Engine - High Altitude Modifications
Article No. 85-15-17ALTITUDE (7.5L) - MODIFICATION OF SEA LEVEL CALIBRATIONS FOR ALTITUDE APPLICATIONS
LIGHT TRUCK 1985 E & F250/350 OVER 8500 LBS. GVWR AND EQUIPPED WITH 7.5L ENGINES
CALIBRATIONS: 5-97J-R00, 5-98J-R00
WARNING: This modification is authorized only for the listed engines. Performing this modification on other engine calibrations 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.alt.) may have the following procedure performed to improve performance:
^ Advance the initial timing to 10~ BTDC using the procedure outlined in the 1985 Truck Shop Manual, Volume B.
Vehicle Emission Control Information Update:
^ Obtain a Vehicle Emission Control Information Update Label (available at all Ford or LincolnMercury dealers) and fill in the appropriate information as indicated below.
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 above procedures should be reversed and the Vehicle Emission Control Information Update Label should be removed from the vehicle.
OTHER APPLICABLE ARTICLES: 82-11-14,84-9-21
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: 12127B
TIME: 0.3 Hr.
OPERATION: 12127BS1
TIME: 0.1 Hr. DLR. CODING: Basic Part No. DRIVE - Code: J4
PROGRAM CODE: L05 (The program code is to be entered in the program code box in the Warranty Claim Form 1863).