Grand AM L4-138 2.3L VIN A MFI (1992)
Intake Manifold: Service and Repair
1. Disconnect battery ground cable, then drain coolant to appropriate level.
2. Disconnect vacuum hose and electrical connector from MAP sensor.
3. Disconnect electrical connectors from the MAP sensor, MAT sensor, purge solenoid and fuel injector harness and position aside, then disconnect
hoses from intake manifold and hose at fuel regulator and purge solenoid to canister.
4. Disconnect air cleaner to throttle body duct.
5. Disconnect vent tube to air cleaner duct.
6. Remove throttle cable bracket, then disconnect power brake unit vacuum hose with retaining bracket to power steering bracket and position aside.
7. Disconnect coolant lines from throttle body.
8. Remove oil/air separator, leaving hoses attached to the separator. Disconnect hoses from the oil fill, chain housing, chain cover, intake duct and
intake manifold and remove as an assembly.
9. Remove oil fill cap and dipstick assembly, then pull oil fill tube upward to unseat from engine block.
10. Disconnect injector wiring harness connector.
11. Remove oil fill tube out top, rotating as necessary to gain clearance for oil/air separator nipple between intake tubes and fuel rail electrical harness.
Fig. 8 Intake Manifold Brace Removal. 1989-91
Fig. 9 Intake Manifold Brace Removal. 1992
