High Altitude Driveability Modifications
Article No. 82-11A-1O
June 4, 1982
Subject:
Modification Of Sea Level Calibrations For Altitude Applications
Light Trucks
1982 Courier - All Except 2.0L High Altitude Calibration
Applicable Model:
WARNING:
This Modification Is Authorized Only For The Listed Engines. Performing This Modification On Other Engines Is Unauthorized And Could Create Liability Under Applicable Federal Or Local Laws.
Customers who may have relocated and/or continually operate the subject vehicles in high altitudes (above 4,000 ft. altitude) may have the following procedures performed to improve performance:
1. Remove the air cleaner and duct assembly.
2. Remove the bolts attaching the accelerator shaft to the throttle lever.
3. Disconnect the fuel line and fuel return line at the carburetor.
4. Disconnect the leads for the slow fuel cut valve (throttle solenoid) and coasting richer (deceleration valve) (2.3 litre only) at the quick disconnects. Also, disconnect the carburetor-to-distributor vacuum line at the carburetor. Disconnect the hose connecting the carburetor to the vacuum amplifier. Disconnect the vacuum hose for the purge control valve.
5. Disconnect the throttle return spring (2.3 litre only). Then, disconnect the lead wire for the automatic choke. Remove the servo diaphragm link for the throttle opener (2.0 litre only).
6. Using Tool T72J-9510, remove the carburetor attaching nuts from the intake manifold studs and remove the carburetor.
7. Remove the locking plate (only for Courier 2.3 litre and Courier chassis cab).
8. Remove the plugs and main jets from the carburetor.
Figure 7:
9. Install the high altitude jets indicated in the table (Figure 7.)
10. Install the plugs.
11. Install the locking plate (only for Courier 2.3 litre and Courier chassis cab).
12. Position the carburetor and a new gasket on the intake manifold and install the attaching nuts.
13. Connect the throttle return spring (2.3 litre only).
14. Connect the accelerator shaft to the throttle lever and install the attaching bolts.
15. Connect the slow fuel cut valve, automatic choke, and coasting richer (2.3 litre only) leads at the quick disconnect.
16. Connect the carburetor-to-distributor vacuum line. Connect the vacuum hose for the purge control valve.
17. Connect the fuel line and fuel return line to the carburetor. Install the air cleaner and duct assembly.
18. Start the engine and check for fuel leaks.
19. For 2.3 litre California Courier with manual transmission, adjust the dash pot as per "1981 Ford Courier Truck Shop Manual", Deceleration Control System, Section 29-03-05.
20. For 2.0 litre Courier, adjust the throttle positioner system as per "1981 Ford Courier Truck Shop Manual", Deceleration Control System, Section 29-03-06.
Install a Courier Vehicle Emission Control Information Update Label (available at all Ford or Lincoln-Mercury dealers) in a prominent place adjacent to the Vehicle Emission Control Information Label. Do not install the label on any component that can be easily detached from the vehicle. Clean the area before installing the label.
Vehicle Emission Control Information Update Label for Low Altitude Adjustment:
This label is attached firmly to a readily visible position and beside to the existing vehicle emission control information label,
Do not Install the label on any equipment that can be easily detached from the vehicle.
NOTE:
The Vehicle Emission Control Information Update Label is a new label to be used for altitude modifications.
Do not Use the Authorized Modifications label which is used to indicate other types of modifications. If the vehicle is returned to continuous sea level (below 4,000 ft. alt.) operation, the Vehicle Emission Control Information Update Label should be removed. Install the low altitude jets and make the required adjustments.
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION/TIME: "Actual Time" as defined in the Warranty and Policy Manual.
DLR. Coding:
Basic Part No. Code:
L05 53