Altitude Performance Adjustments: Overview

87amcjeep04

7E308

1987 Jeep Wrangler/YJ
Equipped With 2.46L (TBI)
or 4.2L Engines

SEPTEMBER 1987

ENGINE Attention: Workshop, Parts Department


ALTITUDE PERFORMANCE ADJUSTMENTS

This I.S. Note outlines adjustments for improved engine performance on 1987 Jeep Wrangler/YJ vehicles, equipped with 2.46L (TBI) or 4.2L engines, being operated at altitudes above or below that which the engine was originally certified.


When necessary, perform the engine adjustments outlined in the adjustment procedure portion of this I.S. Note.


Any such vehicles so adjusted, must have the Vehicle Emission Control Information Update Label attached next to the original Vehicle Emission Control Information label.


The adjustment procedures and update labels must be made available at no cost to independent repair facilities and to the general public.


Owner Notification


A notification is provided in the current Owner's Manuals to make customers aware of these adjustments.


Vehicle Emission Control Information Label


The Vehicle Emission Control Information Update labels are available from:


MYRIAD SERVICES
8835 General Drive
Plymouth, MI 48170
1-800-AMC-CARS Operator 43