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[ians]

Still trying to solve my lumpy running problems.

The plug wells are now dry,  new plugs and leads fitted.  Throttle body/breathers were only just cleaned recently (and ran fine afterwards).  No EML on.

Feels like it is missing/misfiring  - most noticable at warm idle (c 700rpm) - heavy vibration - and when under load running rough and not pulling well at all.

Is it DIS pack next?  

Cheers,
Ian

[Craig_R]

700 RMP is alittle low for a 2Litre 4 Pot it should Idle around the 900 to 950 mark a V6 Idles around the 600 mark

[holey head]

my 2.0l 4pot idles at 500rpm, regardless to whether it warm or not!!!! should i be worried then?

[star_whites]

My 2.0 Auto 1998 also runs at 550rpm and purrrs at the moment.

[holey head]

mine idles fine just actually running that is not so good. limits at 4500rpm, changed camshaft sensor. gunna reset ecu later an see if it sorts out cause it not withjust changing sensor!!!

[Craig_R]

Hmmmm May be I am Idle to high but i remember asking awhile ago about 4 pots and i was told 900 was about right for them I would be intrested to see what RPM other peoples Omegas Idle at

Craig

[Markie]

Hmmmm May be I am Idle to high but i remember asking awhile ago about 4 pots and i was told 900 was about right for them I would be intrested to see what RPM other peoples Omegas Idle at

Craig

I would agree.....4 pots certainly over 700...2.5`s just over 500rpm and 3.0`s just under 500rpm

[spookyman60]

ok this is what i have
2.0 8V 670 - 930 none adjustable
2.0 16v 700 - 1000 none adjustable
2.2       700 - 930 none adjustable
2.5 24V V6 570 - 750 none adjustable
3.6 24V V6 580 - 800 none adjustable
3.0 24V V6 570 - 750 none adjustable
3.2 24V V6 580 - 800 none adjustable
ofc to have the idel adjusted they want £30 for diagnose and then if they find a problem the price for the fix aswell and that is b4 they plug it up
they wouldnt give me a price on tick over adjustment for mine hth these are the figures i have on my workshop manual for the omega b range

[VX1]

Ian cause's for missing/miss firing.

1. Worn, faulty or incorrectly gap spark plug's. (not this as new plugs fitted)
2. Faulty plug leads. (not this as new leads fitted)
3. Vacuum leak at throttle housing, inlet manifold or associated hoses.
4. Engine managment system fault.
5. Uneven or low cylinder compressions.
6. Disconnected, leaking, or perished emission control system hoses.

Cause's for lack of power.

1. Timing belt incorrectly fitted.
2. Fuel filter choked.
3. Fuel pump faulty, or delivery pressure low.
4-5 the same as above.
6. Brakes binding. (won't be this as you would notice)
7. Clutch slipping. (wont be this as yous is an auto?)

Hope this helps Ian, got all this from the manual wether its right or not who know's but something to work from.

Paul

[VX1]

ok this is what i have
2.0 8V 670 - 930 none adjustable
2.0 16v 700 - 1000 none adjustable
2.2       700 - 930 none adjustable
2.5 24V V6 570 - 750 none adjustable
3.6 24V V6 580 - 800 none adjustable
3.0 24V V6 570 - 750 none adjustable
3.2 24V V6 580 - 800 none adjustable
ofc to have the idel adjusted they want £30 for diagnose and then if they find a problem the price for the fix aswell and that is b4 they plug it up
they wouldnt give me a price on tick over adjustment for mine hth these are the figures i have on my workshop manual for the omega b range

Just to let you know but all the idle's are adjustable BUT only through the tech 2 they can't be done manually.

[spookyman60]

ok this is what i have
2.0 8V 670 - 930 none adjustable
2.0 16v 700 - 1000 none adjustable
2.2       700 - 930 none adjustable
2.5 24V V6 570 - 750 none adjustable
3.6 24V V6 580 - 800 none adjustable
3.0 24V V6 570 - 750 none adjustable
3.2 24V V6 580 - 800 none adjustable
ofc to have the idel adjusted they want £30 for diagnose and then if they find a problem the price for the fix aswell and that is b4 they plug it up
they wouldnt give me a price on tick over adjustment for mine hth these are the figures i have on my workshop manual for the omega b range

Just to let you know but all the idle's are adjustable BUT only through the tech 2 they can't be done manually.

ok granted il give u that but as it also states yes ur correct but tell me something does a 1995 1994 like mine support tech2 at all?

[VX1]

ok this is what i have
2.0 8V 670 - 930 none adjustable
2.0 16v 700 - 1000 none adjustable
2.2       700 - 930 none adjustable
2.5 24V V6 570 - 750 none adjustable
3.6 24V V6 580 - 800 none adjustable
3.0 24V V6 570 - 750 none adjustable
3.2 24V V6 580 - 800 none adjustable
ofc to have the idel adjusted they want £30 for diagnose and then if they find a problem the price for the fix aswell and that is b4 they plug it up
they wouldnt give me a price on tick over adjustment for mine hth these are the figures i have on my workshop manual for the omega b range

Just to let you know but all the idle's are adjustable BUT only through the tech 2 they can't be done manually.

ok granted il give u that but as it also states yes ur correct but tell me something does a 1995 1994 like mine support tech2 at all?

If my memory serves me correctly I had an 'N' reg Omega and needed to get a new key fob programmed and I am sure they used the tech 2 but again not sure but someone on here will be able to tell you, one of the tech heads on here will tell you.

[cbx550bertie]

try changing the engine mangement relay...thats what caused my probs in the end an it sounds very much like wot was happening to mine i think they are bout £20 from any vauxhall specialist dunno bout dealers though..as for tech 2 you should be able to use it on your miggy i got mine checked via one an thats how we found out bout the relay...