How to: wire your stock pump for return fuel, the easy way - Page 2 - Focus Fanatics
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Old 05-05-2013, 08:00 PM   #11
disciplerocks
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Yes but I was trying to help others who could use the info.
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Old 05-05-2013, 11:40 PM   #12
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Quote:
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This.

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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Old 05-06-2013, 07:39 AM   #13
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That makes sense. Thanks.
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Old 05-06-2013, 08:41 AM   #14
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so does that mean the relay is switching on the power side? I'm just trying to figure out what you meant. I know how they work, I just want to make sure I understood you correctly. Maybe I'm just not thinking straight right now.

switched power to the relay coil, and to ground. Heavy gauge wire (on a fused circuit) from the battery to the switched side of the relay. The other side of the relay goes to the pump positive, and the pump ground is a heavy gauge wire just straight to ground?
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Old 05-06-2013, 08:58 AM   #15
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The power is switched, but the ecu controlled the ground.
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Old 05-06-2013, 09:18 AM   #16
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on the stock system. Right. but are we trying to switch power or ground on the pump? not sure why we need heavy ground wiring.
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Old 05-06-2013, 04:11 PM   #17
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tis a confusing thing to do
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Old 05-06-2013, 07:01 PM   #18
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This isnt to use the stock pump driver or the ECU once you go to a large wire , relay and return fuel system

Tom
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Old 08-01-2013, 08:40 AM   #19
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Quote:
Originally Posted by 1turbofocus View Post
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

Tom
Please tell me more tom. my friend did a surge rank on his 1986 toyota corolla gts.............
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Old 08-01-2013, 09:44 AM   #20
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What would you like to know ?

Tom
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