I don't know how it would work as an "off-on" switch but it will plug a hole that's threaded 1/8 pipe. Seriously, it's tapered threads meant for a standard plumbing pipe with a 1/8''id. Same as an oil pressure switch or a Hobbs switch.
Steve said the spray on light won't come on but it will spray. I just need it so i can get my car tuned right and set at right boost and fuel pressure.
