Fuel Injector Balance Test with Tech 2
- Command the fuel pump relay ON and then OFF three times with a scan tool. On the last command, as the fuel pressure begins to slowly degrade and stabilize, select a fuel pressure within 34 kPa (5 psi) of the maximum pump pressure. Record this fuel pressure. This is the starting pressure at which you will pulse each injector.
- With a scan tool, select the Fuel Injector Balance Test function within the Special Functions menu.
- Select an injector to be tested.
- Press Enter to prime the fuel system.
- Energize the fuel injector by depressing the Pulse Injector button on the scan tool at the previously selected pressure.
- After the injector stops pulsing, select Min from the Display Mode on the CH-48027 and record the Min pressure. See Special Tools .
- Clear the Min/Max results on the CH-48027 . See Special Tools .
- Select Normal from the Display Mode on the CH-48027 . See Special Tools .
- Press Enter on the scan tool to bring you back to the Select Injector screen.
- Repeat steps 3 through 9 for each fuel injector.
- Perform the Pressure Drop Calculation.
NOTE:
New test results will not be recorded if the Min/Max results are not cleared after each injector is tested.