Need some EFI help ASAP please.

88 Fox GT

Active Member

Nov 18, 2002

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Iowa

Aug 26, 2004

#1

• Aug 26, 2004

• #1

I took out the fuel pump and wiring harness for the pump, but I am stuck. I modified it and removed the wires for the tail lights and un-needed stuff. So here's my problem. There is a brown/red wire running from the pump to the inertia switch, then a green/light green wire runs from that to a connector and another harness. I am at a loss right now. Where does this green/light green wire go to? What did you guys do to hook up the power to your fuel pump? What all am I going to need to get the fuel pump working on my '65? The fuel pump wiring is the last thing I need off the donor car and want to get rid of it ASAP. Thanks!

 

M

mustangracer

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Jun 15, 1999

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Southern California

Aug 26, 2004

#2

• Aug 26, 2004

• #2

Dunno the colors for a 94-95, but the fuel pump feed goes to the inertia switch and then to the fuel pump, the other lead from the fuel pump goes to ground. There should have been a short connector harness on the fuel sending unit that has the fuel pump and fuel sender feeds.

I think the stock wiring has a ground in the harness for the fuel pump and sender, but I think you can just run the grounds to the body.

 

88 Fox GT

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Nov 18, 2002

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Aug 26, 2004

#3

• Aug 26, 2004

• #3

I know where I can hook up my ground wires. But, I'm talking power wire. Into the ignition or what?

 

F

Fostang

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May 8, 2002

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Stockton, Ca

Aug 26, 2004

#4

• Aug 26, 2004

• #4

Fuel pump-has positive and negative. Negative obviously simply grounded.

Positive comes from fuel pump relay.

Fuel pump relay has 5 wires hooked to it.

1- is the 12 volts constant
2-12volts out and on this wire there is a fuel pump monitor wire that runs to the eec.
3-turn on lead from eec low voltage.
4-ground.

 

88 Fox GT

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Nov 18, 2002

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Iowa

Aug 26, 2004

#5

• Aug 26, 2004

• #5

Where can I find the fuel pump relay?

 

F

Fostang

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Aug 26, 2004

#6

• Aug 26, 2004

• #6

under the drivers seat.

of and forgot to mention the inertia switch should be hooked to the line from the eec to the relay. On some cars it's the main 12 volts from the relay to the fuel pump.

 

F

Fostang

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Aug 26, 2004

#7

• Aug 26, 2004

• #7

relay is a green one.

 

88 Fox GT

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Nov 18, 2002

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Iowa

Aug 26, 2004

#8

• Aug 26, 2004

• #8

I looked under drivers seat when I heard it was under there before. No relays what-so-evern. Is there any way I can do it on my own without all the extra jumbo? The EFI swap is starting to get hecktic, I have alot of stuff to modify using a '94 engine.

 

F

Fostang

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Aug 26, 2004

#9

• Aug 26, 2004

• #9

yeah get yourself a relay and wire it like I stated above.

Oh thats right I think the relay is in the engine compartment in sn95's

 

88 Fox GT

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Nov 18, 2002

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Iowa

Aug 26, 2004

#10

• Aug 26, 2004

• #10

Where can I find the fuel pump relay that I need at a parts store or something? Any pics of one hooked up? My head is just spinning trying to figure out all the stuff I need to modify to make this engine work...ahhh!

 

F

Fostang

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May 8, 2002

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Aug 26, 2004

#11

• Aug 26, 2004

• #11

first take a deep breath and relax, it's easy if I did my first efi swap at age 19 you can also.

Getting a wiring diagram will help you understand what all those wires are.

Yes you can get a relay from the parts store.

Sorry no pics.

 

88 Fox GT

Active Member

Nov 18, 2002

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36

Iowa

Aug 27, 2004

#12

• Aug 27, 2004

• #12

Yeah, I'm doing this swap at 16 years old. So far I'm doing ok, it's just the wiring and stuff that's got me in a bind as to what I'm gonna do. lol

 

WORTH

20+ Year Stangneter

Nov 18, 2002

2,166

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98

Cape Cod, Ma.

Aug 27, 2004

#13

• Aug 27, 2004

• #13

OK, I have all the wiring diagrams, what did you steal the computer out of?
year make model and engie code?

 

P

PCH_Cruiser

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Jul 31, 2002

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Palmdale, CA

Aug 27, 2004

#14

• Aug 27, 2004

• #14

Any standard relay will work, it doesn't have to be from the donor car. Parts Express has Bosch relays for $2 each. If you've never wired your own relay, go to this website and scroll down to section 36. The computer supplies the turn on signal to the fuel pump. Get power from a good source like the fuse box.

 

CochinoFilipino

Founding Member

Jan 14, 2002

171

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19

CA

Aug 27, 2004

#15

• Aug 27, 2004

• #15

You can always search and post in the 94/95 od 5.0 sections. I did a search on 'pump relay' and got this
http://forums.stangnet.com/showthread.php?t=478826&highlight=pump+relay