Running out of fuel on your current build? Want to support more power, or switch fuel types? Before you tear into the tank for a bigger pump, there is a cheaper answer that solves a lot of cases: push more voltage at the pump you already have.
The FUEL+ is a 40 amp fuel pump voltage booster that provides a constant 18v to your factory pump. More voltage means more flow from the same hardware, which is enough to support meaningfully more power and a different fuel. It is 100% plug and play: no cutting, no soldering, because it uses an OEM style wire pigtail. Unplug the connector to your factory FPDM, install the FUEL+ and the pigtail, and you are done.
OEM style pigtail, no cutting
Tuner friendly
Shown: 2011-2012 Shelby GT500 fitment
Same install, one unit per FPDM
Shown: 2007-2010 Shelby GT500 fitment
What the FUEL+ Does
Your factory fuel pump is controlled by the FPDM, the fuel pump driver module. The FUEL+ installs in line with it and raises the voltage the pump sees to a constant 18v. A pump spinning faster moves more fuel, which buys you headroom you did not have without replacing anything in the tank.
Step 1: Locate the Factory FPDM
- 2005-2014 Mustang GT / GT500: in the trunk, at the rear of the spare tire well.
- 2015-2019 Mustang GT: remove the back seat, then look on the driver's side.
Step 2: Modify the Connectors (2015+ Only)
If you have a 2005-2014, skip to Step 3. On 2015 and newer, two connector housings need trimming so they mate properly.
- Unplug the factory FPDM and remove it using a 10mm socket.
- On the FPDM connector, remove the ribs on the outside so only two small ones remain on each side.
- On the supplied FUEL+ pigtail, remove the shorter ribs that end at an angle. A blade works.
Step 3: Ground It
- 2005-2014: use the factory ground bolt behind the trunk plastic trim.
- 2015-2019: use the 10mm bolt that holds the FPDM to the chassis. Move the FPDM slightly aside and ground the wire under that screw.
Step 4: Connect It
Using the supplied pigtail harness, connect the FUEL+ to the factory FPDM and the factory harness. The small side connector of the pigtail plugs into the FUEL+ connector, then the pigtail connectors go in line between the OEM harness and the FPDM connection. Same on both generations.
Step 5: Mount It
Attach one side of the supplied adhesive velcro to the back of the FUEL+ unit, then:
- 2005-2014: the spare tire well is the best spot. Confirm clearance if your car actually came with a spare.
- 2015+: behind the rear seat armrest trim panel on the driver's side, just above the FPDM. Pull the panel back, remove the foam insert behind it, stick the unit down, and tuck the loose wires before the seat goes back in.
Step 6: Replace the Fuel Pump Fuse
Last step, and do not skip it: swap your factory ATC fuel pump fuse for the supplied 40 amp fuse.
| Vehicle | Fuse |
|---|---|
| 2005-2009 Mustang GT / V6 | F41 |
| 2010 Mustang GT / V6 | F13 |
| 2011-2014 Mustang GT / V6 | F13 |
| 2007-2009 Shelby GT500 | F41, and F6 on the strut tower |
| 2010 Shelby GT500 | F13 and F14 |
| 2011-2012 Shelby GT500 | F13 |
| 2013-2014 Shelby GT500 | F13 and F14 |
| 2015-2019 Mustang GT | #49 |
That is the whole install. Questions on this or anything else in your build, give us a shout. #teamlethal
Frequently Asked Questions
What does a fuel pump voltage booster actually do?
It raises the voltage your factory fuel pump sees to a constant 18v. The pump spins faster and moves more fuel, which supports more power without replacing anything in the tank.
Do I need a FUEL+ for an E85 conversion?
Very often yes. Ethanol needs more volume than gasoline for the same power, so a stock pump that was adequate on pump gas frequently is not on E85. The FUEL+ is the cheapest way to close that gap.
Is the FUEL+ install plug and play?
Yes, no cutting or soldering, thanks to the OEM style pigtail. 2015 and newer cars need two connector housings trimmed to mate properly, which is the only fabrication involved.
Will the FUEL+ support any power level?
No. It gets more out of the pump you have. Past a certain point you need a larger pump or a full return style system. Tell us your target and we will tell you which side of that line you are on.
Do I need to change the fuel pump fuse?
Yes. Replace the factory ATC fuel pump fuse with the supplied 40 amp fuse. The factory fuse cannot carry the additional load.
Is the FUEL+ tuner friendly?
Yes, and it is reliable. It does not fight your calibration, which is why it is a common recommendation from tuners on cars that need a bit more fuel.
What if my car has two FPDMs?
Use the dual unit setup, one FUEL+ per FPDM. The install steps are identical, just done twice.
Keep Reading
More Fuel Without Touching the Tank
A constant 18v, plug and play, and enough headroom for E85 or boost on a lot of builds. Find the one for your car.
