User Manual Q&AAnswer
Feb 17, 2025 - 02:31 AM
To perform the fuel injector balance test using the MOTOLOGIC CH 47976 Fuel Injector Balance Test tool, follow these steps:
1. Set the amperage supply selector switch on the fuel injector tester to the Balance Test 0.5–2.5 A position.
2. Connect the J 39021 Fuel Injector Coil and Balance Tester to a fuel injector using the J 44602 Adapter.
3. Command the fuel pump relay ON and then OFF three times with a scan tool. On the last command, select a fuel pressure within 34 kPa (5 psi) of the maximum pump pressure and record this fuel pressure. This is the starting pressure at which you will pulse each injector.
4. Command the fuel pump relay ON one more time and energize the fuel injector by depressing the Push to Start Test button on the J 39021 Fuel Injector Coil and Balance Tester at the previously selected pressure.
5. After the injector stops pulsing, select Min from the Display Mode on the CH 48027 Gauge and record the Min pressure. Clear the Min/Max results on the CH 48027 Gauge.
6. Select Normal from the Display Mode on the CH 48027 Gauge.
7. Repeat steps 2 and 4 through 7 for each fuel injector.
8. Subtract the minimum pressure from the starting pressure for one fuel injector. The result is the pressure drop value.
9. Obtain a pressure drop value for each fuel injector.
10. Add all of the individual pressure drop values except for the injector suspected of being faulty. This is the total pressure drop.
11. Divide the total pressure drop by the number of fuel injectors that were added together. This is the average pressure drop. The difference between any individual pressure drop and the average pressure drop should not be more than 20 kPa (3 psi).
12. If the difference between any individual pressure drop and the average pressure drop is more than 20 kPa (3 psi), replace the fuel injector.
Please refer to the MOTOLOGIC CH 47976 Fuel Injector Balance Test User Manual for more detailed instructions and safety information.
Add New Comment