I come across a problem with my S3 yesterday, when driving gently it's seems fine but when I put my foot down a bit and the boost comes in strong (around 2500-3000) I get what feels like a misfire, just like when a coil pack goes. Happens in any gear, basically when the boost peaks.
I've dowe a scan and it's not showing any faults, also a missfire log and no cylinders are missing, also done the maf test thing recommended for checking for boost leaks, at 3000rpm I'm getting 8g/s am I right I thinking it's got a small boost leak? as I should be getting 9-10g/s
Would this cause my miss/juddering problem? Anyone else had a similar problem?
Hope someone can help, cheers