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INJECTOR_BALANCE_TEST

If injectors are suspected of being dirty, they should be cleaned using an approved tool and procedure prior to performing this test. The fuel pressure test, should be completed prior to this test.

Step 1.
If engine is at operating temperature, allow a 10 minute "cool down" period then connect the fuel pressure gauge and injector tester.

1. Ignition "OFF"
2. Connect fuel pressure gauge and injector tester.
3. Ignition "ON"
4. Bleed off air in gauge. Repeat until air is bled from gauge.


Step 2.
Run test.
1. Ignition "OFF" for 10 seconds.
2. Ignition "ON".  Record gauge pressure. (Pressure must hold steady). If the pressure does not hold steady then it might have a failing fuel pump or leak somewhere.
3. Turn injector on, by depressing button on injector tester, and note pressure at the instant the gauge needle stops.

Step 3.
1. Repeat step 2 on all injectors and record pressure drop on each injectors.
2. Retest injectors that appear faulty (Any injectors that have a 10 kPa or 1.5 PSI difference, either more or less, in pressure from the average). If no problem is found, other problem may lie in the fuel injectors wiring harness or the ECM itself.

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