help bad missfire

[fiveohhfox]

i got a 88 gt with a 90 motor im running a speed density computer with a 90 motor but im not running no mass air will this cause my miss fire? im just running a regular intake with no mass air meter can anybody give me any other suggestions i would really appreciate your help thanks

 

[SBF Coupe]

Well first off you need to find out how many cylinders are misfireing... Is it all the time? Only at certain rpm range????? Did a injector take a shit? When you did the swap is everthing connected, is the dizzy in right? You need to go thru everything one step at a time and recheck everything you did.

 

[fiveohhfox]

well i only get a missfire under 2000 rpms and my injectors are clean could it be electrical?

 

[thrty5thsc]

This sounds like my car. Hows your fuel pressure? Check your egr out too. Got any codes?

 

[fiveohhfox]

well i thinkl im over fueling cuz it smells like fumes bad wen i had this motor in my other stang it ran like a champ