Which wire goes to fuel pump?
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From: Bridgewater,Ma
Re: Which wire goes to fuel pump? From what I found tonight it was the white wire that powered the pump.This was the harness from the bulk to the pump.So I'm figuring that the gray wire that everyone is saying is the wire before the bulkhead connector?I put a voltage meter on the 2 grays in the harness and one read 5v and the other 0 volts when starting the car.The white wire would read 12v for a second when key is turned to run.Then when I started the car it had the battery voltage on it.When I cut the wire the car would not run due to no fuel.
Re: Which wire goes to fuel pump? I'm not sure about the wire color after the rear seat relay. When I wired my Walbro in-line pump I powered it from the aux. positive post near the fuse boxes in the engine compartment. I used a 30 amp relay with a 20 amp fuse and triggered the relay off the gray fuel pump power wire coming out of the fuse box. Many people told me not to try to power the pump off of the small factory power wire (too much voltage drop). You might want to check out Vortec's T-rex instructions using this link (starts on page 14):
http://www.vortechsuperchargers.com/...s/4gk218im.pdf
-Ken
http://www.vortechsuperchargers.com/...s/4gk218im.pdf
-Ken
Thread Starter
LS1Tech Sponsor
iTrader: (12)
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Re: Which wire goes to fuel pump? I actually just needed that wire to power a relay.I ran a 10 gauge wire back to power a Kenne Bell boost a pump.The stock pump feed switches the relay to power the pump,then when we spray the nitrous another relay kicks in and adds the extra voltage that we set.
