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Old 12-17-2016, 02:36 PM
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Fuel rail location question on a 2013 jk ?

Hey guys I have a 2013 JK sport unlimited, & would like to install an electric fuel pressure gauge from Auto Meter. I need to be able to access the fuel rail to install the gauge sending unit to the schrader valve.

I have spent about an hour trying to even find where the fuel line feeds the fuel injectors! Any help would be GREATLY appreciated.

All The Best,

wranglerman13DP

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Old 12-17-2016, 04:43 PM   #2
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You arent going to be able to just tap into the fuel rail. It's mostly plastic.

How I would install one, would be to tap into the line on the underside of the vehicle. There is a standard EFI fitting there that you could attach to. Here are a few pictures from when I switched to fuel cell.

In this picture, the line with the fuel pump and red/blue fitting on it leads directly up the side of the motor to the fuel rail. I am almost positive it is a female 3/8 SAE fitting, looking back in my amazon orders.

Just be aware that there would normally be the front of a fuel tank here.

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Old 12-17-2016, 11:12 PM   #3
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Fuel line connection to the fuel rail circled in yellow.
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Old 12-17-2016, 11:17 PM   #4
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Here's what the whole fuel rail and lower intake manifold looks like:

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Old 12-18-2016, 11:21 AM   #5
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Yea, where @UselessPickles shows a connection would work as well, assuming there is enough room to fit an adapter in there with a port.

Pickles, would both connections show the same fuel pressure? Would one be more accurate than the other?

I feel like this would work close to the fuel rail, but I dont know what size it is there. I feel like it is 3/8".

http://www.nitrousoutlet.com/fuel-de...e-adapter.html
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Old 12-18-2016, 02:19 PM
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Thanks a million for your help thus far!

I was just on Jegs web site & found two 3/8 SAE EFI quick connect adapter fittings that could possibly work to use in threading the fuel pressure gauge sending unit into.

One of them would require an additional fitting with 1/8 NPT internal threads to install the sending unit. The other one actually has a 1/8 NPT port.

The two questions that I have are (1) Do you need a special set of pliers or wrenches to disconnect the FACTORY EFI disconnect fuel line fitting at the fuel tank, & what type of an (in line) fitting set up would I need to thread the sending unit into?

Sorry for all the questions, this is all new to me. When I had my 2003 600 hp.BLOWN Corvette that was built by Lingenfelter Performance Engineering, I just threaded the (same sending unit) into the fuel rail located on the top of the LS6 motor.

Thanks again guys for taking the time to help me with this fuel pressure gauge install. The 2 5/8 dia. water temp & fuel pressure gauges will actually be installed in a carbon fiber panel that I designed myself & will be installed in the dash in the factory radio location.

As for the radio, I will be installing a hidden audio receiver in the center console, or possibly under the back seat that will be operated with a hand held remote.

Thanks Again,

wranglerman13DP
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Old 12-18-2016, 02:23 PM
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Here are the photos of the 3/8 SAE EFI adapter fittings that I found on the Jegs web site.
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Old 12-18-2016, 03:43 PM   #8
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the bottom one should be what you need
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Old 12-18-2016, 07:18 PM   #9
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Quote:
Originally Posted by Tweak View Post
Pickles, would both connections show the same fuel pressure? Would one be more accurate than the other?
Fluid flowing through hoses/pipes/etc always experiences some amount of pressure drop, so fuel pressure should generally be higher the closer you are to the fuel pump outlet, and lower the closer you are to the fuel rail. Reading fuel pressure at the fuel rail would be most accurate.

How much is the pressure drop between those two locations, and is it enough to be bothered about? I have no idea.
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Old 12-18-2016, 11:28 PM   #10
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Quote:
Originally Posted by UselessPickles View Post
Fluid flowing through hoses/pipes/etc always experiences some amount of pressure drop, so fuel pressure should generally be higher the closer you are to the fuel pump outlet, and lower the closer you are to the fuel rail. Reading fuel pressure at the fuel rail would be most accurate.

How much is the pressure drop between those two locations, and is it enough to be bothered about? I have no idea.
Yea that's what I was thinking. Good to know that there is another EFI fitting there, I may get around to replacing all of the fuel lines. I currently have just run line from the fuel cell to the connection next to the transmission.
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Dana 60 front, 14 Bolt rear, ARB's, 5.38's, 35 spline Yukon shafts, Reid Knuckles, 40" Comp Trepadors, 3 link front, triangulated 4 link rear, 14" coilovers front and rear, Tom Woods 1310 front, Adams 1350 rear, PSC Hydro assist, SuperWinch 9500,
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Old 12-19-2016, 12:33 PM
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Thanks again guys for your help thus far. Do you need a special set of pliers or wrenches to release the FACTORY (EFI) QUICK CONNECTOR in the fuel line?

Thanks again for taking the time to help me out with the EFI fuel line fittings.

I hope you guys get some great jeep parts from Santa on the week-end. I think he is bringing me a NEW exhaust system for the JK!

All The Best,

wranglerman13DP
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Old 12-19-2016, 08:15 PM   #12
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Quote:
Originally Posted by wranglerman13DP View Post
Thanks again guys for your help thus far. Do you need a special set of pliers or wrenches to release the FACTORY (EFI) QUICK CONNECTOR in the fuel line?

Thanks again for taking the time to help me out with the EFI fuel line fittings.

I hope you guys get some great jeep parts from Santa on the week-end. I think he is bringing me a NEW exhaust system for the JK!

All The Best,

wranglerman13DP
I dont believe you will need a tool. It's a funny little plastic clip thing that pulls out perpendicular to flow. Be careful, you can break them.

If you do end up needing a release tool, autozone has them.

Dont forget, that fuel line is probably under pressure. You can pull the fuse to the fuel pump, start the jeep, and let it die. This will remove all fuel pressure.

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Billet 2013 2 door
Dana 60 front, 14 Bolt rear, ARB's, 5.38's, 35 spline Yukon shafts, Reid Knuckles, 40" Comp Trepadors, 3 link front, triangulated 4 link rear, 14" coilovers front and rear, Tom Woods 1310 front, Adams 1350 rear, PSC Hydro assist, SuperWinch 9500,
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