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89-94 EFI systems the same?

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Old Jun 4, 2016 | 11:04 AM
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From: nunya
89-94 EFI systems the same?
I am getting ready to pull the 5.8/c6 out of my 89 F250 to put a diesel in it's place....I also have a 94 F250LD with a 5.8/E4OD and the trans is acting up.
What my questions are....are the computers interchangeable? What will happen if I use the 94 computer and put the C6 in the truck?
Thanks
 
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Old Jun 4, 2016 | 02:49 PM
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Originally Posted by lance65
I am getting ready to pull the 5.8/c6 out of my 89 F250 to put a diesel in it's place....I also have a 94 F250LD with a 5.8/E4OD and the trans is acting up.
What my questions are....are the computers interchangeable? What will happen if I use the 94 computer and put the C6 in the truck?
Thanks
The PCM isn't going to like not being able to shift the transmission.
 
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Old Jun 4, 2016 | 03:25 PM
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If you install the C6 use the '89 computer, pinouts are the same minus all the pins that go to the E4OD trans.
 
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Old Jun 4, 2016 | 07:22 PM
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From: nunya
So, do I need to remove the pins for the E4OD from the 'puter harness?
BTW..THANKS!
 
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Old Jun 4, 2016 | 08:04 PM
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No.. the computer will just ignore them.
 
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Old Jun 4, 2016 | 08:45 PM
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From: nunya
THANK YOU!!!!!
 
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Old Jun 4, 2016 | 08:56 PM
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Is the C6 vacuum operated?
 
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Old Jun 5, 2016 | 12:34 AM
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yes..............
 
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