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post #1 of 3 (permalink) Old 03-19-2012, 09:39 AM Thread Starter
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Question Engine, check....computer, (place giant star next to)

So this last week I found a SC moter and 5 speed on craigslist I just had to buy. Its complete intercooler to starter to yoke. The only problem is the guy who I bought it went cut happy, cut driveshaft, wire harness, throttle cable....... The 5 speed I plan on putting in my Tbird, and the engine I have been THINKING about putting it in my d.d. F150.

My question is about the engine wire harness and computer. The moter is from a 1990. Do I have to use a 1990 computer and harness or would other years (say 94-96) computer and harness work also?

Thanks in advance

1983 F250 4x4 Diesel (summer daily driver), 1986 F150 4x4 strait 6 (plow truck)
1998 Lincoln Mark Viii LSC (Daily driver), 1995 Ford Thunderbird (Project)
1995 Ford Thunderbird 4.6 5 speed (sold), 1997 Lincoln Mark Viii (parts car)
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post #2 of 3 (permalink) Old 03-19-2012, 01:46 PM
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.. more than one way to do this swap.

If you want to use a stock EEC, you need a similar EEC ( with or without EGR depends on your application ), I would stick with a 90 PCM. The 94/95 SC have the automatic trans function so you would need a 5 speed PCM, and then they are wired slightly different, they have a DIS module part of the PCM harness, and the 89-93 have the DIS mounted on the Engine harness. Plus you would need to use the 36# Injectors and the later model timing cover / harmonic balancer.

The 3.8 NA PCM will not run the engine correctly without a Tune. THe 89-93 and some 94/95 Federal emissions are made for a distributor whereas the SC uses a Distributorless Ignition system, the 94/95 are built to control the Electronic transmission and the 96/97 have OBD2 functionality so you would need to have it wired up for the OBD2 setup, and then re-flash the PCM to get the SC tune and transmission delete. You could use any PCM if you are going to re-flash it or get a chip, but without that you are limited to using the stock SC PCM.

I would stick with the early model harness and stock PCM, but you could definately make it work with a different harness and PCM if you have everything wired correctly and a tune.
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post #3 of 3 (permalink) Old 03-21-2012, 01:30 AM Thread Starter
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ok....thanks for the info.......i think I look for the '90 parts then, other wise i'll end up selling the moter if I dont find the parts by the middle of june so I can have more funds for the Tbird when I start redoing it

1983 F250 4x4 Diesel (summer daily driver), 1986 F150 4x4 strait 6 (plow truck)
1998 Lincoln Mark Viii LSC (Daily driver), 1995 Ford Thunderbird (Project)
1995 Ford Thunderbird 4.6 5 speed (sold), 1997 Lincoln Mark Viii (parts car)
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