So my bestfriend bought a 2003 Mazdaspeed protege. When he bought it, it would pour black smoke from the exhaust. He got it fixed. He was driving it on95 and he blew the HG. So he had the engine rebuilt. new forged pistons, valves, rings, hg, timingbelt. When he got it back it would still still smoke. So he even bought a new GT2860 He put that in but it would still smoke. We've checked the oil return line, sent the turbo out to get inspected and came back clean. We did however find that the oil restricter on the feed was taken off for some reason. So he bought a new restrictor and installed it and it still smokes! Anyone have any ideas?? any suggestions are greatly appreciated!! Thanks,
Chris.
Chris.