when you let vehicle revs drop to 1500rpm/3rd gear then put foot down,car looses power & holds back badley &jerks badley.
Have read fault codes but no codes stored,have attached vaccum gauge to inlet manifold,0 vaccum at idle,vaccum will increase with revs upto 15inhg then drops to zero at 2500rpm at the same time the engine note changes indicating a loss of power.???????????