my damn gsr swap blows a grip of smoke, i mean a grip haha, while in rpms...4500 - vtec and while in vtec it bogs and goes and bogs and goes. drives fine when im cruising. stock gsr with a skunk2 chipped p28. can it be the chipped p28? put in a chipped p30 and it ran strong with no smoke or probs. the skunk2 program cant make it run that rich can it? maybe the p28 is fcked up. no codes thrown. help me out if u guys can

ps. the smoke is black

 

Black means your running way too rich, I wouldn't drive it for long, your rings and cylinder wall will go out next due to too much fuel, it will act as a cleaning agent taking the oil from the cylinder walls hence less protection.

 

Yea, what LudaChris said, black smoke means you're running rich. I don't see why you're asking this question though, since you said that it runs fine with a different ECU. You stated the answer/solution to your own problem.