I don't use that much alky with mine. Maybe a gallon for every 3 -4 tank fulls. If I'm extreamly heavy on the hammer. Then 3/4 gallon per tank full of gas is about my usage.
I had a mitsu at the house a while back similiar symptoms. They bought a kit off of ebay. Was a varicool kit reboxed. Or at least the pump and tank had someone elses stickers on it, and it wasn't coolingmist they bought it from. Was sold/promoted as a dual nozzle kit.
Anyway it turned out the lines from the pump to the nozzles where draining out. Not enough fluid here to kill or trouble the engnie. At the same time as fast as this car went from zero to scarry wasn't enough time for the pump to fill the lines again. Decel/coast and what little was in the lines drained again.
Either the kit directions specified or the installer chose to run two lines from the trunk to the nozzles. I never got a straight answer from the owner. ( I think he did the install)
Oh yeah the fix was just moving his check valve, removing a line, and adding a tee fitting.
May not be your case though.
