Really? Were your running it at 18v 24/7? Really curious. What was going on when the FPDM crapped out? I have a spare and two fuses but I just put them in my garage instead of the trunk thinking I was being paranoid.
No it was at 21v and 75% throttle activation, my problem was every time you turned the key off then on again it would be boosting all the time like it lost the program settings. My replacement should be here tomorrow and my FPDM is here today.
I would check the booster every once in a while and make sure the light isn't blinking with the key on or just idling. Blinking is when the booster is boosting.