High Altitude Conversion Packages

84chrysler4

Models


1984 High Altitude Conversion Packages
- MMC Imported Trucks, Ram-50, Power Ram 50 With Federal Emission System


Subject


High Altitude Conversion Packages


Index


EMISSIONS

Date

April 9, 1984


No..


25-01-84

P-1423-C
A package is now available to accommodate a customer who wishes to convert his 1984 low altitude emission package to the high altitude (over 4,000 feet above sea level) emission package.

Vehicles with the low altitude package transferred to service in high altitude areas may exhibit undesirable driveability. However, the installation of a high altitude conversion package is voluntary and at the customer's expense.

The high altitude field conversion packages and procedures outlined below have been authorized in the following 1984 non-altitude equipped engine families in service at altitudes above 4,000 feet above sea level.

CONVERSION INSTRUCTIONS

Sea Level to High Altitude

Altitude performance improvement adjustments for 1984 model year Ram-50 and Power Ram-50 trucks are as follows:

Gasoline Fueled Vehicles

1. Advance basic timing as outlined below using the procedure in the 1984 Ram-50 service manual.

Engine Low Altitude High Altitude

2.0L 5~ +/- 2~ BTDC 10~ +/- 2~ BTDC
2.6 L (All) 7~ +/- 2~ BTDC 12~ +/- 2~ BTDC

2. Remove air cleaner cover from the air cleaner assembly.

FIGURE 1:

FIGURE 2:

3. Replace carburetor main (primary) air jet with jet supplied in the respective kit (Figure 1). Be sure to use the proper screwdriver (Figure 2).
4. Reinstall air cleaner cover.

FIGURE 1:

FIGURE 6:

5. Install emission control information update label supplied in kit (Figure 1) to properly cleaned location on the hood as indicated in Figure 6.
High Altitude to Low Altitude

Performance Adjustments

The following procedure applies to vehicles returned to service at low altitude (below 4,000 feet above sea level) which previously had the high altitude kit installed. This procedure does not remove any components installed in high altitude kit.

1. Remove complete air cleaner assembly from engine (cover and filter housing).

FIGURE 4:

2. Remove jet air bypass screw "B" and install screw "A" from low altitude kit PN MD080351 (Figure 4). Place screw "B" in owners manual packet in glove compartment for reinstallation if vehicle is returned to high altitude operation at a later date.
3. Reinstall air cleaner assembly.

FIGURE 3:

FIGURE 6:

4. Install low altitude emission control update label supplied in kit, PN MD080351, to properly cleaned location on the hood as indicated in Figure 6. (Do not remove high altitude emission update label.)

5. Check the ignition timing and curb idle RPM according to the specified timing and idle setting procedure per the 1984 D-50, Power Ram-50 Truck service manual.

FIGURE 5:

IMPORTANT: SHOULD THE VEHICLE BE RETURNED TO SERVICE AT HIGH ALTITUDE (ABOVE 4,000 FEET ABOVE SEA LEVEL), SCREW "A" SHOULD BE REMOVED AND SCREW "B" REINSTALLED AND THE LOW ALTITUDE EMISSION UPDATE LABEL SHOULD BE REMOVED.
Diesel Power Vehicles

Vehicles taken from low altitude service to high altitude service should have the injection timing advanced from 5~ +/- 2~ ATC to 3~ +/- 2~ ATC.

Use injection timing procedure outlined in 1984 Ram-50, Power Ram-50 service manual, publication #81-370-4009, pages 14-26 through 14-28.

POLICY: Information only