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[andymp]

Hi. Around a month ago I purchased a 2003 omega CD 2.2 dti estate. Running quite rough. After changing the MAF sensor,  cleaning the swirl flap assembly (and finding only 3 flaps...)  and also changing the badly perished and collapsing vacuum U bend from the vacuum pump to the entire vacuum system, the car now runs fine. Until you corner left pretty hard. When it seems to "kangaroo" and blue smoke comes from the exhaust. In a straight line,  or cornering right, it pulls smoothly. Has anybody heard of this before?

Thankyou for reading

[andymp]

Oh and the eml light doesn't come on when it cuts out. However it comes on when you try power over 3000 rpm and goes back off when below...

[jonny2112]

Does it actually stall? That could be hairy I'd imagine 
Don't think the pedal trick would work on that car so can you get the codes read somewhere?
That would certainly help towards diagnosis.

[andymp]

Hi. Thankyou for your reply. The car doesn't stall, it judders heavily whilst turning left, such as when pulling away from a roundabout... and is ok once I straighten up. It is when I turn left at speed, so the cornering force is affecting something.
The pedal trick doesn't work, and a handheld OBD-II scanner doesn't find any fault codes (but there again, it didn't when the EML light was on before changing the MAF sensor lol...). Are there likely to be any codes stored when the EML light is off?

[jonny2112]

I think if a code is raised then it stays stored until its erased. A fault reader should have picked it up though. Any suspicions around the fuel system?

[andymp]

I might purchase "Vauxcheck" to see if it finds anything? Don't think there are any problems surrounding the fuel system. No leaks etc.

[jonny2112]

Was just thinking the kangaroo / juddering may have been what you'd feel if you were running out of fuel, and therefore a level problem somewhere which manifests itself on a hard turn.
Just an assumption though. I'm hoping someone with proper knowledge will be along soon to help.
And what is 'Vauxcheck' by the way ?

[andymp]

The fuel starvation idea makes sense... would also explain the absense of the EML. Its 1/4 full at the moment, I might try it with a full tank. Does the 2.2 DTI have a lift pump in the tank?

Vauxcheck :-

http://www.enginecheck.co.uk/vauxcheck/

Its a piece of software that comes with a ELM327 lead. Not sure if it'll be of any use.

[andymp]

If it makes a difference, when I removed the injector pipework to remove the inlet manifolds, upon reassembly, I couldn't get it to bleed. I couldn't get fuel to the upper injector unions... until I connected the leak back pipes... and then it bled first time.

[jonny2112]

The mechanical stuff is all beyond me, but I just thought fuel problems may have made some sort of sense.
I wouldn't advise spending any money at this stage though, as the forum is the best place for help, and I'm sure someone will be able to point you in the right direction 

[andymp]

Hope so... Its so near, and yet so far. It makes it difficult when you don't know the history of the car. For example, there was only 3 swirl flaps, and the lower gasket is missing. There was no sign of the 4th swirl flap anywhere, so I wasn't the first person to look at it... I am looking for a swirl flap assembly and then I'll replace the missing gasket.

[andymp]

Look at the final post about a swirl pot in the tank... Hmm! 

http://www.vauxhallownersnetwork.co.uk/index.php?threads/help-2-2-dti-engine-problems.200608/

[Marks DTM Calib]

Indeed, check the swirl pot and pickup in the tank

[andymp]

I filled it to the brim last night and it still does it. But only when the engine is warm? 

[andymp]

Is the MAP / boost sensor affected by engine temperature?