most late model cars has a combernation oil pressure senser/fuel pressure switch installed on them that most people dont understand how they work, so if you would like to know just click on this address and learn something. i did.

you could install one of these switches on any motor and use it to cut something on, only when the motor was running. think about that a little while.


http://members.aol.com/kanhandco2/index.html?f=fs