Author Topic: Power to electric fuel pump  (Read 1734 times)

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Offline Darylle

  • Two Barrel
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Power to electric fuel pump
« on: September 20, 2017, 08:40:44 AM »
Hi everyone
What is the best + source for an electric fuel pump, can I use the alt wire? 

Offline sirfixalot

  • Fuel Injected
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  • Location: Gods Country Sutherland S
Re: Power to electric fuel pump
« Reply #1 on: September 20, 2017, 09:11:26 AM »
Electric fuel pump feed has to be switched thru ignition should also cut off if engine stops ie in an accident usually uses a signal pulse from Tacho or an input from an oil pressure sensor on engine

Offline Vettech

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Re: Power to electric fuel pump
« Reply #2 on: September 20, 2017, 12:14:59 PM »
In C4's the +ve is supplied from ign switch in crank position only, when engine fires/runs the +ve is supplied from the "Oil Pressure switch". This ensures if oil pressure lost or engine stops, fuel is immediately stopped. As Sirfixalot says.
Vettech.