I have a 90 Civic hatchback DX and I'm going to swap in a P28 ecu. I'm going to replace the O2 sensor and distributor to an OBD1 type on my LS/VTEC. I have the OBD0-OBD1 ecu jumper harness coming, so what engine harness do I need to finish the swap? A big thanks in advance .

 

you should use the 90 dx harness. Add wires for the dizzy, knock sensor and vtec. Also do a dpfi to mpfi conversion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">you should use the 90 dx harness. Add wires for the dizzy, knock sensor and vtec. Also do a dpfi to mpfi conversion.</TD></TR></TABLE>

...and don't forget the 4 wire O2 sensor as well.

Like he said, the car needs to be wired for mpfi for the conversion harness to have a positive effect. Thats how the conversion harness works MPFI OBD0 -&gt; OBD1.

 

Is there a website you can refer me to so I can read up on how to do the mpfi conversion?

 

search the forum and you'll get loads of instructions on how to do it.

 

http://www.fourthgenhatch.com/mpfi.html
theres a good write up on it with pics.

Do this dpfi-mpfi swap first, then buy a 0bd0-obd1 harness, then add those wires. Boomslang has conversion harnesses and great guy to help you if you have any questions.