Quote Originally Posted by Cynical 1 View Post
o2 sensor could be causing it to run rich and bog. when you floor it, or return to idle, it ignores the o2 signal, and runs off base map (open loop) and runs fine.

IAT could be "tricking" the engine into thinking it is getting colder air than it is, again causing a rich.

i'd bet o2 though.

just my guess.
x2