When I bought my B18C1 (OBD 1) it came out of a '94 Si HB and its engine harness was burnt... I am swapping it into my '90 Std HB and I decided that I am not going to use my DPFI harness... what are some other harnesses that are one piece and reach all the way to my ECU?

 

Use the DPFI harness and modify it for MPFI and Vtec.

 

But will it not hook up to my P28 ECU?

 

As stated, you will need to convert your Dual Point harness to a Multi Point. Once complete you can make or purchase one of the many obd0 to obd1 conversion harnesses for you ecu. The goal is to use the original harness and modify it with the additional plugs for the new motor. There is no oem harness that is plug and play with this combo. There are after market companies that make a full plug and play harness as well.

-BJF

 

You will need an OBD-0 to OBD-1 conversion harness. You need that anyway. The ECU plugs into the DASH harness, then wires run into the engine bay where they connect to the ENGINE harness.

Keep your stock dash harness.
Use obd0 to obd1 conversion harness.
Modify stock DPFI harness for MPFI.
Add Vtec wiring (usually comes straight off of the conversion harness).