Fuel Pump Re-wire Necessary? Testing Video Inside
#1
Fuel Pump Re-wire Necessary? Testing Video Inside
Before I install the walbro fuel pump I wanted to test how much voltage drops to the stock fuel pump and if a re-wire was necessary. So, I made a little video of how I did it and wanted to share the results with you all.
In short, there was about a 0.5 V drop across the harness. This was at a light electrical load with no lights on, no radio, no ac/heater/fan, etc. I may do another test later to see how much voltage drops with all these systems on.
In short, there was about a 0.5 V drop across the harness. This was at a light electrical load with no lights on, no radio, no ac/heater/fan, etc. I may do another test later to see how much voltage drops with all these systems on.
#3
That's my point exactly. With a light electrical load on the car, I already saw a drop of roughly 0.5 Volts in the old wiring harness from what it should have been. I just wanted to show some actual numbers because a lot of people say you should re-wire the fuel pump, but don't provide any numbers as to why. This voltage drop is the reason why.
#5
Senior Member
I ran a new + wire to the fuel pump, just in case, didnt really measure the voltage before or after, but while working with all the wiring in the car, basically all my body wires are quite bad, not enough current to properly move windows/sunroof and so on. Corroded inside.
#6
I ran a new + wire to the fuel pump, just in case, didnt really measure the voltage before or after, but while working with all the wiring in the car, basically all my body wires are quite bad, not enough current to properly move windows/sunroof and so on. Corroded inside.