F 150 2WD Pickup V8-351 5.8L Lightning (1993)
Throttle Body: Service and Repair
REMOVAL
1. Disconnect negative battery cable and remove snow/ice shield.
NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control
module relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the adaptive strategy.
2. Remove air intake tube.
3. Remove PCV fresh air hose from throttle body and oil fill tube.
4. Disconnect electrical connectors from throttle position sensor and idle air control valve.
5. Loosen radiator cap to relieve cooling system pressure (allow engine to cool first). Remove and plug cooling system hoses from EGR spacer.
6. Remove AIRB/AIRD bracket attaching nuts then remove bracket from the EGR spacer and move out of the way.
7. Remove the throttle body attaching nuts and throttle cable bracket.
NOTE: Some coolant may be lost from the EGR spacer when throttle body is removed.
8. Separate the throttle body from the EGR spacer.
9. Disconnect the throttle cable at throttle ball stud, then remove the throttle body from vehicle.
CAUTION: When disconnecting throttle cable from ball stud, use a screwdriver or similar tool close to the stud and pry slowly. Pulling by hand
may damage the cable.
10. Remove the EGR spacer from the upper intake manifold.
INSTALLATION
1. Ensure that both throttle body and upper intake manifold gasket surfaces are clean.
NOTE: If scraping is necessary, be careful not to damage gasket surfaces of throttle body and upper manifold assemblies, or allow material to
drop into manifold.
2. Install a new EGR spacer gasket onto the studs and install the EGR spacer.
3. Connect the throttle cable to the throttle body.
4. Install a new throttle body gasket on the four studs of the upper intake manifold.
5. Install the throttle body. Tighten the nuts to 17-24 Nm (12-18 lbs ft).
6. Connect the throttle cable bracket.
7. Connect the cooling hoses to the EGR spacer and secure with hose clamps.
8. Position the AIRB/AIRD bracket to the EGR spacer and install attaching nuts.
9. Connect the electrical connectors to the throttle position sensor and the idle air control valve.
10. Connect the PCV fresh air hose to the throttle body and to the oil fill tube.
11. Check and fill the cooling system as needed.
12. Install the snow/ice shield and air intake tube.
13. Connect the negative battery cable. Start the engine and check for proper operation.