92 E-350 Hard Start
Fleet Mechanic
Joined: Sep 2003
Posts: 1,279
Likes: 1
From: savannah,ga
could be the pump or the pressure reg.
you will need a fuel pressure gauge that attaches to the fuel rail
pressure should be at 40 PSI
with engine at idle
should hold this pressure when the key is off
engine running pull the vacuum line on the pressure regulator
the pressure should go up to 50 PSI or more
you will need a fuel pressure gauge that attaches to the fuel rail
pressure should be at 40 PSI
with engine at idle
should hold this pressure when the key is off
engine running pull the vacuum line on the pressure regulator
the pressure should go up to 50 PSI or more
Cargo Master
Joined: Dec 2003
Posts: 2,182
Likes: 7
From: Saint Augustine, FL
Take the fuel filler cap off and put your ear right next to the filler neck. Then have someone turn the key to the "run" position. You should be able to hear the fuel pump run for about a couple of seconds. It makes a whine/hum sound. You do have to listen closely.
If you don't hear the pump, its likely to have failed. Check the fuses before you replace the pump.
If you don't hear the pump, its likely to have failed. Check the fuses before you replace the pump.
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