im putting a 89 si single cam motor into a 91 dx. the plugs on the si harness will not match up. what do i need to do? i was going to use the plugs off of the si body harness but i cant find the wiring any where.
You need to do a MPFI conversion. You need to modify your stock harness using a 88-91 Si (or Hf) harness then you need to splice and move some wires on the ecu plugs under your passenger carpet. This website will give you directions on how to do that.
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