How to Update Your Terminator X EFI Firmware

Keeping your firmware updated is always a good idea if you're continuously making changes to your tune because you're upgrading the car, adding components to your system, or just chasing down a number or drivability optimization. Follow the instructions in this video to upgrade your firmware properly!

Download the latest Terminator X Firmware at the link below!

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HOLLEY ON SOCIAL:

[marcanthonysuazo]

i have a HOLLEY EFI TERMINATOR X STEALTH GM LS 4150 i bought it in spring 2022 before i do initial start up for 1st time do you recommend i do this and up date the 3.5 display and ecu firmware to current version?

[kimberjones]

Stumbled upon this video. Great info and saved my ass. Thanks

[Matt-dffe]

thanks for the video, just updated my TermX, worked flawlessly and took 5 mins

[Bmwloverlife]

just did this in mine, however after attempting to flash to ecu it says "ECU firmware upgrade failed"

[coldbeerracing]

Can’t I just update from lab top using the sync drop down?

[trippettd]

So in order to update the handheld and the ECU I have to disconnect the prodash?

[chrisbueschel]

jeez how often will I have to go through this PITA process? every 3 months? every year?

[kevinwest]

If going from 2.0 to 3.0 update. Do you skip download from Ecu &save GFC as. Because you already renamed and downloaded tune for 2.0 upgrade.

[DXB]

Thanks for the videos ... will be nice if you put a video for how to set up the camshaft

[etergen]

Best terminator x video on YouTube!! Great job. I’m a subscriber

[jerrydziura]

I get a Folder create error (13) when trying to download the tune from the ECM. How do I get passed that?

[martinramos]

Every time I down load the new gfs..the ecu shows that it's on the stock fox tune..oh I'm running the sc tune..for a fox

[Gillettesgarage]

Thanks dude you save me alot of frustration.

[Shouganaigarage]

Why does no one show how to do it without a handheld?

[jonathanpalahitski]

Is there gonna be a terminator x for the GM 6l80e

[Curtteg]

Got all the way to updating the ECU and it says ECU not found. What am I doing wrong??

[blackwellm]

When is the firmware update coming to enable people to choose "map pressure" under boost>system setup>control method dropdown. You've posted on Facebook and asked what needs to be changed and this the topic of map pressure dropdown selection was overwhelming. What else do you need to hear to make it happen? Holley efi is down right awesome. Make it more awesome by listening to the people that use it

[purge_s]

Will I unupdated firmware cause car not to start

[wesbuilds]

i can't remove any files from my sd card...

[lwjw]

Dude, you have done this before so you don’t realize how fast you are going through this stuff.
It is very difficult to keep up with you. I’ve had to pause and rewind like 10 times already lol……. If you do another video like this, slow down so some of us novice computer people can keep up 😂