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Old 07-15-2006, 09:11 PM   #1
v8-7
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Join Date: Jul 2006
Posts: 13
Default 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.
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Old 07-16-2006, 06:45 PM   #2
Hozer 88GTConv
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Location: Jacksonville, FL
Posts: 706
Default Re: Code 87 Problem

Tell me what wire color it is and I'll go put my meter on it...pin 19 on the ecu...I'll check the voltage for ya.
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Old 07-16-2006, 07:38 PM   #3
v8-7
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Default Re: Code 87 Problem

Thanks,

It's dark green and yellow.

You can also catch that wire at c213 the green connector next to the ecu

here is a url that wil work better

http://webpages.charter.net/kgoldste.../fuelpump4.jpg

Last edited by v8-7; 07-16-2006 at 11:11 PM..
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