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[V6Astra F]

Hi Guys

This is realy getting to me the car runs fine till you stop to put in some petrol or just stop at the mall . As soon as you start the car when its still at operating temprature and drive off it stutters/missfires almost as if its loosing spark or not getting fuel , the strange thing is when you put your fut down hard and it gets past 3500 rpm its fine and doesnt do it again till you switch off again , I have noticed the same simptoms when the car is first started in the morning but I dont drive it hard then I just wait for it to get up to temp and then its ok . Tested it by just driving under 3000 rpm then it goes away after about 1km . I have no fault codes stored and no EML light , have new plugs , leads and ect installed . Now im thinking it might be a lamda sensor , coilpack , tps or the ecu itself or even the crank sensor or cam sensor . I have a x30xe Motronic 2.8 ecu as spare that I can test but I would like to know what you guys think . What I dont get is that it goes just fine thats the only problem I have at the moment . Went back to the 3 bar fpr and we did test for leaks on the intake but there are none , had a leak on both exhaust manifolds thats sorted now . I know its hard to explain so I hope I got it right  :-?

Will try to get a video of what its doing , but heres one I did in 3rd gear from 40 to 120 kph . As you can see its running ok

[V6Astra F]

Ok its between 1800-2700 rpm  . Cant hear it if you rev it , only under load could it be the coilpack ? But why does it come right  :-/

[V6Astra F]

Forgot to add that it also did it before the Unichip was installed and there is a new fuel filter and pump installed . Will it make a difference if the lambda sensors installed on different hights becase the place that made my downpipes mounted the front sensor lower than the one on the rear bank

[Smooth]

Did you try disconnecting the maf and see if it makes any difference,had a similar problem before and this was the cause

[V6Astra F]

Thanks will try it 

[V6Astra F]

Ok it turns out I do have one at home , however I think its from the c20ne motor . Do you think it will work ?

[V6Astra F]

Just an update I unplugged the maf and it ran fine  :-? so I guess its time for a new one .

Thank You 

[Smooth]

Good work.Sensitive little buggers

[V6Astra F]

 :-/ Swopped it out with a spare one I had , problem came back . Could the TPS also cause this ? . Or maybe the other one is buggerd too 

[V6Astra F]

Some live data I got with "My Naff Code Reader".Spark Angle before TDC (Top Dead Centre) sill in negative at idle  :-/ , Hall Sensor goes from inactive to active thats normal right  :-? . Also noticed its there when the car is cold aswell 

http://www.mediafire.com/file/nmwzzybtgyw/Livedata_1996_Omega-B_Engine__X 25 XE_201005051835.csv

[V6Astra F]

Ok

Swopped out the TPS and MAF can a Camshaft sensor do this ?

Had a nice look at it this morning its between 2000 and 3000 rpm , could sparkplugs do this as I am using the ones autodata said I must use ? . But it is kangarooing to better describe it

[V6Astra F]

Think I got it sorted , took out the ecu and replaced the eprom with one from a x30xe mv6 ecu . Seems to have stopped  8-)

Thanks Guys