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v8-7 · 07-15-2006, 09:11 PM

Hi guys,
I just installed a 91 5.0 and all engine controls into a non-ford car
( an Rx-7 ) .
This is going to be a smog-legal project, so i have to get it right.

The car is running and I got the check engine light working but the fuel pump error code 87 comes up and keeps the cel light on, so I have to clear that.

(code 87 (oc): FP relay circuit failure- suspect inertia switch, fusible
link, FP relay. )

I did not use the ford relay when wiring up the rx-7, I used the stock Mazda set-up.

I'm getting strange reading of 6-7 volts on pin 19 of the ecu even though the wire is cut
.

I think I may get rid of the code by applying 12v to pin 19, but thought I'd run this by you first, as I don't want to blow up the ecu .

Here is a copy of the schematic :

http://pg.photos.yahoo.com/ph/sgcpa1...?.dir=/c324scd

Sorry for the lack of detail on the picture, I can e-mail a better diagram to you if your interested .

Thanks for any help.

07-15-2006, 09:11 PM	#1
v8-7 Registered Member Join Date: Jul 2006 Posts: 13	Code 87 Problem Hi guys, I just installed a 91 5.0 and all engine controls into a non-ford car ( an Rx-7 ) . This is going to be a smog-legal project, so i have to get it right. The car is running and I got the check engine light working but the fuel pump error code 87 comes up and keeps the cel light on, so I have to clear that. (code 87 (oc): FP relay circuit failure- suspect inertia switch, fusible link, FP relay. ) I did not use the ford relay when wiring up the rx-7, I used the stock Mazda set-up. I'm getting strange reading of 6-7 volts on pin 19 of the ecu even though the wire is cut . I think I may get rid of the code by applying 12v to pin 19, but thought I'd run this by you first, as I don't want to blow up the ecu . Here is a copy of the schematic : http://pg.photos.yahoo.com/ph/sgcpa1...?.dir=/c324scd Sorry for the lack of detail on the picture, I can e-mail a better diagram to you if your interested . Thanks for any help.