Fuel system (cont...)
Check the fuel pressure – if no/insufficient pressure then:-
1.
Can you hear the pump(s)?
If not, check the electrical connection – use a multi-meter on ‘DC’ setting if
necessary. If yes, check if they run in the right direction. (wiring direction “+” and “-”)
2.
Is there FUEL to the Pumps?
Check fuel taps and that check valves are correct – and that fuel is in the
selected tank. Check for blockages/restriction in the lines (kinks, collapsed lines etc)
3.
Do you have the right fuel lines?
You need 1/2“/12mm I.D. lines (-8) to the pumps to ensure sufficient
volume at the intake.
4.
Are you sucking air?
Check pick-up points in the tanks and no weak spring drains that allow air to be sucked –
if necessary provide fuel from a slave tank to test flow.
5.
Are you sure your instruments reading correctly?
To check pressure install a second analogue manometer in
the fuel line. (Ask your agent for the ULP oil and fuel pressure trouble shooting kit T080001)
6.
Are the filters blocked?
Check pre-pump and fine post-pump filters for blockage, replace if necessary.
7.
Check return line
is not compromised or closed off NOTE: min 1/4”/6.35mm (-4), ideally 3/8”/9.5mm (-6)
8.
Pressure Regulator?
There might be a fuel pressure regulator problem (please contact your ULP agent)
TO SEE FUEL FLOW CHECK CLICK HERE
