Fordfoxbody88

Okay so i have a 1992 mustang lx 4 cyl did the whole v8 conversion now i made it efi and im have problems with the idle surging. also when im just cuising not giving it much gas it starts to buck and carry on. i ran codes and i got 81 82 and 85 im not to sure about 81 and 82 i did get one of the solieniods for it but i dont have the other and im not sure how all the vacuum lines run on the car so could this be causeing my irratic idle or what are your oppinions on this. please help