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Author Topic:   electric fuel pump wiring ?
torino420
Gearhead

Posts: 117
From: Tracy, California
Registered: Apr 2003

posted 06-03-2004 08:50 PM     Click Here to See the Profile for torino420   Click Here to Email torino420     Edit/Delete Message   Reply w/Quote
I have mine wedged in the fuse box in between a fuse and its holder. Currently am installing a fuel pump relay kit and would rather have it more solid. Just trying to get an idea where others have wired in their pumps. In the fuse block there is an empty one that is marked for accesories. Thing is you can't put a fuse in it, it just has the clips for one end of a fuse, could I squeeze something in there?
thanks

[This message has been edited by torino420 (edited 06-03-2004).]

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V8 Thumper
Gearhead

Posts: 4652
From: Phoenix, Arizona
Registered: Dec 2001

posted 06-03-2004 11:16 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
I guess you could, but it'd probably be smarter to tap directly off the battery with a relayed circuit, ignition switched. That way you're not trying to draw high amperage through a 40 year old wiring harness

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1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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Capri
Gearhead

Posts: 1608
From: Lyons, ILL, USA M&M member #007... the secret agent member
Registered: May 99

posted 06-04-2004 09:10 AM     Click Here to See the Profile for Capri   Click Here to Email Capri     Edit/Delete Message   Reply w/Quote
On dads car, we have the power wire coming off the back of the ignition switch, into a toggle switch, and then to the pump. This was you only have power to the pump with the key turned in the on poition.

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torino420
Gearhead

Posts: 117
From: Tracy, California
Registered: Apr 2003

posted 06-04-2004 11:27 AM     Click Here to See the Profile for torino420   Click Here to Email torino420     Edit/Delete Message   Reply w/Quote
Here's what I have so far. The relay has four wires. Relay is mounted in the trunk, as it's supposed to be near the fuel pump.
1) ground
2) fuel pump wire
3) battery wire - will be connected directly to the battery or battery side of the starter solenoid both of which are in the trunk.
4) "switched" lead I have run up front where i need to tap into the ignition switch some how. Hopefully get that done tonight. Short of running it back to the fuse box, I guess I need to find a wire coming off the ignition to tap into?
Thanks for the thoughts, any more are appreciated.

[This message has been edited by torino420 (edited 06-04-2004).]

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wildfire466
unregistered
posted 06-04-2004 12:00 PM           Edit/Delete Message   Reply w/Quote
I'm going to do the same when I start building my car.

Here is a link to some info, fuses and wire type.

http://www.vintagehotrods.net/ford/ContentExpress20-12-9.html

Hope this helps,
Les

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http://www.geocities.com/wildfire1mustang/

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mainer
Gearhead

Posts: 157
From: Bryant Pond, Maine
Registered: Sep 2003

posted 09-01-2004 09:40 AM     Click Here to See the Profile for mainer   Click Here to Email mainer     Edit/Delete Message   Reply w/Quote
torino420, where did you end up wiring the switched wire too?

Thanks,
Don

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68 Mustang Coupe
New engine

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torino420
Gearhead

Posts: 117
From: Tracy, California
Registered: Apr 2003

posted 09-01-2004 10:00 AM     Click Here to See the Profile for torino420   Click Here to Email torino420     Edit/Delete Message   Reply w/Quote
I found a wire under the dash that had juice only when the key is on and tapped into it.
Boy what a difference a relay makes for a fuel pump.

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69 Torino GT Hardtop
420" Windsor

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mainer
Gearhead

Posts: 157
From: Bryant Pond, Maine
Registered: Sep 2003

posted 09-01-2004 08:51 PM     Click Here to See the Profile for mainer   Click Here to Email mainer     Edit/Delete Message   Reply w/Quote
I ran mine to the small "i" post on the solenoid. Engine started for the first time tonight but somethings not right. Car won't start without throttle mashed to the floor and once started runs like crap down low without working the throttle. Up past 3k it runs better and past 4 it sounds good. Multimeter shows 11.5 volts at the "i" post when it's running up high.

don

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Dad Vishus
Gearhead

Posts: 920
From: Moscow, Iowa, USA
Registered: Dec 2001

posted 09-01-2004 10:24 PM     Click Here to See the Profile for Dad Vishus   Click Here to Email Dad Vishus     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by mainer:
I ran mine to the small "i" post on the solenoid. Engine started for the first time tonight but somethings not right. Car won't start without throttle mashed to the floor and once started runs like crap down low without working the throttle. Up past 3k it runs better and past 4 it sounds good. Multimeter shows 11.5 volts at the "i" post when it's running up high.

don



Sounds like too much fuel pressure to me. Look in the carb while its running and see if the gas is pouring in.

If you haven't got a regulator on it, you'll need one. If you have one turn down the pressure a bit. I seem to recall 7 pounds or so max on a Holley. Don't know for positive sure about that exact number.

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63 Falcon 377 Cleveland stroker Flying Toilet alchohol injection. 6.19 @ 110 MPH 1/8 mile
2002 Ranger FX4 daily driver
2000 F350 PSD Crew cab dually - Like commuting in a B52!!
98 US Cargo Phantom II 28'

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