im pretty sure the engine isnt the problem i've checked nearly everything..when i pulled the ecu out from under the carpet...its a pw0...i saw that around 15 wires had been spliced and some werent even connected...my engine will run but under 2k rpm it sputters and has to work really hard, and after 3k its like it hits a rev limiter of sorts but it doesnt sound like my normal one...it also backfires flames....kinda cool but i would rather it ran good