Plumb Luck
Recruit
- Joined
- Aug 2, 2012
- Messages
- 1
when the engine is running/idling, is the LP fuel pump supposed to be running continuously or cycle on/off?
Mine seems to be cycling... when it's on, the pressure builds to 8 psi. when it shuts off, pressure in VST drops to about 4 psi and HP fuel pump begins to whine. The LP cycles back on, the pressure builds and the whine goes away.....
If it supposed to be running continuously, any thoughts why it would be cycling on & off? Bad relay possibly? Any & all help is greatly appreciated!
Mine seems to be cycling... when it's on, the pressure builds to 8 psi. when it shuts off, pressure in VST drops to about 4 psi and HP fuel pump begins to whine. The LP cycles back on, the pressure builds and the whine goes away.....
If it supposed to be running continuously, any thoughts why it would be cycling on & off? Bad relay possibly? Any & all help is greatly appreciated!