I'm pretty much done with my project, It's an LS-Vtec in a 89 Civ 4-door. I've been getting conflicting reports on the wiring harness I need. Being that it's dual point fuel injection, I need a wiring harness from a Crx or Hatchback Si. Or can I modify my stock harness? Any help will be much appreciated.

 

what ECU are you trying to run?

DPFI->MPFI conversions arent' that bad. Look at the wire colors on a MPFI car. There are four wires with each a different color, corresponding to inj1, inj2, inj3, inj4. And a shared 12v source (yel/blk I think).

So, your inj1 and inj2 are already wired. You need 2 wires to the ECU (inj3 and inj4). And then 2 wires to the shared 12v rail, at the resistor box...

Do take special consideration, to make sure that the proper injector number is going to proper cylinder...

What ECU?

-PHiZ

 

Thanks man......It's a pr4 ecu.:thumbup:

 

hehe, of course it would be that one. I only say that because there are OBD0 and OBD1 PR4's hehe. Neither of them will activate vtec, so how are you addressing that?

Which PR4, OBD0 or OBD1?
http://hondata.com/techecuid.html

-PHiZ