i just got this nice swapped ef with zc motor. the previous guy said he had some problems with it like after he warms it up it dies sometimes but i have not had anything wrong so for. what i do see though, is code 4, 6, and 8, on the computer. the computer is not bolted down. does it matter if it is not?? and do the codes mean the same as the orig motor?? i know i'm asking a lot but all help is very appriciated, thanks, chip