I am currently looking into installing a propane conversion kit on my '90 f-150.It has a 300 in it and is fuel injected. The conversion kit I plan on using a Millennium LP Propane Conversion Kit For 6 to 10 Cylinder Fuel Injected Gasoline Engines over 3.5 Liters Model LPM8. Does anybody know if while using propane, if the fuel pump is shut off or not? I am worried about burning up my fuel pump when using propane. Thanks.

 

I am not familiar with that kit/manufacturer but when I did conversions I would interrupt fuel pump power after the inertia switch in the pass side kick well and run it to a 3 way switch so that the oem fuel pump circuit powered the LP side. And the inertia switch would "kill" either in an accident.