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MANIFOLD-INTAKE DIAGNOSIS AND TESTING INTAKE MANIFOLD LEAKS An intake manifold air leak is characterized by lower than normal manifold vacuum. Also, one or more cylinders may WARNING: USE EXTREME CAUTION WHEN THE ENGINE IS OPERATING. DO NOT STAND IN A DIRECT LINE 1. Start the engine. 2. Spray a small stream of water (Spray Bottle) at the suspected leak area. 3. If engine RPM’S change, the area of the suspected leak has been found. 4. Repair as required. REMOVAL LOWER INTAKE MANIFOLD WARNING: RELEASE FUEL SYSTEM PRESSURE BEFORE SERVICING SYSTEM COMPONENTS. SERVICE 1. Remove engine cover. 2. Perform fuel system pressure release procedure before attempting any repairs (Refer to 14 - FUEL SYSTEM/ FUEL DELIVERY - STANDARD PROCEDURE). 3. Remove air cleaner housing. 4. Disconnect negative battery cable. 5. Disconnect fuel line at rail. 6. Remove fuel injector electrical connectors. 7. Remove fuel rail retaining bolts and remove fuel rail. 8. Disconnect oil temperature sensor. 9. Disconnect variable valve timing solenoid electrical connector. 10. Disconnect intake camshaft position sensor electrical connector. 11. Position harness out of the way. 12. Remove throttle body support bracket. 13. Disconnect electronic throttle control electrical connector. 14. Remove wiring harness retainer from the intake manifold. 15. Disconnect MAP sensor electrical connector. 16. Disconnect vacuum lines at intake. 17. Remove upper radiator hose retaining bracket. 18. Remove intake manifold retaining bolts. 19. Remove intake manifold. PM ENGINE 2.0L WORLD 9 - 1639 |