I figured reviewing a throttle controller would be pretty straightforward; a quick plug-and-play install and an opinion after driving around for a few days. However, the Ultimate9 evcX took me by surprise. I was impressed with the multitude of features and found a unique capability that might even convince the biggest critics of throttle controllers.
First, let’s get into what a throttle controller is and what makes the evcX unique. Throttle controllers commonly utilize a Y-style interceptor plug between your gas pedal and accelerator assembly, allowing you to adjust throttle response.
We can all agree that a stock Tacoma has decent power, but drives sluggish. The evcX can tighten up your throttle response to feel more responsive on the road. Conversely, it can delay response to minimize wheel slippage off-road. If you park your truck outside, there’s also a security lock mode that shuts down your pedal completely as a theft deterrent.
Let’s get into the features and the very quick installation.
Table Of Contents
Features
In the box, you’ll get a wiring harness, mounting supplies, instructions, and the unit with a carrying case.
The EVCx unit has an OLED display and is small enough to mount in-view or tucked away based on your preference. It measures (L) 51 x (W) 32 x (H) 8 mm.
The app is very responsive, connects immediately, and has an array of user-friendly options. You can adjust interface style, color, and password protection. It also includes transmission options (Auto and Manual modes).
Next up are the modes, all easily accessible with a very clean and responsive app that is available on both iOS and Android phones.
Modes
- Ultimate9 Mode: Highest response setting.
- Ultimate Mode: 9 different levels to choose from.
- Launch Mode: Made for taking off, focused on reducing wheel spin to improve traction.
- Adapt Mode: Unit determines what is best based on your driving.
- Eco Mode: A reduced response to improve MPG.
- Anti-Slip Mode: Good for wet situations.
- Valet Mode: Made to limit vehicle potential when being valeted.
- Factory Mode: Simple, this is just your regular response.
- Lock Mode: For security and theft deterrence.
Initial Impressions
After driving with the evcX for the last month installed on my 6-speed 3rd Gen (’22) TRD Pro, I found that I often bounce between the Adapt and Ultimate modes, depending on my daily driving needs. I occasionally use the Utlimate9 mode when I need some extra oomph. I utilize the Lock Mode anytime my vehicle is parked for longer periods of time, especially overnight (even in the garage). Anytime I leave my truck at the shop, I swap to Valet. I have not experienced any jumpiness or evidence of ECU or pedal confusion.
Having a more responsive throttle makes driving more enjoyable and is also a lifesaver. That rollback from a stop on White Rim Road in Utah is a much different experience than your stoplight-on-a-hill situation when the drop-off behind you looks like a thousand-foot plummet.
The Secret Weapon
I received the evcX and also planned on flashing my ECU with an OTT tune. Do I have to choose one? Do they conflict or cause any problems when using both? I was unsure; so, I called Ultimate9 directly and not only were they responsive and very friendly, they also had an answer to that exact question.
The setup integrates with no issues to any vehicle tune. When I had the OTT tune installed, I could choose from throttle response levels Mild, Medium, and Spicy. However, when you choose your throttle response with a tune, it is static. You do not have the ability to adjust on-the-go. Well, now you do.
The evcX allows you to reap the power gains of the OTT (or any) tune while having full adjustability of your throttle response. Whichever OTT throttle response you choose upon your flash becomes your new baseline for the Factory Mode on your evcX . You can still increase that by 10 levels, lower it with the Eco and Valet modes, and utilize Lock Mode.
My 3rd Gen was morphed into what felt like an entirely new truck in a matter of hours. I feel like I’m hacking the system and thoroughly enjoy having the ability to customize my driving experience on-the-go. It rules.
Installation
Ensure your vehicle is turned off and, if applicable, the key is removed from the ignition.
Next, disconnect the negative terminal of your vehicle’s battery. I do this whenever I’m fiddling with anything electrical in my truck.
Then, locate your accelerator pedal’s wiring and connection points.
Step 1. Mount Controller Unit
Find a suitable location to mount the controller within easy reach of the driver. With the ability to utilize the phone app, I chose to mount the puck somewhat hidden away.
If you plan to utilize the Lock mode, the puck can be mounted via Velcro or similar removable backing for easy removal. Ultimate9 provides a carrying case for this scenario.
My favorite physical design of the evcX is that it has a USB-C input on both sides so your wiring stays clean. It comes with a rubber plug for the port you’re not using.
I partially removed my dash components to make the wiring as clean as possible. Hide away the wiring however you’re aesthetically comfortable. Most importantly, ensure all wires are tucked high and away from your legs and feet while driving.
Step 2. Connect Harnesses
Disconnect your accelerator pedal assembly by depressing the retention clip facing the passenger side. Note that this clip is flimsy plastic, so don’t force anything.
Next, connect the Y-harness between the male and female connections.
To prevent “confusing” your ECU and earning a check engine light (CEL) on your dash when you turn on the truck, connect the male end to your Y-harness first. Then, connect the Y-harness directly to the female connection on your pedal.
Again, be mindful that you’re working with very small wires and flimsy plastic clips. Be gentle and make sure you hear a “click” to make sure your connection is secure. Nothing should feel forced or need to be pulled on or pressed on aggressively.
Step 3. Clean Up Wiring
The Y-harness is designed to sit above your accelerator pedal and should not impede the function of the pedal itself. Ensure your harness is secured, does not jiggle, and the wiring is tucked away.
I utilized additional zip ties and 3M wire mounts to ensure my cords were organized and not pressing against any parts of the truck that heat up.
Reconnect Battery & Test
Reconnect the negative terminal of the vehicle’s battery, turn on the ignition, and ensure you have no CEL or similar warnings on your dash.
Confirm that the throttle controller is operational by connecting to your Ultimate9 app. Follow the included instructions to get set up and familiar with the features.
Finally, test drive and fine-tune the settings to your level of comfort and enjoyment.
Final Thoughts
Look online and you’ll inevitably read about how throttle response devices are gimmicky and you should “just get a tune.” Well, you could do both, actually. The evcX is well thought out and the customer service was fantastic. It’s a quick and simple install, looks clean once mounted, has a wide array of functions and a responsive and user-friendly phone app.
The ability to integrate and seemingly “hack” the adjustability of my tune made this product an easy keep. For that reason, I would easily recommend the evcX over other throttle controllers on the market.
