tps problems
 

i have an 88 supra turbo 7mgte when i the tps is blugged in it rev up to 2500 rpm then goes dwn but when i plug it in it revs all the way up but even with it plugged it still has no power. Any idea why its doimg that plz let me kno? Ik this is a common problem with this supras, so if any one knows wats wrong let me know

This was posted in the wrong forum. Moved to the MKIII discussion forum.