F 250 2WD Pickup V8-302 5.0L VIN N FI (1985)
Intake Manifold: Service and Repair
Upper Intake Manifold
Pre-Service Procedures
The fuel charging assembly consists of the air throttle body, and the upper and lower intake manifolds. Prior to service or removal of the fuel charging
assembly, the following steps must be taken:
1. Open hood and install protective covers.
2. Disconnect negative battery lead and secure it out of the way.
3. Remove fuel cap at tank pressure.
4. Release pressure from fuel system.
Removal
1. Disconnect electrical connectors at air bypass valve, Throttle Position Sensor (TPS) and Exhaust Gas Recirculation (EGR) Position Sensor.
2. Disconnect throttle linkage at throttle ball and Automatic Overdrive (AOD) transmission linkage from throttle body. Remove two bolts securing
bracket to intake and position bracket with cables out of way.
3. Disconnect upper intake manifold vacuum fitting connections by disconnecting all vacuum lines to vacuum tree, vacuum lines to EGR valve, and
vacuum line to fuel pressure regulator.
4. Disconnect Positive Crankcase Ventilation (PCV) system by disconnecting hose from fitting on rear of upper manifold.
5. Remove two canister purge lines from fittings on throttle body.
6. Disconnect EGR tube from EGR valve by removing flange nut.
7. Remove bolt from upper intake support bracket to upper manifold.
8. Remove six upper intake manifold retaining bolts.
9. Remove upper intake and throttle body as an assembly from lower intake manifold.
Installation
