Re: Audi a3 TSI Random misfire
low fuel pressure, the bucket that the high pressure fuel pump runs off the cam wears out on the tfsi probably the same on these , timing chain stretch, carbon build up on the back of inlet valves, faulty fuel injectors, just a few of the problems that the modern reliable vw engine has.
poor fuel quality , any diesel in there ?
stick it on a gas analyser the hc goes through the roof when the injectors play up .
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