Originally Posted by K_never_broke_again

ok so just to clear things up, it runs for longer with the new sensor, but still eventually goes into limp mode? and when you say you can turn it off and on again and it wont be in limp mode, does it stay out of limp mode for the rest of the drive? Also you said it dies when the MAF is unplugged, this seems weird because normally an unplugged MAF would be the cause of limp mode. not sure but the weird iacv behavior could be causing this. another idea, this is speculation but you might have a vacuum leak, although i don't see how this would cause limp mode only when the engine is warm. You mentioned in the op that your dash lights come on and off, are there any other weird electrical issues? The more information you can provide the easier it'll be to fix the problem. any sort of weird stuff thats happening would be good to know about