Engine problems seem to go from bad to worse
Drove the car for the first time on Saturday since conversion and its got no exhaust on at the moment, however when I accelerate I hear the turbo spin up but as soon as car hits 4000 rpm something seems to cut in and the car nearly cuts out. However slowly or quickly I try and accelerate it will not go past 4000 rpm. I'm getting really stressed with the engine now as had constant problems and i'm just hoping this isn't going to be expensive to fix. It won't be anything to do with the exhaust not being on will it?
Any help appreciated