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MANIFOLD TUNE VALVE DESCRIPTION The Manifold Tune Valve (2) opens a crossover pas- OPERATION The Powertrain Control Module controls the Manifold Tune Valve Solenoid. The Manifold Tune Valve optimizes REMOVAL 1. Disconnect the negative battery cable. 2. Remove the engine cover. (Refer to 9 - ENGINE/ AIR INTAKE SYSTEM/AIR CLEANER HOUSING - 3. Remove the air injection pump. (Refer to 25 - EMISSIONS CONTROL/AIR INJECTION/PUMP - 4. Disconnect the manifold tune valve harness con- nector at the manifold tune valve solenoid. 5. Disconnect the vacuum line. 6. Remove the left hand air pump switch over valve. (Refer to 25 - EMISSIONS CONTROL/AIR INJEC- 7. Remove the nut retaining the manifold tune valve to the valve rod. 8. Remove the manifold tune valve (2) and the sole- noid (1) from the intake. ZH FUEL INJECTION 14 - 45 |