uvastang

i recently swapped a 87 5.0 into my 93 foxbody that had a 2.3L and the wiring harness and computer almost connected to everything but i have a few questions.. if i get a 93 mass air harness will i be able to use the same computer? also i have heard of about some type of wiring to adapt speed density to mass air but im not sure how that works...?? caz anyone help?? i have everything connected and the car cranks but it doesnt start and theres no spark but i believe the connecter that is left alone takes power from the key to the computer and coil but im not sure and need some help.. anyone with ideas or have run into this problem before please help me.... thanks!!

mjr46

you cannot ust the 4cy wire harness or ecm , the PIN outs are wrong, you need the proper year harness for your year

uvastang

yea i understand that much.. i swapped over everything from the gt... engine trans rearend exhaust brake lines computer and harness... but the harness doesnt connect exactly to my car because its speed density and made for the 87 and my 93 is mass air... but i have found some harnesses on ebay for around 100 dollars or so and was wondering if i just need that or if i also need to get a mass air computer with it or if my computer i have with the 87 gt that had speed density will be ok or not??? ive been swapping everything since before christmas and its just not running so im really anxious on gettin it fixed... this is the last thing i need to do besides changing fluids...

suprakilla1425

Pretty sure you still need to get a ECU from an 89-93 5.0. The 87 ECU won't work unless it's a remanufactured ECU and flash programmed with the AL9 or the automatic equivalent coded A9P.

uvastang

ok thanks.. cause i can find the harness and computer on ebay but its a couple hundred dollars where as just the harness is about 100 ... but i was pretty sure i would need the ecu also since one is mass air and the other is speed density.. and also the fact that my 93 has air bags and crash sensors and the 87 did not..

Venomantidote95

You can get an ecu from the parts store for about 100$ you have to have a mass air ecm!

mjr46

did you swap out the interior/dash/air bag stuff over to the 87 ??? even though it is a lot of work often swapping over the dash harness will make sure all works , I've know a few people that did such and a few who worked around it.

Dj_Seph

At least you're getting around to do this. I have everything to do the mass air but am stuck...Really need to have someone come by and show me how it's done. D: