I have a swapped Ls CRX. Recently my tranny blew it's guts. The day before it did I put a can off seafoam in my tank. The car sat for a couple days without being run. Now that I got it back going in between 2500-3000 rpm's it now stutters and smokes. After a little while the check engine light comes on and the car has full power and feels like it got a extra push! I flushed the gas put in 93 octane so far. Any idea what this could be?