my 2008 s3 Sportback recently starting revving on its self. when on idle and when coming to a stop with the clutch depressed. the revs sometimes go upto 2000rpm and then when it comes down it make like a miss fire sound..
since i have read about this problem on here before everyone seems to say replace the PCV. I've done this along with the gasket and still no change in the erratic idle.
has anyone got any more suggestions???
ive not had it scanned since it started maybe that would help i don't know as there are no engine management lights on etc.
any ideas welcome cheers curtis