2.1985 Cherokee/Wagoneer 70 Series 2.8L Gasoline and 2.1L Diesel Engines

For 1985, only the Cherokee/Wagoneer, 70 Series, 49-State/Canada 2.8L gasoline engine requires adjustment as outlined below. The 1985 49-State/Canada and California 2.1L diesel engine and 1985 California 2.8L gasoline engine do not require adjustment. The fuel metering control systems on these engines have built-in compensating devices that make necessary adjustments automatically.


49-State/Canada 2.8L Engine Adjustment


On 49-State/Canada (ONLY) 1985 Cherokee/ Wagoneer 70 Series 2.8L models sold for operation at altitudes below 4,000 feet that are being operated above 4,000 feet, the ignition timing as shown on the original Vehicle Emission Control Information label in the engine compartment, should be advanced 7~ and engine idle speed reset to the specifications indicated on this same label.


1. Advance ignition timing 7~ from the setting indicated on the original Vehicle Emission Control Information label and reset engine idle speed to the setting indicated on the same label.


2. Install Vehicle Emission Control Information Update label, P/N EF 8980 000 743, next to the original label.

This adjustment applies to 1985 Cherokee/ Wagoneer, 49-State/Canada 2.8L models that were originally sold for principal use at altitudes below 4,000 feet. Refer to the Vehicle Emission Control Information label in the engine compartment to identify these vehicles.


NOTE: Whenever these vehicles are returned to operation at altitudes below 4,000 feet, the ignition timing and engine idle speed must be reset to original specifications and the Vehicle Emission Control Information Update label removed.


On 49-State/Canada (ONLY) 1985 Cherokee/ Wagoneer 70 Series 2.8L models sold for operation at altitudes above 4,000 feet that are being operated below 4,000 feet, the ignition timing as shown on the original Vehicle Emission Control Information label in the engine compartment should be retarded 7~ and engine idle reset to the specification indicated on this same label.


1. Retard ignition timing 7~ from the setting indicated on the original Vehicle Emission Control label and reset engine idle speed to the setting indicated on this same label.


2. Install Vehicle Emission Control Information Update label, P/N EF 8980 000 744, next to the original label.


This adjustment applies to 1985 Cherokee/ Wagoneer, 49-State/Canada 2.8L models that were originally sold for principal use at altitudes above 4,000 feet. Refer to the Vehicle Emission Control Information label in the engine compartment to identify these vehicles.


NOTE: Whenever these vehicles are returned to operation at altitudes above 4,000 feet, the ignition timing and engine idle speed must be reset to original specifications and the Vehicle Emission Control Information Update label removed.