Can you run a fuel pump direct to battery?
Can you run a fuel pump direct to battery?
Yes, they both go to the positive side of the battery.
How to connect fuel pump to fuel pump?
Cut the black/yellow (POSTIVE) wire into two. Connect the side of the black/yellow wire that comes from the ECU to PIN85 of the Relay using a female spade connector. Connect the other side of the black/yellow wire that leads to the fuel pump to PIN87 of the Relay with another female spade connector.
Why do I need to rewire my fuel pump?
When putting in an aftermarket fuel pumpor looking to get more fuel out of your factory pump, one mod worth doing is re-wiring that fuel pump. The purpose of this is to make sure that the fuel pump is getting a good, clean voltage that won’t fluctuate or change based on other electrical conditions the car is going through.
How much power does an aftermarket fuel pump need?
This is not ideal when you are running an aftermarket fuel pump rated at 250L/hour + which requires around 13.5v or even up to 14.5v of power to run at its optimal efficiency. You can use this setup even if you just want to make your current pump more efficient and add a couple of ponies at a low cost.
How big of a relay do you need for a fuel pump?
Choosing a Relay. The relay you need should be a four-prong relay with at least 14-gauge wiring. You do not want to get a relay that cannot handle the amperage that your fuel pump might pull causing the relay to fail, and you to be stranded on the side of the road.
How do you re-wire a fuel pump?
The steps of re-wiring your fuel pump are to first get to your fuel pumps wiring. At the wiring you need to find the 12v supply wire from the ECU to the fuel pump. Once that wire has been found cut that wire so that you now have half of that wiring running to the fuel pump, and the other half running to the factory ECU.
How is a fuel pump connected to a relay?
4. Run a wire from pin 87 to your factory wire that you cut that runs to the fuel pump. Now to explain what you just did. The relay is just like a light switch. Anytime it receives 12 volts on pin 85, it will turn on the switch and make continuity between pin 86 and pin 87 on the relay.
This is not ideal when you are running an aftermarket fuel pump rated at 250L/hour + which requires around 13.5v or even up to 14.5v of power to run at its optimal efficiency. You can use this setup even if you just want to make your current pump more efficient and add a couple of ponies at a low cost.
Why do I need to wire my fuel pump off the battery?
Motors running right on the edge of tuning could go slightly lean enough to start detonationin the motor and cause a total failure. The best way to avoid this is to wire the fuel pump to have a dedicated voltage line right off the battery so that it consistently performs. How to start Re-wiring your fuel pump
