My car recentley was rebuilt had a full engine remap etc.. now for some reason its lost all power does not rev past 2000 revs and wen it does it does about 40mph tops.. it had its last outburst of pure power tday then loads of black smoke piped out the exhaust and the car stinks.. was thinking turbo. Diagnostic was sayin maf but thts been replaced and filters hav been changed.. the car was missing a filter so i thought maybes it had of sucked something up n caused a blockage if i turn the car off for a while it goes alryt for abwt 20 secs then bk t nothing?? Please help??