Hi I'm looking to have a water injection pump on my turbo camaro,I want to control it via a Pulse Width Modulation speed controller, this has a trim pot using 5v.I would like to replace this with a MAP.
Having hooked up a 12v light bulb ( as the load ) ,I only get @ 0 psi meduim brighness, then at 15 psi it goes slighty brighter.
Any suggestions?, I'd rather keep it independant of the cars stock electrics.

Thanks