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GT500 fuel pumps DIY w/ Pictures!

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Old 04-01-2010, 03:34 PM   #21
candymanjl
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awesome! one day I'll have enough power to need one of these setups
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Old 04-19-2010, 08:15 PM   #22
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Well I followed these directions to a T and my car started for a few seconds and then died everything is hooked up right as far as wiring goes my gas gauge and miles to empty work right, currently shows 20 miles to empty.

Only thing I can think I possible done wrong is as follows please help...

The new GT 500 pump has a black hose with a wire tie on it, it looked like it was supposed to be this was. Was I supposed to cut that wire tie and let hose go straight down instead of going upward like it was out of the box?
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Old 04-20-2010, 05:50 AM   #23
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Do you hear the pumps turn on when you turn the key?
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Old 04-20-2010, 07:33 AM   #24
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Quote:
Originally Posted by Analyzer52 View Post
Well I followed these directions to a T and my car started for a few seconds and then died everything is hooked up right as far as wiring goes my gas gauge and miles to empty work right, currently shows 20 miles to empty.

Only thing I can think I possible done wrong is as follows please help...

The new GT 500 pump has a black hose with a wire tie on it, it looked like it was supposed to be this was. Was I supposed to cut that wire tie and let hose go straight down instead of going upward like it was out of the box?

check your fuse to the pumps and check to make sure you put the relay back in the correct spot. im not sure what hose your talking about with a zip tie.
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Originally Posted by tampa07gt View Post
Next week *****'s going to wire his electronic throttle to the fan relay and run it off his on board LAN to NASA to ensure he runs at the correct temp based on real time global atmospheric conditions. Oh yea after he makes his own installation tools
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Old 04-20-2010, 10:21 PM   #25
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I'm posting this here for the benefit of everyone not to make the same stupid mistake I did. Make sure you put the fuse in the cap ford made no mention of this just talked about hooking the wires up but never about where to plug the fuse in. Maybe this goes without say for most but I couldn't figure it out until I got help.

Thanks to 2007CalSpec:

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Originally Posted by 2007CalSpec View Post
The old fuel pump connector doesn't get used which is correct. You only need the two wires from it for the fuel level gauge.

During my Whipple install, I noticed the end of the harness for the GT500 pump had a pin connector which seemed odd. How am I going to use that connector to hook it up to the fuse block in the engine bay, I asked myself. I then realized what that little fuse and fuse holder with the red wire was for. The pin connector slides into the back of the fuse holder and the fuse holder connects to a black cap. The red wire then connects to the fuse block. I've included some pics of the fuse and fuse holder...

I'm pointing to the power wire from the GT500 fuel pump harness.
Click the image to open in full size.

I'm pointing to the power wire that is attached to the fuse holder and that connects to the fuse block.
Click the image to open in full size.

I'm inserting the fuse holder into the black cap to secure it.
Click the image to open in full size.


I don't know if that will solve your problem but it's a start. Also, when was the last time you changed your fuel filter?
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Old 05-04-2010, 09:56 AM   #26
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Just wanted to say Thanks One Eyed *****. Without your write up and pictures I would have been lost on a few steps when installing the new pump.
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Old 05-04-2010, 01:35 PM   #27
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Great write up i'll need this once i get my Turbo installed.
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Old 05-04-2010, 06:43 PM   #28
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Quote:
Originally Posted by geocomp View Post
Just wanted to say Thanks One Eyed *****. Without your write up and pictures I would have been lost on a few steps when installing the new pump.


good to hear!
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Next week *****'s going to wire his electronic throttle to the fan relay and run it off his on board LAN to NASA to ensure he runs at the correct temp based on real time global atmospheric conditions. Oh yea after he makes his own installation tools
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Old 05-04-2010, 08:26 PM   #29
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Quote:
Originally Posted by one eyed ***** View Post
check your fuse to the pumps and check to make sure you put the relay back in the correct spot. im not sure what hose your talking about with a zip tie.
My GT500 pump has the zip tie on the black hose also and I left it alone. Haven't had any problems.
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Old 06-05-2010, 04:22 PM   #30
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I just have to say...
T H A N K Y O U all so very much!!!

