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JMS PedalMAX Drive By Wire Throttle Enhancement Device (11-19 All)

Market Price $346.99 You Save 17% ($57.99)
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  • Item 390273
  • MPN# PX-5000-1114F

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    Features, Videos & Details

    • Eliminate Pedal Lag
    • Improves Vehicle Acceleration
    • Enhances Low and Mid-Range Horsepower and Torque
    • Eliminates Stalling of Manual Equipped Mustangs
    • Easy Plug & Play Installation
    • Stackable with Common Aftermarket OBD-II Programmers
    • Fits All 2011-2019 Mustangs

    Review & Installation Video

    Hey, everybody, I'm Justin with, and this is my detailed review of the JMS PedalMAX throttle enhancement device available for your 2011 and newer GT V6 and EcoBoost Mustang. In this video, I'll talk about some of the benefits of installing the JMS PedalMax on your S197 or your S550 Mustang and we'll touch on the install itself. And right up front, guys, I'm gonna tell you this is a plug and play job. One out of three wrenches on the difficulty meter but we will have a little bit more detail coming up later on. The JMS PedalMAX is going to appeal to the S197 and S550 owners out there looking to eliminate that annoying throttle lag that can sometimes be a little problematic with the newer drive by wire cars. Now, this thing can be used with or without your favorite custom tune and JMS even claims a little bump in low-end power and torque. But I don't want you guys to get hung up on power numbers because that's really not what the JMS is all about. So with all that said, let's take a closer look at this product. Now the days of having a cable-controlled throttle body are unfortunately a thing of the past. I'm gonna probably sound like an old guy here but I personally prefer having a cable-controlled throttle body to the newer drive by wire technology because I know the moment my foot hits the floor that throttle body will be wide open. With the newer drive by wire cars, the moment your foot hits the floor a signal gets sent to a computer, the computer tells the throttle body to open. Obviously, all this stuff happens very quickly but if you have driven the newer drive by wire cars, you probably noticed the smallest bit of lag in between shifts, especially when you're really rolling gears. And that's where the JMS comes in. Now most of the drive by wire cars are set up or pre-programmed from the factory for the masses. So this means driveability comes first, performance takes a back seat to that. Unfortunately for a lot of us Mustang owners, performance usually takes top priority and the lazy factory throttle can sometimes get in the way of that. So what the JMS is gonna do for you is monitor that throttle signal in real time from your drive by wire setup and then reprogram or remap that throttle signal giving you enhanced throttle response in the process. JMS actually claims that this is going to make the car more manageable in heavy traffic situations or stop and go type situations where stalling can be an issue. This is even gonna help modern Shelby cars which I have heard through the grapevine can be a little difficult to drive for newer owners out there. Stalling can be an issue. JMS claims this really helps out the modern Shelby owners. Again, I can't attest to that personally as I don't daily a Shelby. So the JMS is gonna monitor that throttle signal in real time from your drive by wire application, reprogram it or remap it on the fly, giving you increased throttle response in the process. JMS actually claims that this is gonna help make your car more manageable in heavy traffic situations or stop and go type situations where stalling can sometimes be an issue. Right out of the box, the JMS is gonna give you maximum effectiveness or maximum throttle response the moment you plug this thing in. Now for whatever reason, it's a little too radical for you or maybe it's a little too touchy for your driving style, you can always plug in the included the red 4-pin connector which JMS claims will desensitize this thing by about 40%. So you are still picking up a good amount of throttle response over your factory calibration but the car shouldn't be as touchy. So in essence, you're getting two standard settings with the JMS right out of the box as this product sits right here. However, if you did wanna have the ability to kinda fine-tune your throttle experience using the JMS PedalMAX check out their optional control knob here on the site for another 50 bucks. It does give you a few more settings to play with, and it does give you the ability to kinda change this stuff up on the fly. Now that's something that's not exactly easy with the JMS as it sits right now because you'd have to crawl under the dash, either plug in or unplug that 4-pin connector we just talked about. Not exactly something you can do while at a red light or while on the road. Now as far as using this thing with or without a custom tune, that's entirely up to you. But what I will say is the JMS PedalMAX here will give you some of the benefits of going with an aftermarket tune but without having to flash the car. So for you owners out there who aren't ready to pull the trigger on a tune just yet, this would be a great way to give you some of those benefits with saving you some money in the long run. On the other hand, if you did wanna piggyback this on top of one of your canned tunes that you already have or maybe even a custom tune, that's something you can totally do as well. In fact, check out some of our customer reviews if you haven't done so already. A lot of our customers have actually done this with great success. Just check those things out for yourself. As far as price or value, the JMS will set you back just south of 300 bucks which I admit isn't the cheapest modification for your S197 or S550 but it's certainly more affordable than some of your custom tuning options out there. Now sure, you're not gonna be getting the big power gains from the JMS like you would with those custom tunes but there are still certainly benefits to be had with the JMS. Moving on to the install and honestly, like I said earlier, it doesn't get much easier than this. Simple plug and play job with the JMS, maybe a few minutes from start to finish. And you really don't need a ton of tools to get this one knocked out. JMS does recommend unplugging or disconnecting your negative battery terminal first before getting started with the install. After that simply climb under the dash, remove the plug connected to the top of the gas pedal. After that simply plug in the JMS to that sensor there, plug in the factory harness to the JMS, and your install is complete. So that's my review of the JMS PedalMAX for your '11 to '17 Mustang which you can get right here at

