Ok so I keep blowing my main relay. Luckily I have 5 from the junkyard, but like every week my car will just shut off and then the main relay wont click and the fuel pump wont come on.
I believe its due to my wiring, it was fine before I swaped my whole harness for a 1988 crx si. I have a 1989 crx dx and the wire on my fuel pump have 4 wires and the 88 si harness only has 3. I think its a yellow, black, black grey with 2 strips. and then my fuel pump has an extra black/grey. I know its a weird problem any suggestions would be appreciated.

 

Go back to your 1989 CRX DX harness and do it the right way. I have always heard the 88 and 89 were different. Why did you change the harness that far back?

 

I went with the whole engine and cabin harness to run mpfi and everything else works except that plug n its only one wire different.

 

Bump I really need some ideas to make this work.

 

Look up the electrical schematics for both the 89 dx fuel pump and see what they do and where it goes then look up the 88 si one and see what they do and where they go. one may be an extra gound your not using just guessing without looking at them start there