hello, i have a problem with my s1 r33 skyline. It has a pod filter, front mount intercooler and 3 inch cat back exhaust apart from that i think everything else is stock.
when i start driving in the mornings or when the engine is cold everything is fine, makes good power all the way to 7000 rpm but by the time the engine has got to normal operating temp it feels like its misfiring from 3000 to 5000, then is ok to 7000rpm. Even driving normally under light throttle it will feel like its misfiring as soon as the revs get close to 3000. It has new plugs gapped to 0.8 and brand new coils (superspark) and the injectors have been cleaned and tested.
would really appreciate any help or advice