Havin probs with my S4, again! Surprisingly! When I start it up, it idols badly, hunts around the revs up and down and eventually stalls, if you give it any gas it just won't go, coughs splutters and dies. Thing is with MAF unplugged it'll idol fine, driveable but just with not a lot of go. So you'd think knackered MAF but had 2 brand new Audi units on it now and still no joy. Any ideas anyone? Anything? Before I bite the bullet and drop it off at Audi.....for them to empty my wallet!