So I'm doing a dpfi to mpfi swap on my 91 civic hatch that had a d15b1. At the ecu my wires do not match to anything I have found on any site or maual. The a1 wire is yellow, not brown. No light blue wire for the 3rd injector. The motor starts but runs on only cylinder 1. Any help is appreciated. If there is anyone in the south east Wisconsin area (Milwaukee) that could come by and check it out that would b even better. Please help me out guys and gals

 

If you'll search the FAQ here: https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/88-91-crx-ef-civic-frequently-asked-questions-faqs-1508680/ ,you'll find this: http://www.angelfire.com/d20/hcivic88/dx-siwiring.html And Google works also...

 

That was the same write up that I used. I searched everything in the FAQ section and I've been googling for the past week and still nothing that matches to my ecu wiring. A1 is yellow with silver dots same with a3. A5 is red with silver dots and so is a7. I've double even triple check all my soldered connections and they are all good. Damn Honda and there dpfi systems!

 

http://www.angelfire.com/d20/hcivic88/dx-siwiring.html

 

use this one. i have used it on several vehicles with zero issues. the wires for a1 and a5 are injectors one and three i believe. are you trying to use a si harness on a dx/std body harness?

 

I'm using my dx harness on the motor and under the dash as well. I have it wired exactly how the write up says and I got nothing

 

Bump

 

Bump

 

this one may help http://www.texasracers.net/articles/dpfi-mpfi/