How to get a working fuel system when boosting

I am having trouble with the boost/fuel system I want to create, I have created a UI for the fuel and I want the fuel to decrease when the boost is activated in a trigger volume, but the problem I have is that with the blueprints that make the fuel go down overtime will not work when I have the boost button which is left shift connected to the gate and that is in Levelblueprints.
I need a way around this or a way to fix it so any advice would be very helpful.

how is it not working? what does it do do you see any noticeable changes?

also a few notes here. currently your gate doesnt do anything since its set to start open that means that entering the trigger volume does nothing. you also currently dont have any way to stop your loop which means that it will continue draining your fuel indefinitely. lastly you may want to select your input action events and ensure they are not set to consume input, which could potentially be causing issues.

Well, currently your gate doesnt do anything since its set to start open that means that entering the trigger volume does nothing. you also currently dont have any way to stop your loop which means that it will continue draining your fuel indefinitely. lastly you may want to select your input action events and ensure they are not set to consume input, which could potentially be causing issues. I hope this helps.