Hi everyone, My s1 rst has developed a miss fire over the last week,
it only happens when it's cold if i start the car up and let it run for aprox
5 min and then drive it, as soon as it comes on boost it starts missing like mad but once the car is warm she runs like a dream. there are no air leaks and the engine has just had a full re-build the only thing none standard is a Kent cvh 35 cam kit s/steel exhaust and a k&n air filter and the boost is set @ 9 psi.

has anybody had this problem before if so i will take any commnts as to what it could be as i have drawn a blank so far.

Thanks

Mark