Intake Manifold: Service and Repair

1. Disconnect battery ground cable, then drain coolant system into appropriate container.
2. Remove air cleaner.
3. Disconnect following wires:
a. Disconnect ISC solenoid valve and radiator cooling fan thermo switch connectors.
b. On California models, disconnect EGR VSV connectors.
c. Disconnect TPS connector, then the ground wires from intake manifold.
d. Disconnect water temperature sensor and gauge connectors, then the fuel injector connector.
4. Disconnect following hoses:
a. Disconnect vacuum advancer hoses from distributor, then the PCV hose.
b. Disconnect power steering hose and brake booster hose from intake manifold.
c. On California models, disconnect EGR modulator and EGR VSV hoses.
d. Disconnect canister purge hose from intake manifold and pipe.
e. Disconnect fuel feed and return hoses from throttle body.
5. Remove accelerator cable from throttle body.
6. Remove cooling water hoses from intake manifold and throttle body.

Fig. 6 Throttle Body & Intake Manifold Replacement:

7. Remove intake manifold with throttle body from cylinder head, Fig. 6.
8. Reverse procedure to install, noting the following:
a. Use new gasket on intake manifold to cylinder head.

Fig. 5 Intake Manifold Clamps Replacement:

b. Install clamps on manifold, Fig. 5.
c. Tighten bolts and nuts to specification.