i got the swap complete. the car runs pretty strong. but i have a misfire code on all 4. and below 2000rpm if you go half throttle or more the car spits and sputters and coughs and just acts all kinds of stupid until a little after 2000rpm then it will striaghten up and take off. i'm going to get some new plugs tonight. i checks the cel in the car i took the motor from before i pulled it all. it too had random misfire codes on all four. what gives? any clues? idle fuel pressure is about 30 with the regulator hooked up. whats it suppose to be?

 

doesn't do it when its cold. only after it hits operating temp.

 

anybody? could it be a bad o2 sensor leaning the motor out?