    Eliminates Pedal Lag. The drive by wire accelerator pedal of the 2011 to 2019 Mustang is well known for lag. If you have ever tried to speed up to merge with traffic you have most likely noticed a delay in throttle response. On older Mustangs the gas pedal was attached to a mechanical cable that ran to the throttle body or carburetor that provided instant feedback. However, on modern Mustangs the gas pedal is electronically controlled, similar to a dimmer switch, which has to send the signal to the ECU, which in turn sends the signal to the throttle body causing this momentary delay. To eliminate this annoying delay JMS created their PedalMAX Electronic Throttle Enhancement Device.

    Eliminates Stalling and Improves Power. The JMS PedalMAX will not only eliminate pedal lag, but it will also enhance throttle response, horse power and torque in the low to mid RPM range. The PedalMAX is also ideal for eliminating stalling when accelerating from a stop in manual equipped Mustangs, a notorious issue for the 2013-2014 Shelby GT500's.

    Maximum Throttle Response. Out of the box the PedalMAX Throttle Enhancer is preset to provide maximum increase in throttle response. If you find the stock setting to be to aggressive for your driving needs you can insert the supplied 4-pin RED de-sensitizing plug into the device. The RED de-sensitizing plug will reset throttle response to about 60% of the maximum setting. However, with the optional Remote Throttle Control Knob (part# BX-6999) you can adjust throttle response from zero to maximum or anywhere in between to match your specific driving style.

    Stackable. The JMS PedalMAX can be stacked or used in conjunction with other aftermarket OBD-II programmers and monitors such as: SCT, Diablosport, Hypertech, Superchips, Bully Dog, and Edge as well as JMS' own BoostMAX Performance Booster.

    Modern Electronics. The PedalMAX Drive By Wire Throttle Enhancement Device features JMS's exclusive state of the art digital technology housed in a proprietary sealed enclosure. The PedalMAX comes complete with plug and play wiring harness using OEM connectors for a quick installation.

    Easy Plug & Play Installation. The PedalMAX Throttle Enhancer simply connects to the factory stock pedal position sensor using an OEM style connector with no permanent modifications required. PedalMAX is 100% reversible making it warranty friendly.

    Application. This JMS PedalMAX Drive By Wire Throttle Enhancement Device is designed for use on all 2011-2019 Mustangs including the V6, EcoBoost, GT, BOSS, Shelby GT500 and GT350 models.

    Fitment: 2011 2012 2013 2014 2015 2016 2017 2018 2019 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (1) PedalMAX Throttle Enhancer
    • (1) Plug & Play Wiring Harness
    • (1) Red De-Sensitizing Plug
    • (4) Zip Ties
    • (1) Mini-Screwdriver
    • Installation Instructions
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Boss 302 - 12, 13
    • Bullitt - 19
    • EcoBoost - 15, 16, 17, 18, 19
    • GT - 11, 12, 13, 14, 15, 16, 17, 18, 19
    • GT350 - 15, 16, 17, 18, 19
    • GT350R - 15, 16, 17, 18, 19
    • GT500 - 11, 12, 13, 14
    • V6 - 11, 12, 13, 14, 15, 16, 17

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    Customer Photos (4) Submit Your Photo

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    Questions & Answers (16)

    5 Top Rated Questions

    Will this work with a Bama tuner?

