Intake Manifold: Service and Repair

Fig. 5 Fuel Pressure Bleed:

1. Disconnect battery ground cable, then drain engine coolant.
2. Remove air cleaner assembly, then disconnect fresh air hose at cam cover.
3. Remove PCV hose.
4. Connect tool No. SA9127E to fuel pressure, Fig. 5, when fuel line is disconnected wrap with suitable cloth before disconnecting.
5. Install fuel bleed hose to suitable container, then open valve to bleed system, once pressure is bleed. remove tool.
6. Remove fuel line bracket bolt, then using tool No. SA9157E or equivalent, disconnect fuel supply and return lines.
7. Disconnect throttle cable from throttle body, then remove bracket attaching nuts.
8. Disconnect the following electrical connectors:
a. Fuel injectors.
b. Idle air control (IAC).
c. Throttle position sensor (TPS).
d. EGR valve.
e. Manifold absolute pressure sensor.
9. Remove wires with tubes, the position harness onto fuel relay.
10. Disconnect and label TBI tube module assembly vacuum hoses.
11. Disconnect heater hose, then remove cylinder head coolant outlet de-aeration line fitting and clamps, then position aside.
12. Remove intake manifold support bracket to block attaching bolt, then remove accessory drive belt.
13. Remove power steering pump attaching bolts, then position aside.
14. Remove intake manifold attaching nuts, then remove manifold and gasket.

Fig. 6 Intake Manifold Tightening Sequence. SOHC:

15. Reverse procedure to install. Tighten intake manifold attaching nuts to specifications in sequence, Fig. 6.