This is topic 1990 5.0L F-150 engine swap into an 88 gt in forum Tech Talk at Northern California Ford Owners  .


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Posted by Thgzfrlife (Member # 11118) on :
 
Hello ladies and gentlemen, this is my first post here on these forums and I wish it were under better circumstances. I recently bought a 302 5.0 that was bored out to 331. It has gt40 heads, comp cam, and flat head pistons. The problem is, the gentleman I bought it from told me it was out of a truck; a 1990 f-150. Because of this, it has the truck wiring harness and I am unsure if it is useable on my mustang especially considering that it is maf. My 88 gt is speed density.

Will a truck engine harness work with the existing wiring harness that is coming through the firewall already or do I have to obtain a mustang specific engine harness?

Does the harness have to be for the year of the computer, or can it be any old harness that is mass air? ~The current computer is an 87 apparently (dont know how/why) with the code DA9 and from what I have read through on another forum, I cannot use it for this new engine I wish to put in.~

The engine was attached to an automatic transmission, so will I need a pilot bearing for the manual transmission switch? Also, how shall I get this drive shaft to pull the motor and transmission? My nissan 240sx u-joint was very different; I am new to mustangs, and I apologize for my lack of knowledge.

What if any parts need to be swapped from the 1990 powerplant in order to fit and work in my fox? Some concerns i was thinking about were oilpan, manifolds etc..

Any help and advice is greatly appreciated.

Apologies for the amount of text.
 
Posted by JohnB (Member # 969) on :
 
Welcome to the Board. [Smile]

Before we get too far into the post, is the cam a H.O. (high output, 5.0 firing order) or a Non-H.O. firing order?
 
Posted by Thgzfrlife (Member # 11118) on :
 
he says it is a non h.o., however i am going to test it at first opportunity when i get off of work today.

Edit:
On second thought, it was in a truck and running when I bought it, and the computer he was using was for a mustang. The code on the eec was C3W1 which I believe is for the 89-93 auto mustangs. I wasnt hearing any discrepancies with the firing order while the engine was running. He did say however, that the C3W1 was for non AOD so it would work for a 5spd manual mustang as well; however I myself dont want to take that at face value and would rather get some information before I do something bad.

[ July 22, 2011, 01:41 PM: Message edited by: Thgzfrlife ]
 
Posted by Duncan Motors (Member # 7045) on :
 
google th eecm number. but the firing order will tell all.if its a non roller motor, throw it a away.
 
Posted by Musttanguy (Member # 2251) on :
 
The C3W1 is a MAF Mustang automatic computer which is typically installed in 1993

Need to find out if H.O. Cam installed or they may have swapped injector wiring around to compensate.
 
Posted by Thgzfrlife (Member # 11118) on :
 
will i be able to use the C3W1 computer even though I have a manual transmission or will I run into issues? On my old 240sx it was recommended to use the automatic computer for the sr20det because cold starts were a lot easier.
 




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