Intake Manifold: Service and Repair

1. Disconnect battery ground cable, then drain cooling system.
2. Disconnect the following hoses:
a. Disconnect AFM and PCV hoses.
b. Disconnect cylinder head breather and brake booster hoses.
c. On California models, disconnect A/C VSV, EGR modulator and EGR vacuum valve hoses.
d. On all models, disconnect canister purge hose from canister, then vacuum hose from fuel pressure regulator.
3. Disconnect the following electric wires:
a. Disconnect ISC solenoid valve and canister purge VSV connectors.
b. On California models, disconnect REGTS and EGR VSV connectors.
c. On all models, disconnect TPS connector, then the ground wires from intake manifold.
4. Remove accelerator cable from throttle valve lever and bracket.
5. Remove cooling water hoses from air valve and throttle body.
6. Remove alternator adjusting arm stiffener.

Fig. 4 Replacing Throttle Body & Intake Manifold:

Fig. 5 Installing Intake Manifold Clamps:

7. Remove intake manifold bracket, then intake the manifold with throttle body from cylinder head, Fig. 4.
8. Reverse procedure to install noting the following:
a. Use new gasket on intake manifold to cylinder head.
b. Install clamps on manifold as shown in Fig. 5.
c. Torque all bolts and nuts to specifications.