1986 Alliance/Encore, Cherokee/Wagoneer
1. 1986 ALLIANCE/ENCORE 1.4L - 1.7L ENGINES AND SPORTWAGON 2.2L ENGINES1986 Alliance/Encore 1.4L - 1.7L engines and Sportwagon 2.2L engines do not require adjustment. The electronic control systems on these engines have built-in compensating circuits that make necessary adjustments automatically.
2. 1986 CHEROKEE/WAGONEER/COMANCHE 2.8L ENGINES, 2.46L ENGINES WITH THROTTLE BODY INJECTION AND 2.1L TURBO-DIESEL ENGINES
For 1986, only the Cherokee/Wagoneer/ Comanche, 49-State and Canada 2.8L gasoline engine requires adjustment as outlined below. The 1986 49-State and Canada 2.1L TurboDiesel engine, 1986 California 2.8L gasoline engine, and 1986 49-State and California 2.46L engine with throttle body injection do not require adjustment. The fuel metering control systems on these engines have built-in compensating devices that make necessary adjustments automatically. The 2.8L engine adjustments are as follows.
Adjustment - 49-State and Canada 2.8L Engines
On 1986, 49-State and Canada Cherokee/ Wagoneer/Comanche 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, part number EF 8980 000 818, next to the original label.
This adjustment applies to 1986 Cherokee/ Wagoneer/Comanche, 49-State and 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 and Canada 1986 Cherokee/ Wagoneer/Comanche 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, part number EF 8980 000 819, next to the original label.
This adjustment applies to 1986 Cherokee/ Wagoneer/Comanche, 49-State and 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.