

10  4  3  10

10  6  5  10

10  4  2  10

So..
0704 - Clutch Switch Input Circuit Malfunction - guess this would only affect cruise control, not sure  :-/

0430 - Normal 3.2 pre cat efficency - dont worry (move the lamba sensor as per guide is the fix)

0650 - Malfunction Indicator (MI) Control Circuit  - Assuming your EML works (it must, to have got these codes, then dont worry.)

0420 - Normal 3.2 pre cat efficency - dont worry (move the lamba sensor as per guide is the fix)

hmmmmm

Title: Re: Low Idle speed MV6
Post by: Jimbob on 06 October 2010, 12:04:45

How well serviced is the car? 
Newish Air filter? 
fuel?  supermarket, or branded?


revs not really an issue, but not running well is, could just want a good service, new filters, plugs, some injector cleaner running through, or a good italian tune up, better petrol.  All possibles....

Title: Re: Low Idle speed MV6
Post by: TheBoy on 06 October 2010, 20:12:03

Sounds like the classic air leak symptoms to me...

Clean breathers/throttle, check for leaks, then see what its like