Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - How to: wire your stock pump for return fuel, the easy way
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Old 05-05-2013, 11:40 PM   #12
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Originally Posted by disciplerocks View Post

And how would you wire a return system with the Focus ECU? I am interested to know. If you are keeping the stock power supply, then how would that not prevent a spike?
Easy , a return fuel system you would run a wire to a relay from the switch, the relay would have a HEAVY gauge wire from the Batt to the relay then to the pump and a HEAVY ground wire to the pump

Then you would trick the fuel rail psi regulator to read 45psi , I will go into that another time because I dont tell everything on here and it doesnt seem others have caught on to this yet , makes a tuners life easier and safer on the engine for sure

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