how to wire a double pumper to run all the time?

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Mar 3, 2011, 08:24 AM

#16

JohnBradley

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Why are you wiring it to run all the time? Its going to cause some low rpm issues without an AFPR. I do not recommend doing it.

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Mar 3, 2011, 08:29 AM

#17

Fast_Freddie

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I would not recommend it either... I tried it for about 30 seconds when i built my double pumper, it was a no-go for me, so I am running a hobbs switch now... only reason for the schematic was for those that choose to do it... Even with one pump rewired to take out the step down relay, it will bump the fuel pressure up to 54 psi at idle... did on my car...

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Mar 3, 2011, 08:33 AM

#18

JohnBradley

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Even if the base overrun isnt an issue the sudden acceleration at 3,000rpm and under range (when the car switches to high voltage to the pump) can end up not working at all. I am talking 90psi spike and a dead lean misfire.

Aaron

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