boost problem

(Car is a 2004 Leon Cupra R BAM 225 not mapped has ramair cone filter and miltek cat back) Hello gents i changed my plugs yesterday all came out smoothy and new plugs in (ngk pfr6q dealer spec same plugs as old one) however now on full boost the car misfires as soon as it hits full boost, ive...

hi all I seem to have a problem, Now this could be completely normal but I doubt it as never experienced it before. I installed a new defat full system recently and no boost doesn’t build till about 3.5k and when it hits around3.5 k it’s like a switch it hits hard there’s absolutely no gradual...

Hi my 2003 seat leon 1.820v t has developed a flat spot/ surge at higher revs/ higher gears, more noticeable over 50mph it's like your outing your foot on and of the throttle constantly. Had a stage I remap a few months ago and fitted a milltec cat back system all fine, then fitted a forge...