palmer s13

hey guys new to the forum but i need help with my car ita 89 240sx with the single slammer ka it sounds like a misfire at idle and when i rev it cuts out and goes into limp mode i thought it was MAF so i tried 3 diffrent ones still doing it tried messing with the ignition timing got a little better with the idle but its still in limp mode i have no idea what else it could be i tried 2 diffrent MAF's one from a dual cam ka and one from a 98 altama neather of them fixed it the only other idea i have is TPS sensor or my ecu went bad.
also it revs out farther when its cold but once it gets warm it only revs to 2500 HELP!!!!

update changed the coolant temp sensor and still nothing

MamangSorbetero

Have you changed any O2 sensor