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same and the lower gage (2) has a higher reading, the active fuel management oil With the engine running and the lower pressure gage (2) measuring above 379 kPa (55 6. Repair, as required. CYLINDER DEACTIVATION (ACTIVE FUEL MANAGEMENT) VALVE LIFTER OIL MANIF Tools Required EN-46999 Active Fuel Management Tester. See Special Tools. EN-46999-1 Active Fuel Management Tester Air Adapter. See Special Tools. EN-46999-5 Active Fuel Management Tester Harness - Small Block V8. See Special Diagnosis and Testing IMPORTANT: Cylinder Deactivation (Active Fuel Management) Valve Lifter A minimum shop air source of 206 kPa (30 psi) is required for A water bleed is located on the side of the EN-46999 . See
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 22: Identifying Displacement On-Demand Tester The manifold bench test provides a maximum 206 kPa (30 psi) of filtered shop air to the manifold Proper operation A stuck open condition - constant air flow A stuck closed condition - no air flow A flow restriction within the manifold
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Individually depress each of the buttons 1-4 on the EN-46999 in order to activate each of the solenoid/valves. See Special Tools. When activating each solenoid/valve, a loud click Button 1 will energize the solenoid/valve 1 for engine cylinder number 1. Button 2 will energize the solenoid/valve 2 for engine cylinder number 4. Button 3 will energize the solenoid/valve 3 for engine cylinder number 6. Button 4 will energize the solenoid/valve 4 for engine cylinder number 7. Fig. 23: Valve Lifter Oil Manifold
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Courtesy of GENERAL MOTORS CORP. 2. Do not lift the manifold assembly by the electrical lead frame. Fig. 24: Displacement-on-Demand Tester Air Adapter 3. Install the EN-46999-1 (1) to the manifold. See Special Tools. 4. Install 2 of the manifold bolts (2) to the EN-46999-1 . See Special Tools. Tighten: Tighten the bolts to 25 N.m (18 lb ft). NOTE: Refer to Fastener Notice .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 1880 1881 1882 1883 ..
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