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Fuel pump re-wire kit

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Blitzeclips

15+ Year Contributor
1,571
6
Aug 5, 2004
Bear, Delaware
Advantages? Purposes? Anyone done this? I see alot of member on 2gnt and here that have this done. I want to know why and what it does. If anyone can give me some insight that'd be great. TIA. :thumb:
 
It maintains power to your fuel pump even if you have all your other electronics blasting. It helps to make sure you don't run lean. I have yet to do the rewire, and if I have my stereo on, wipers on, highbeams on, I can hear the tone of my fuel pump change whenever my turning signal blinks.
 
Oh okay. So it basically keep the voltage consistent where it may fall off due to other electronic units?
 
It helps stabilize the current... the voltage is always constant (~+12V). The stock wires are full of breaks and connectors that add resistance. Not to mention it shares a voltage source with other components.

We'll have to dig around the fuel pump wires when we install MS, so we can do the rewire then.
 
VelocitàPaola said:
It helps stabilize the current... the voltage is always constant (~+12V). The stock wires are full of breaks and connectors that add resistance. Not to mention it shares a voltage source with other components.

We'll have to dig around the fuel pump wires when we install MS, so we can do the rewire then.

Sounds good to me. Speaking of the MS, I just ordered my UEGO o2 today. :D :D
So if you want, I can show you how to navigate everything featured once you install it , or get it at that(assuming sometime around MSnS upgrade)... Although I'm sure you know already..
Will be installing once I get it, because I also made an appointment to have my car dynoed, and tuning the cam gears on the Thursday 2 weeks from now, so I figured it'd come in handy anyways..

Then I shall begin my investment of the MSnS.. :thumb:
Can't wait Paul.
 
Voltage is not always constant.

As amperage demand increases voltage will fall off and drop, This is consistant with A/C and D/C. Think of the power in your car as a water pipe. The water pipe has X amount of pressure which represents the amerage capability. The size of the pipe represents the voltage. The more you tap into the pipe for water the less pressure your going to have at the end due to the demand of all the taps. Make sense? Been a long time since i have had to explain electricity as a water pipe.

Now is a resistive circuit voltage will also vary depending on the size of the resistors. Voltage will drop over each resistor in series.

If you think you have that mastered and it interests you, read about A/C current and the reactive properties it posseses. Jst some interesting reading. ( I work for the power company these days so voltage is my daily grind)
 
Talon ESI-T said:
Voltage is not always constant.

As amperage demand increases voltage will fall off and drop, This is consistant with A/C and D/C. Think of the power in your car as a water pipe. The water pipe has X amount of pressure which represents the amerage capability. The size of the pipe represents the voltage. The more you tap into the pipe for water the less pressure your going to have at the end due to the demand of all the taps. Make sense? Been a long time since i have had to explain electricity as a water pipe.

Now is a resistive circuit voltage will also vary depending on the size of the resistors. Voltage will drop over each resistor in series.

If you think you have that mastered and it interests you, read about A/C current and the reactive properties it posseses. Jst some interesting reading. ( I work for the power company these days so voltage is my daily grind)

I think you got that a little mixed up. Voltage is like the water pressure, current is like the flow rate, and resistance is like the pipe diameter.

The voltage will only decrease is the amperage demand exceeds the supply. Obviously, Ohm's law ties amperage, voltage and resistance together, but basically, you'll notice a voltage drop at the pump because the thing is trying to pull too many amps through small, broken up, resistive wires.

That's all I meant... I'm a self-proclaimed "amateur EE." :p

Ideally, the voltage output at the batter/alternator is always +12V, but it does fluctuate, like you said, mostly because of the charging system. Higher voltages charge the battery quicker (up to a point).
 
Ugh, your right paul, i did get that mixed up pretty good.

Long story short guys, the wiring for the pump is way to small for the length it is run through the car.

Terry
 
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