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Wiring a 'prime' button to the EFI relay without nuking the ECU

uid 46171's pic
posted by  kittysgreyvolvo on  Fri Dec 22 12:41 CST 2023
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last visit: Sat Oct 18 15:23 CST 2014
[RELATED]

On the + from the ECU to the white fuel injection relay, you may be able to splice in (fused) current source and a diode so + current through your priming switch does not cause exposure to the ECU pin.

Do you have the back flow stop on the main fuel pump out so the fuel system remains primed with fuel yet maybe not pressured at 35 ? PSI after some hours as fuel drain back through the fuel rail pressure regulator also.

Brickpix is out so I can upload an drawing of a circuit you want. See if I can find one and link.

Sort of a similar thing thatg some do to use the rear red fog light position as an esxtra brake light, yet preserves the fog light function? I forget now. Sorry.

Eggnog Guy with moar eggnog by the bucket.
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