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subtracting the second pressure reading from the first pressure reading. Fuel Injector Balance Test with Tech 2 Step Action Values Yes No Schematic Reference:Engine Controls Schematics 1 Did you perform the Diagnostic System Check - - Go to Step 2 Go to Diagnostic System Check - Engine Controls 2 Did you perform the Fuel Injector Coil Test? - Go to Step 3 Go to Fuel Injector Coil Test 3 1. Turn OFF the ignition. 2. Turn OFF all accessories. 3. Install the fuel pressure gauge. Refer to Fuel Pressure Gauge Installation and 4. Turn ON the ignition, with the engine OFF. 5. Command the fuel pump ON with a scan tool. 6. Observe the fuel pressure gauge, with the fuel pump commanded ON. Is the fuel pressure within the specified value? IMPORTANT: Do not perform this test if the engine coolant IMPORTANT: Verify there is adequate fuel in the fuel tank IMPORTANT: z You may need to command the fuel z Do not start the engine. 385-425 kPa (55-62 psi) VIN: (V, T, U) Gasoline 335-375 kPa (48-54 psi) VIN: Z Ethanol Go to Step 4 Go to Fuel System Diagnosis IMPORTANT:
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls (Troubleshooting) - 4.8L, 5.3L, and 6.0L - Hummer H2
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