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Testing
Active Fuel Injector Tester User Guide
Injector Test (cont.)
• View Test Results—displays the results of the last completed test. For further
information, see the section Viewing Test Results.
• Upload Test Results—use to upload test results to the shop computer to analyze and
save the data with the AFIT PC Application Software. For further information, see the
section Viewing Test Results.
AFIT saves the last test results in memory even when power is disconnected. The saved results
are overwritten when a new injector test is completed.
Pressure Test
This test graphs the fuel pressure over time with approximately 10 seconds of pressure reading
displayed on the screen at one time. It also provides a real time digital reading, and the
minimum/maximum pressures since the last time the ENTER key was pressed. Use the keypad
during the pressure test to do the following:
• UP—to freeze the current screen
• ENTER—to reset the min/max
• CANCEL—to exit/stop the test and return to the main menu
Leak Down Test
This test provides you with the following information:
• Current fuel pressure
• The time since the fuel pump was last run after a brief settling time or you pressed the
DOWN button to de-pressurize the system
• The pressure difference between the current pressure and the pressure immediately
after the pump was run or the DOWN button was pressed
Use the keypad during the leak down test to do the following:
• UP—to run the fuel pump from the tester
• DOWN—to de-pressurize the system
• CANCEL—to exit/stop the test and return to the Main menu
During the test, Fuel pump is ON and Fuel pump is OFF is displayed to let you know when the fuel
pump is running.
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