just put a new engine in my mr2, now it bogs out at 3000 rpm is this a map sensor problem or a maf sensor problem.. some1 please help

There are 3 different types of MR2s with at least 5 different engine options, which do you have?

If you have the turbo MR2, the MAP sensor does not have any affect on how the car runs. Bogging could be the AFM (air flow meter), but not necessarily.

Bogging could be a lot of things.