hi folks any one got an idea as to the solution to the following problem.96 N escort cosworth totally standard apart from induction kit and cat removed.on de-accelloration ie lifting foot of pedal the car judders and sometimes the revs drop right down and even stalls at times. on acceleration the boost comes in until roughly 3500 rpm then (although the gauge reads full boost) feels like it is just a 2.0 ltr car with no turbo. have changed plugs filter ect.the car runs perfect when on choke so im thinking it could be a fuelling problem.CHEERS in advance