    • If you have a BAMA tuner, you will not need this item.

    Helpful (7)

    Can I install this if I have a Bama X4 Tuner?

    • Generally if you are using a handheld tuner on your Mustang then you already have an adjustment made for throttle enhancement. However, you can turn off the throttle enhancement from the tune and use this JMS PedalMax then you may experience better results. You will not find benefit out of this throttle enhancer if you already have a throttle adjustment made on the tunes your vehicle is running.

    Helpful (2)

    Would this compliment or even be necessary if you have the Ford Performance Power Pack 2 since ECU tune is included with the power pack?

    • The JMS PedalMAX Drive By Wire Throttle Enhancement Device can be used with the Ford Performance tune, allowing further adjustability of the throttle. Wile this would be a benefit, this will see greater benefits on an untuned car, since most tunes will adjust the throttle over stock.

    Helpful (1)


    why does the part seem very different in the video vs the product photo? product photo has a lot more wiring/connectors. video only to leads and module... dw

    Post Your Question
    10 More Questions
    Does this product adjust engine braking response at all? I am looking for quicker and more consistent engine braking response over stock. 0 answer
    does this need a tune and can it work on an automatic.. 0 answer
    Does this device work well on a 2018 GT automatic? 0 answer
    Hello, Can the JMS PedalMAX be used in conjunction with the MSD Launch Master 2 Step Rev Limiter? 0 answer
    How does this compare to a tune? I have a CPO extended warranty so I am looking for ways to keep my warranty. I was debating getting this or possibly the procal ford tune that keeps warranty. But from my understanding that keeps or downgrades to a 3yr/36k. Will the difference be huge between the two? 1 answer
    Will this product void my warranty? 1 answer
    Has anyone used this on a 2017 GT yet. No green light and no pedal response and all kinds of crazy warning lights. Any fixes or ideas. Installed twice and did same thimh 1 answer
    In the event of needed warranty work, if I take the product back off, is it detectable by the dealership? Does it change anything on the ECU? Thanks. 1 answer
    Can this be used along with the BBK throttle body to gain even more torque and HP? 1 answer
    Will this product work with the jms fuel pump booster. 1 answer

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    Customer Reviews (100+) Write a Review

    Overall Rating 4.7

    out of 5 stars

    • Performance Gain 4.372549 4.4
    • Seat Of Your Pants Feel 4.627451 4.6
    • Ease Of Use 4.735294 4.7
    • Bang For Your Buck 4.294117 4.3
    • Preferred Tune: Performance

    • 5/5

      September 16, 2018


      Definitely makes a difference. No need for the adjuster switch in my opinion.


      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      September 14, 2018


      Fellow Mustang Owners - I was amazed what this device did when I installed this in my Supercharged GT! The throttle response after install was like Night and Day! The whole car seemed to awaken with the touch of the gas pedal after installing the JMS Pedalmax! If you have been thinking of getting this.... do it! I promise you that you will be very happy with the results once installed. You will need to relearn your habits with this device as it’s very sensitive when getting on the Gas petal. It awakens the feel of the accelerating aspect like you never imagined in your mustang. All I can say is WOW! AWESOME PRODUCT! I’m a believer! This is a must have device for your mustang!


      Year: 2012 Submodel: GT

      Helpful (1)

    • 5/5

      September 05, 2018

      Pedal Max

      The product works as advertised. There is no more pedal lag at all. I did not realize how much pedal lag that I had until I installed the device. I find some people say that a hole has to be drilled in the fire wall to run the power wire. That is not true. There is a spot in the sheet metal that is notched, under the door trim at dash level. You can route the wire there, go behind the door hinge and fender then back into the engine bay, the wire is plenty long enough.


