Engine/Transmission (1998.5 - 2002) strange fuel pressure readings

[Dixon]

Hi I seem to have some strange readings on my fuel pressure gauge on start up and would like to compare what others are getting. When I turn on the key to heat the manifold the needle jumps to about 6 and then starts falling back to O Because I have been having problems with the injection system I sometimes cycle it twice and the gauge will go up a little higher but will still fall back to O within 2-3 seconds. When the motor is running it's reading around 13 so no complaints. I put on a new lift pump but unfortunately not before the injection pump was damaged but that is another day. Anyway how do these figures compare to what others are seeing? Thanks for the time. ben



2000 Freightliner FL 60

 

[DKothe]

Mine does the same

Ben,

Mine does the same but it pressures up to approx 14lbs then drops to 0 when the system is pressurized. This is normal operation from what I know.