Operate the engine to high idle and measure the fuel inlet restriction.
Observe the reading on the gauge.
If the fuel inlet restriction is too high, check the original equipment manufacturer (OEM) fuel lines from the tank for
proper size. Make certain there are no kinks or bends in the fuel lines and the fuel lines are not clogged.
Check the OEM fuel supply tanks for debris (plastic wrappers, paper, etc.) that can intermittently block the fuel
pickup tubes.
Check the OEM fuel lines for internal damage, such as damaged wall linings, that can intermittently block fuel flow.
Make sure there are no OEM clogged fuel strainers or filters, or malfunctioning check valves.
If no issues are found, replace the suction side fuel filter and prime the fuel system. Refer to Procedure 006-015 in
Section 6.
If the issue is intermittent and no issues can be found while the engine is being serviced, install a fuel filter minder,
Fleetguardยฎ Part Number 3892576s, at the connection between the OEM fuel supply lines and the engine. A fuel
filter minder will capture the peak restriction in millimeters and inches of mercury. If the issue occurs again, the fuel
filter minder can be checked to see if there is damage or debris on the OEM side causing the high restriction.
