Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: flyer 0712 on 11 June 2015, 18:31:12
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My 2.2 omega just lately has been playing up on startup...it takes more turns of the engine to fire up than normal and then runs as if the choke was on..it runs just a bit lumpy on tick over 500/600 rpm but increase this just a little to around 800rpm and she runs just fine,all through the auto box is as should be and picks up speed as it should....not using any coolant so i assume the head gasket is fine...when slowing back down from normal running to tick over it then begins to run a bit rough...not quite as bad as missing on one cylinder but just feels as if it will cut out at any time....any ideas please.. :y
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Take the throttle body off and inspect/clean it, make sure breathers are all clean too.
While there pop plugs out and see what's what.
Try and get a code reader on it :y
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Cheers Tunnie.....taken plugs out.(bosch 3 months old ) and they all look the same colour and condition...changed the coil pack.just in case.....I have a throttle body from the low mileage omega that i have just scrapped,so dug that out and made sure that it is clean and all tubes are clear ,,also have the throttle body new gasket and the gasket for the breather that goes from cam cover to sump.So tomorrow hopefully change the body over and clear out all of the breathers and then see if it is any better,,, :y
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While your at it check for vac leaks - i had same and turned out to be EGR gasket :-\.
Found it (eventually) by "sparingly" spraying brake cleaner around the inlet/servo/EGR area, tickover briefly went back to normal when the gas found the leak.
HTH Phil
edit: it could also be the EGR permanently open - normally opens when you increase revs. A good test is to temporary blank it with a plate (i cut down a coke can) the same shape as the gasket with no hole in the middle
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Cheers phil....i have noted that and will give it a try.....some people blank off the e.g.r. valve completely and just have the light turned off when it comes on.....so is there any harm in doing this or is it better to use the e. g .r .....as intended by vauxhall.. :-\ :-\
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This may be of not help at all, but on my current brand of motor, if the egr sticks in the 'open' position it can give difficulty in starting but once warmed up it shouldn't have much effect. If stuck in 'closed' position shouldn't really affect starting.
As Sir P states above, try the coke can trick to see if it helps.
Should confirm if its an EGR fault at least.
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Cheers phil....i have noted that and will give it a try.....some people blank off the e.g.r. valve completely and just have the light turned off when it comes on.....so is there any harm in doing this or is it better to use the e. g .r .....as intended by vauxhall.. :-\ :-\
Your not removing the EGR just blanking it (put the EGR & gasket back on) so it will not feed exhaust into the inlet at any time.
On the 2.2 it probably will not make any noticeable difference if you leave it there, if the EGR is faulty, saves you having to replace it until you are ready :y
Look here to see my exploits http://www.omegaowners.com/forum/index.php?topic=126804.msg1617741#msg1617741 (http://www.omegaowners.com/forum/index.php?topic=126804.msg1617741#msg1617741)
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Thanks Phil..just read that and very helpfull. :y
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Removed the throttle body tonight and was amazed how much carbon was on the underside of the throttle flap and around the inside of the unit...it was so badly clogged that the very small hard plastic tube that connects at the bottom was full and the casting itself was clogged so could not blow air through it.....so now have a nice clean throttle body and hoses and will do the sump tube tomorrow,,,,just seen on here that when replacing the throttle body with another one you should turn ignition on for at least 30 seconds before starting up as the ecu needs to connect to the unit,,,,so hopefully when I try it tomorrow it should at least be a bit better,,,thanks to all :y
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Throttle body easily clogged. Even with oil changes every 5k.
Worth cleaning once a year :y
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I change oil/fiter twice a year ( only do around 5000 miles a year )and use the dearer petrol....to be fair I have only just bought the car so maybe if i show it a bit of care it will turn out to be nice to me,, ;D ;D ;D
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Started car up today,,,,no different after cleaning breathers and changing throttle body.......now the emissions light has come on and it is missing on tickover and up to about 2000 revs standing still but drives ok until stopping and then tick over very erratic....so what else could it be,??????...would it be the cam sensor ???...the fuel filter looks to be very old,,but if it was petrol surely it would not drive properly at speed.....although recent spark plugs fitted ( Bosch ) and they still all look the same colour could it be the plugs...is it worth changing them once again,,,already changed the coil pack,,,so any ideas please ,thanks.
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I say its the emissions light that has lit up....,,,its the one that looks like an engine block ....
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Started car up today,,,,no different after cleaning breathers and changing throttle body.......now the emissions light has come on and it is missing on tickover and up to about 2000 revs standing still but drives ok until stopping and then tick over very erratic....so what else could it be,??????...would it be the cam sensor ???...the fuel filter looks to be very old,,but if it was petrol surely it would not drive properly at speed.....although recent spark plugs fitted ( Bosch ) and they still all look the same colour could it be the plugs...is it worth changing them once again,,,already changed the coil pack,,,so any ideas please ,thanks.
What have you done with the EGR?
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Nothing yet as rain stopped play....so providing it does not rain tomorrow it is next on my list as you advised me...so will post results after blanking it off..thanks :y
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I do not blo---y believe it :o.......No time today to look at egr valve...so started the car and as recently it hunted,,stuttered,,on tick over...anyway drove it all was ok as usual, and popped in local petrol station to refuel...put £40 in and continued on my way..each time car slowed down it ran like a pig...I did around 20 miles in it before returning home..and then i noticed the tick over had returned to normal,,,turned engine off and re-started it and it ticked over nicely,,,left it for two hours and then took it for a run to find that it appears to be ok now.(fingers crossed),,,then I remembered putting fuel in it around ten days ago at a Sainsburys petrol station and on visiting there half of the pumps were not available as the petrol tanker was in there refilling the tanks,,,so is it a coincidence that they had run so low on fuel that the petrol i purchased had water in it and now that has virtually used up and I have refilled with good stuff that it has worked its way through and will now be ok.......Would this have made my car run so badly on tick over and be harder to start or am I just hoping,,,regardless i will do the egr valve and give the old gal a good going over as the person who owned her before me certainly did not service/look after her at all... Thanks for all your good advice I have learned a lot from you all and hope i can pass this help onto others who are having problems with their migs, :y :) :)
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the egr blanking plate arrived today and my question is.....do i use any gasket cement on both sides of the plate to make it air tight when i bolt it on between the valve and manifold...thanks :y
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the egr blanking plate arrived today and my question is.....do i use any gasket cement on both sides of the plate to make it air tight when i bolt it on between the valve and manifold...thanks :y
Quick answer, No, but leave the original gasket in
Is it still running fine with the different fuel ?
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You know what, in nearly 10 years, 180k. I've never cleaned EGR, on my 2.2 :-[
Perhaps I should!
What benefits are there with blanking it off?
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You know what, in nearly 10 years, 180k. I've never cleaned EGR, on my 2.2 :-[
Perhaps I should!
What benefits are there with blanking it off?
So as to find out if, or exclude it from, possibly causing the problem.
AFAIK there is no benefit from it being permanently blanked (or even cleaned) on a 2.2, if anything I have read that fuel consumption will go up
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Thanks. I've never had cause to look at it, next time coil pack comes out, I'll take a look.
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Yep after refilling with fuel all symptoms have gone and car now runs very well once again...convinced now it was water in the fuel....perhaps i will leave the valve as it is or at most clean it,,,,,it is only that the light is now on in the dash ( the engine block looking light ) although does not affect the running of the car.....matter of asking,,would it fail the mot with that light illuminated on the dash..ta much