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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 1. Disconnect negative cable from battery. 2. Remove resonator assembly and air inlet hose. 3. Disconnect throttle and speed control cables. 4. Disconnect electrical connectors for the following components: Refer to FUEL SYSTEM for component locations. • Manifold Absolute Pressure (MAP) Sensor • Intake Air Temperature (IAT) Sensor • Throttle Position (TPS) Sensor • Coolant Temperature (CTS) Sensor • Idle Air Control (IAC) Motor 5. Disconnect vapor purge hose, brake booster hose, speed control servo hose, positive crankcase ventilation (PCV) hose. 6. Disconnect generator electrical connections. 7. Disconnect air conditioning compressor electrical connections. 8. Disconnect left and right radio suppressor straps. 9. Disconnect and remove ignition coil towers. 10. Remove top oil dipstick tube retaining bolt and ground strap. 11. Bleed fuel system (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE). 12. Remove fuel rail. 13. Remove throttle body assembly and mounting bracket. 14. Drain cooling system below coolant temperature level (Refer to 7 - COOLING - STANDARD PROCEDURE). 15. Remove the heater hoses from the engine front cover and the heater core. 16. Unclip and remove heater hoses and tubes from intake manifold. 17. Remove coolant temperature sensor (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT TEMP SENSOR - REMOVAL) . 18. Remove intake manifold retaining fasteners in reverse order of tightening sequence. 19. Remove intake manifold. 9 - 862 ENGINE - 3.7L SERVICE INFORMATION ND |