2.8 Liter V6 Models - Adjustment Procedures

2. 2.8 LITER V6 MODELS

On 1984 2.8 liter V6-70 Series models originally certified 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 8983 100 009, next to the original label.

These adjustments apply to all 1984 2.8 liter V6-70 Series models originally certified 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 1984 2.8 liter V6-70 Series models originally certified 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 8983 000 010, next to the original label.


These adjustments apply to all 1984 V6-70 Series models that were originally certified 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 retumed to operations at altitudes above 4,000 feet the MCU circuit jumper wire must be reconnected, the ignition timing and engine idle speed must be reset to original specifications and the Vehicle Emission Control Information Update label removed.


Filing Instructions

Record this I.S. Note on page B-187 and file it in your M.R. 244 binder.