1994 6.5 oil pressure switch

[JerryMiller]

Engine stumbles and stalls. Will start back up. Electric lift pump does not come on. Can jump across fuel pump relay and make lift pump work, engine runs fine all perameters. Saw electrical diagram on web site couple of weeks ago about bypassing oil pressure switch. Does anyone know about this.

[More Power]

If you mean installing a relay to carry the load of an operational Oil Pressure Switch, yes, there's an article available here (http://www.thedieselpage.com/features/sutsos.htm).

Don't recommend permanently jumping the OPS due the safety factor. The way it was designed, if the engine isn't running, the lift pump won't pump fuel (i.e. feed a fire).

Jim