      Year: 2018 Submodel: GT

      Helpful (0)

    • 5/5

      September 03, 2018

      amazing product

      I have a 2017 mustang ecoboost and I lowered I changed the air filter intake new exhaust and you can feel the difference I recommend this product the performance after installing the JMS PEDALIMAX is the best that I ever add on my car


      Year: 2017 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      August 01, 2018

      Awesome installation

      At first I was a little skeptical but after installing and taking it for a spin it was a very nice purchase. I recommend this product for all mustang owners !


      Year: 2018 Submodel: EcoBoost

      Helpful (3)

    • 5/5

      August 01, 2018


      I have a ton done to my 2011 gt500 but wow this one is sweet!!!!! Well worth the money!!


      Year: 2011 Submodel: GT500

      Helpful (0)

    • 5/5

      July 20, 2018

      womp !

      can feel the difference right off the line , really compliments the JMS CAI , and the Pype Bomb Exhaust. much high RPM and throttle response . Next up is a tune to tie everything together .


      Year: 2014 Submodel: V6

      Helpful (1)

    • 1/5

      July 19, 2018

      Plug and Play?

      Not a true plug and play device. I was sent a JMS PedalMax and it does plug and play but you have to go through the firewall under the dash and connect a red positive wire to the battery from the unit. Misleading, yes. Video still shows a device that does not have the positive wire hookup. Need to update or remove video so customers know exactly what they are buying. Sent back and was sent another manufacturer that is true plug and play. Will review once it has been "Plugged and Played".


      Year: 2017 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      July 17, 2018

      READY-SET- GO !

      this item takes care of the factor throttle lag. it's a must have if you like to drive. The inst video shows the older version than the one they are shipping now, but the enclosed inst help you get it installed, if you have a problem, call JMS, they are very helpful.


      Year: 2015 Submodel: EcoBoost

      Helpful (0)

    • 5/5

      July 05, 2018

      2015 GT Mustang

      I'm using LandM big cams pedalmax work very well with LandM cam


      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      June 28, 2018

      Noticeable improvement

      Reduces pedal lag noticeably Performs as advertised


      Year: 2018 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      June 26, 2018


      Could not believe the difference. This is the way the car should have come from the factory. Hey Guys , Buy It. However its no 10 min. install . Truthfully its about an hour. Hole has to be drilled thru firewall for the wire. Take your time and you will have no problems.


      Year: 2017 Submodel: GT

      Helpful (3)

    • 2/5

      June 24, 2018

      Not Worth It!

      Pedal max has made little difference on my 2016 V6 Mustang. There is a TINY improvement in throttle response, but certainly, to me anyway, not $250 dollars worth. Also, it is not just plug and play. There is a power lead that must go from the interior through the firewall to the battery, definitely not a 15 minute install.


      Year: 2016 Submodel: V6

      Helpful (1)

    • 5/5

      June 06, 2018


      I can't believe I didn't buy this before now! It feels like a different car! I have a 15 RS3 Roush phase 1 and it feels like I just got phase 2 installed. I love it!


      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      May 31, 2018

      Great item

      Noticed the difference right away! No more lag time , especially during stop and go traffic, acceleration is there right when you step on it. Thank you


      Year: 2017 Submodel: EcoBoost

      Helpful (4)

    • 2/5

      May 24, 2018

      Not for Shelby

      This didn't work the way it was described. I still feel lag when I press the accelerator.


      Year: 2016 Submodel: GT350

      Helpful (4)

    • 4/5

      May 24, 2018

      Very cool.

      Definitely a noticeable increase to throttle responsiveness.


      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      May 23, 2018

      Plug and play

      I hesitated on making this purchase but glad I finally decided to get one. This item could not be any simpler to install. The device is quite controllable right out of the box. I didn't see a need to plug in the de-sensitizer that it comes with.Found it worked best in conjunction with my paddle shifter


      Year: 2017 Submodel: V6

      Helpful (3)

    • 5/5

      May 17, 2018

      Well worth it

      Crisper throttle response than stock. Plug in take 20 mins. A must do mod.


      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      May 12, 2018

      Helped out alot

      So as long as you can get to the pedal it’s an easy install. I immediately noticed the awesome throttle response. My only issue with this is that my car redlines and doesn’t shift unless I let out of the throttle a bit. A tune should fix that issue but other than that this mod is a solid upgrade.


      Year: 2012 Submodel: V6

      Helpful (3)

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