91 civic dx wiring issues

[mkerley]

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.

 

[AHHVTEC]

you will need a si or hf motor harness or convert yours to mpfi

 

[fixed4 life]

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.

MPFI Swap

 

[AHHVTEC]

the hf and si are already mpfi

 

[mkerley]

i have the si harness, but the body plugs will not match up.