Ryanjave Posted July 29, 2020 Share Posted July 29, 2020 Will a 1994 ecm plug in and run a 1994 351 using a 1986 f150 5.0 efi engine wiring harness need help Link to comment Share on other sites More sharing options...
85lebaront2 Posted July 29, 2020 Share Posted July 29, 2020 Not well, there were a number of changes between 1986 and 1987 in the actual engine controls. EGR being one of them. Go here and look at the ECM pinouts: http://www.garysgaragemahal.com/electronic-engine-control-eec.html Link to comment Share on other sites More sharing options...
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