Eagle L4-150 2.5L (1983)
and engine idle speed reset to the specifications indicated on this same label. In addition, a jumper wire must be added to the MCU circuit to activate the
altitude compensating circuit in the MCU.
1.
Move the carpeting away from the passenger front seat toeboard to expose the MCU harness.
2.
Untape the two-terminal connector from the MCU harness.
3.
Connect jumper wire, P/N 318 6890, to the two-terminal connector and reinstall the carpet.
4.
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.
5.
Install Vehicle Emission Control Information Update label, part number 89 83 100 009, next to the original label.
These adjustments apply to all 1983 six-cylinder and 2.46L four-cylinder AMC 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 MCU circuit jumper wire must be removed, the ignition
timing and engine idle speed must be reset to original specifications and the Vehicle Emission Control Information Update label removed.
On 1983 six-cylinder and 2.46L four-cylinder AMC 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. In addition, the MCU circuit jumper wire must be disconnected and taped to the MCU
harness.
1.
Move the carpeting away from the passenger front seat toeboard to expose the MCU harness.
2.
Disconnect the jumper wire from the two-terminal connector in the MCU harness and tape the connector securely to the harness.
3.
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.
4.
Install Vehicle Emission Control Information Update label, part number 89 83 100 010, next to the original label.
These adjustments apply to all 1983 six-cylinder and AMC 2.46L four-cylinder AMC 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 returned 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
File this I.S. Note in the plastic binder supplied with Supplement No. 1 to the 1982 AMC Technical Service Manual.
