Powering Fuel Pump From Amp? *PIC ADDED*

[JSchleim18]

Hey would there be any drawbacks to powering the Fuel Pump rewire by using a distribution block from my amps...my power wire is too short to reach the front of the car and I already have a block in place...would there be less draw to the fuel pump or what? Thanks

 

[Terry Posten]

You need to provide us with:

Gauge and length of wire
Fuse size at battery
Amp size and draw

 

[grocery_getter]

Make sure you have enough AMP reserve in the wire leading to the distribution block and that it is sized and fused properly so when the bass hit and your amp draw extra current, your fuel pump wont be starved of current.

 

[JSchleim18]

Gauge & Length - 10AWG & would be approx. a foot and a half from relay to block
Fuse Size - 25 amp
Amp Size - 300W & 150W JL Audio

 

[Polish]

What is going from the battery to the block? If only 10 gauge then no dice. For those 2 amps and the fuel pump I'd do a 4 gauge main feed. Then 8 or 10 gauge from the block to the amps/pump. The main fuse will need to be 60-80 amps.

 

[Terry Posten]

How long is the feed wire from the battery to the power block?

 

[JSchleim18]

OK here we go...from the battery i have: 250 amp big ass fuse with 4 Gauge High Current Power wire all the way to the dist. block and then off the block i have 8 Gauge Wire going to the amps

 

[JSchleim18]

Quote:
How long is the feed wire from the battery to the power block?



I can't tell exactly how many feet but maybe 10-11...the battery was relocated to the intake and the dist. block is screwed to the back seats below the little opening (this is looking at it from the trunk)...the power wire runs on the driver side

 

[grocery_getter]

What we are all worrying about is if you have enough of a wire size and fuse on the wire leading to the distribution block. That last 1.5 foot from the distribution block to the fuel pump isn't going to be as critical as the main supply to the distribution block with 450W worth of amp already on it.

 

[JSchleim18]

OK sorry about that...i think i clarified everything else up in the last 2 posts

 

[Polish]

Ok, you are fine then. 4g is good.

 

[JSchleim18]

aight thanks for the help...so i should have ZERO worries letting her go through the dist. block! Great!

 

[Terry Posten]

Run a 10GA wire from the pump housing plate to a frame point (clean all gounding points and then protect). Just because you have 10GA for power does not mean that the pump is gounded good enough stock.

 

[JSchleim18]

no the ground is 10GA IIRC...i ran it from the relay and did everything as per VFAQ

 

Yes but that's the relay ground; it's not connected to the fuel pump. He's talking about grounding the fuel pump as well, so you're upgrading both the hot and cold sides (relative to the pump) of the circuit for optimal flow. Which is a good idea btw; I'm going to go ground my fuel pump this afternoon. Thanks for the tip.

 

[JSchleim18]

Ohh aight I got you now!...I shall do that tomorrow...Thanks

 

[iceman69510]

I had a grounding issue following my rewire, new fuel pump and reconnecting a wire that broke off the fuel pump housing. I added a second ground to make sure it was good and stable. Good advice to make sure the ground is good, because otherwise it can shut down the fuel system.

 

[JSchleim18]

Quoting Terry Posten:
Run a 10GA wire from the pump housing plate to a frame point (clean all gounding points and then protect). Just because you have 10GA for power does not mean that the pump is gounded good enough stock.



Bringing this thread back up...would I be able to get away with grounding this wire from the housing plate to the bolt that the rear bumper bolts to (that big ass bolt coupled with another one for the bumper support)??? Thanks

 

[curtis]

I'll also add its always good when moving the battery to the trunk to run a separate ground all the way to the front into a distribution block. I've seen cars do some werid stuff without it. Also it doesn't hurt to run a larger cable from the alternator over to the fuse block. I actually have two on mine. One is the factory one and the other is just a stock wire from a suzuki grand vitara or something. The whole harness was laying behind my buddies shop so it was free. Its a little larger gauge than the stock vr4 one.


Reason for all this. Why run a 2 gauge positive cable from the battery in the trunk to the front of the car when its only being feed from a wire a 1/4 of the size and is 16 years old.

 

[JSchleim18]

Here's a pic for reference:



Would this be a good ground point for the fuel pump rewire?