I just installed the GT500 pump, and my kit came with no instructions, so the writeup here is what I followed (so far). The tips on using the notches worked out very well, as that really made it easy holding down the pump while the ring was put into place. And the mention of the dimples in the ring helped as well.

A couple things I ran into, to watch out for:
- the inner fuel line initially got caught and was pushed down out of the way, so I had to pull the pump back out to get to the hose. To keep it up and accessible, so it wouldn't get pushed down again, I used some string to tie the fuel line up (using the wiring harness near the back/side), then when the pump was far enough in, released the string, helping to keep the inner line connector where it could then be put back on.
- getting the pump to over the body was a little tricky, as the fuel pump hole is not exactly centered over the pump hole. Had to rotate the pump a little to get it into a position so I could work the top under the body (the front of the hole in the body is not front-forward enough, as shown in the "Inside the tank you can see the passenger side line" pic. Just carefully work over the lip, then rotate it back into position.
- a note was mentioned about the float, making sure it clears the inner wall; with enough fuel, it's easy, as the float will float. And it's easy enough to see it with the pump mostly in. Yay.
- lastly, I had an issue with the stock wiring harness: it has a part number tag near that end of the harness, and the tag was partly under the pump. So popped the pump out of the 2 retaining notches, slightly raised the pump, and this time made sure the stupid harness tag was not under the pump!

I had a little under 1/4 tank of fuel in the car, and that left about 3-4" in the tank on the driver side. A little more than what i would have liked, but in getting the float in proper position, I was glad I had that much in there!


Now, on to wiring and connecting the harness. I already have a larger 10 ga. wire running back from the engine compartment (as part of an earlier pump wiring upgrade), so I won't have to do that run.

Again, thanks for the great writeup!!!!
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Old 08-02-2010, 07:07 AM   #31
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I just finished my install and it worked out great. I had the new pump back in, in about 30 min. Maybe 3 hrs total time, and totally goofing off while doing it. This could probably be done in about 1.5 hrs if necessary.
My only differences from the write up:
The wires pulled out of the old connector to the new needed to be swapped to get the fuel gauge to work. In other words, the light green and light blue wires needed to be hooked up opposite of what it should be. Light green gets connected to the light blue on the other end, and vice versa.
I also did not have to cut another hole in the rubber cover to the pump. The new harness took the place of the factory one.
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Old 12-12-2010, 05:30 PM   #32
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Sweet....I can do this. Thanks one eye.
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Old 12-12-2010, 06:58 PM   #33
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I'm glad you bumped this thread up.

This is a very excellent write-up with step by step instructions that is both exact and exhaustive.
I learned a ton from this thread.
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Old 06-12-2013, 06:48 AM   #34
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could someone tell me what size inline fuse is used in the power wire?


bye the way...this write up is a great source!
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Old 06-12-2013, 09:42 AM   #35
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30amp
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Next week *****'s going to wire his electronic throttle to the fan relay and run it off his on board LAN to NASA to ensure he runs at the correct temp based on real time global atmospheric conditions. Oh yea after he makes his own installation tools
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Old 06-12-2013, 11:49 AM   #36
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thank you
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Old 11-06-2013, 08:06 PM   #37
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I just did this and just wanted to make sure people that are doing this are now using a DUAL Boostapump. I think I see some are using single boostapump?
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Old 11-06-2013, 10:43 PM   #38
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Yes if you are going to add a BAP you will need a dual unit, or 2 singles.
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Old 11-06-2013, 10:50 PM   #39
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Great write up, I helped a buddy install this pump, seemed complicated at first but, very easy as you stated, the wiring may seem intimidating but, it's pretty straight forward.
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Old 06-16-2014, 05:39 PM   #40
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I've just installed my dual fuel pumps and I'm getting a reading on 0 on my gas. Has anyone had this problem?
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Old 06-16-2014, 05:39 PM
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