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  #1  
Old 10-05-2009, 07:35 PM
valsound valsound is offline
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Default What's the worst that could happen? (86-88 ECU swap)

I have a farm beater 1986 Ranger with a 2.9 4x4 manual.
It has been having intermittant issues that lead me to believe the computer is shot.
When I bought the truck, the previous owner handed me a box of parts saying "you might need these some day"
Included is a computer from a 1988 (also manual according to the junkyard paint)
I realize there might be small differences, but if I try a swap, will it work?
What's the risk?
Thanks for your conjecture.
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  #2  
Old 10-05-2009, 07:42 PM
STL STL is offline
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If it is not the right computer the truck simply wont run so no harm

for it to work properly it will have to be a 2.9 4x4 manual computer
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  #3  
Old 10-05-2009, 07:46 PM
STL STL is offline
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Easy way to tell match the numbers up if thee sticker are present

Here are a list of possible computers for a 86 the ID numbers and letters are what u match up below this are the ones for the 88

1986
Ignition Cont, 4-122 (2.0L)
Ignition Cont, 4-140 (2.3L)
Elec Cont Unit (ECU), 4-140 (2.3L), MT, Calif
Elec Cont Unit (ECU), 4-140 (2.3L), MT, Fed
Elec Cont Unit (ECU), 6-179 (2.9L), Calif, AT
Elec Cont Unit (ECU), 6-179 (2.9L), Calif, MT
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, cab and chassis
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x4
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, MT, pickup
Elec Cont Unit (ECU), 4-140 (2.3L), AT
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, pickup
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, MT, cab and chassis
Elec Cont Unit (ECU), 4-122 (2.0L)
Ignition Cont, 6-179 (2.9L)

1988
Elec Cont Unit (ECU), 4-140 (2.3L), AT
Ignition Cont
Elec Cont Unit (ECU), 6-179 (2.9L), Calif, MT, 4x2
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-M1A
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-M2A
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-MA
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, MT
Elec Cont Unit (ECU), 6-179 (2.9L), Calif, MT, 4x4
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-S1A
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-S1C
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-S2A
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-S2C
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-SA
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x2, ID E8TF-SC
Elec Cont Unit (ECU), 6-179 (2.9L), Calif, AT
Elec Cont Unit (ECU), 6-179 (2.9L), Fed, AT, 4x4
Elec Cont Unit (ECU), 4-140 (2.3L), MT, Super Cab
Elec Cont Unit (ECU), 4-140 (2.3L), MT, Reg Cab
Elec Cont Unit (ECU), 4-122 (2.0L), ID E87F-9L513-AA
Elec Cont Unit (ECU), 4-122 (2.0L), ID E87F-9L513-BA
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  #4  
Old 10-06-2009, 06:31 PM
valsound valsound is offline
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Thanks STL,
I swaped out the computer today (put the 88 Bronco computer in my 86 Ranger 2.9)
Started right up So far so good.
Only difference I noticed was the idle seemed a bit high. Not a huge amount, just enough that i kept waiting for it to drop back down but it never did.
Now I'll just wait & see if the intermittant problem shows up or is gone.
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