ECU

D.Piper

Member
Jul 17, 2020
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Pleasant Hill, IL
Swapping my 87 for a 91 5.0 drivetrain. The swap is complete besides the wiring. Anyone know where I can find an ECU and once I get one, where do I send it to get it flashed and reprogrammed?
 
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7991LXnSHO

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Sep 1, 2010
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Is the engine stock or what mods have been done? The stock computer, in MAF configuration, (A9L for manual transmissions) can compensate for more modifications than newer computers. I’d search for the MAF conversion threads here.
 

7991LXnSHO

Now I want a 10 year badge
10 Year Member
Sep 1, 2010
3,764
906
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Kearney, NE
Then you can use the 87 harness with a MAF conversion, including the extra harness, MAF and the A9L or A9M like @5.0Droptop has posted above.
Edited for poor typing.
 
Last edited:

D.Piper

Member
Jul 17, 2020
24
3
13
23
Pleasant Hill, IL
So at this point I’ve gotten myself in a situation. I thought I would just need the ECU from an 87 5.0 since my car is an 87 4 cyl but I’m swapping to a 91 GT drivetrain. I bought the car from a guy who has done the entire swap but never finished the wiring. So I ordered a ECU for a 87 5.0 online for 130 dollars but the engine that’s been swapped in already has MAF. So now I’m wondering if I’m out the 130 dollars or if I could switch the MAF to speed density and what would be the easiest way to go.