Fuel System Pressure Test
1.
Verify that Setup Steps 1-10 from the appropriate previous chapter have been
completed for the specific fuel system type to be tested
.
2.
Verify that the vehicle’s engine is running and check connections for leaks.
3.
Note the vehicle’s fuel system pressure reading from the
Fuel Pressure
gauge on the
control panel of the unit.
•
This is the vehicle’s running pressure. If the pressure is erratic or the vehicle is slow to reach
maximum pressure, the vehicle’s fuel filter may be clogged or its fuel pump
may be weakening.
4.
Return to the appropriate previous chapter,
Fuel System Cleaning Procedures
, to
continue the cleaning process. Otherwise, conclude the test as described below.
5.
Turn the vehicle off.
IMPORTANT
Close the gate valve on the T-adaptor and wrap a shop
towel around pressure fittings before disconnection to
protect against residual fuel spray.
6.
Disconnect the battery leads, hoses, and adaptors. Return the vehicle fuel system to
its normal operating condition by re-connecting the vehicle fuel lines.
