I have a 90 Civic hatch DX and the motor is a LS/VTEC. The head is a PR3 and the block is a B18a. My distributor is a JDM OBD1 and the ecu is a P28. What engine harness do I need the get the motor running? BTW, I don't have the stock DX harness to modify.

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 85mm LS VTEC &raquo;</TD></TR><TR><TD CLASS="quote">I have a 90 Civic hatch DX and the motor is a LS/VTEC. The head is a PR3 and the block is a B18a. My distributor is a JDM OBD1 and the ecu is a P28. What engine harness do I need the get the motor running? BTW, I don't have the stock DX harness to modify. </TD></TR></TABLE>

well, if you haven't done so already, you need to convert your DPFi DX to MPFi (Si) and you can reuse your DX engine harness once it's been modified to MFPi (Si) spec and use it on your LS/VTEC engine, then use OBD1 injector, dizzy, and add an OBD1 4-wire 02 sensor and you should be set.

 

Once I switch it over to MPFI at the ecu, can I use a Si engine harness instead of modifying the Dx harness?

 

The Si harness won't plug up to the DX harness at the shock towers.

 

Then how do I add the extra injector plugs and other plugs to the DX harness to wire everything up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 85mm LS VTEC &raquo;</TD></TR><TR><TD CLASS="quote">Then how do I add the extra injector plugs and other plugs to the DX harness to wire everything up?</TD></TR></TABLE>

you just add them from the ecu plug/ecu pinouts, feed them through the firewall out to the respective sensor plug.