Could any one help me with my 1989 s2 turbo. It doesnt seem to pull as hard as i think it should in the higher gears.it feels like its holding back like a diesel with a blocked fuel filter if you know wat i mean.wen i ease off the throttle slighty it seems to help.a bit. Its been on rolling road and everything was ok but when the engine is pulling the car i can feel the problem. The enginge has been rebuilt.new fuel pump and filter.new plugs leads and distributor.