Hi everyone I have a Audi a4 b7 2.0 turbo petrol recently fitted a new engine to oil pump fail and damage engine code bwe so got a new engine bwj fitted it all works fine but keep having clutch problem fitted brand new dual mass flywheel and clutch and slave bt every now a the I lose the clutch pedal but it always comes bk up. Would like if there any differents in the engine in fitted to my old one thanks Ashley