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Miss Fire?


jas98

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  • Member
  • Member For: 12y 5m 12d
  • Gender: Male
  • Location: Maryborough Qld

BA xr6t sedan, stock besides cat back exhaust sytem

Ok, it seems that when giving the car a bit (and boosting) and just as its about to change gears it feels like it miss's a bit (not overly noticable but you can feel it)

gear box changes fine when it does.

however I know most would say coils/spark plugs but read on

I replaced with some ebay coils trying to eliminate this, but it did not, now have tried a set of new genuine ones as me mate brought new ones for his and I asked if I could try them with mine.....still the same!

what else could it be (if there is even a problem haha)

things I have replaced and still there (replaced for other reasons)

injectors

coils

spark plugs

gaskets

TPS

PVC valve

o2 sensor

few other things I cant remeber

also when it does this its only boosting to 5psi used to go to 6-7psi (stock tune) so not overboosting....?

any ideas? fuel pump maybe?

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  • Member For: 12y 5m 12d
  • Gender: Male
  • Location: Maryborough Qld

lifter?

how would I go about testing this? could it be a little clogged?

Does it do the same if you have the traction control turned off?

I will have to trie this as I normally drive with it on haha. however would the traction light come on though? is it does not when it does this.?

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  • WOT?
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  • Member For: 11y 10m 10d
  • Gender: Male
  • Location: Frankston, 3199

Not sure if it's playing up - it's a long shot, but was just thinking of things that may cut power and be easy to test

Edited by raband
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  • Member For: 12y 5m 12d
  • Gender: Male
  • Location: Maryborough Qld

true, it does actually feel like traction kicking in, but not as servere (as when traction control does)

can a blocked or poor flow fuel filter have an effect like this? reason I ask if=s I replaced it with a airflow brand one a while back and not sure if it did it before that or not..

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