Fuel pump pressure?
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New User
Joined: May 2005
Posts: 19
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Fuel pump pressure?
Hi,
I was wondering what the correct fuel pressures are for a 6.9
I'm measuring at the outlet of the fuel filter, before the IP.
The pump produces around 5 psi at light load, but drops when I punch it at higher RPM's to around 2 psi. At the same time the motor begins to miss.
I'll try a new fuel filter, but was wondering what the correct pressure range is.
Thanks,
Jason
I was wondering what the correct fuel pressures are for a 6.9
I'm measuring at the outlet of the fuel filter, before the IP.
The pump produces around 5 psi at light load, but drops when I punch it at higher RPM's to around 2 psi. At the same time the motor begins to miss.
I'll try a new fuel filter, but was wondering what the correct pressure range is.
Thanks,
Jason
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Do a pressure and flow test of the fuel pump at the Schrader valve on the filter header (FSS- fuel shutoff solenoid disconnected on IP). Remove the tire valve core and hook a hose and pressure guage on it should see 4-6 psi when cranking. Then do a fuel quantity test same place, should see 1/3 pint in 10 seconds of engine cranking, route fuel to a suitable container with a hose.
