High Altitude Conversion Package

88chrysler02 Models


1988 SJ & PB Two & Four Wheel Drive Vehicles


Subject


High Altitude Conversion Packages


Index


EMISSIONS


Date

March 21, 1988

No.


25-03-88

P-1080 (C25-01)
Conversion packages are now available to accommodate a customer who wishes to convert his low altitude vehicle for improved high altitude engine performance (4,000 feet above sea level).

Vehicles with low altitude package transferred to service in high altitude areas may exhibit undesirable driveability. The installation of this high altitude conversion package is voluntary and at the owner's expense.

PARTS REQUIRED

Vehicle Engine Transmission Package No.

Ram 50 2WD (PB) 2.0L Manual Only MD121954
Ram 50 2WD (PB) 2.0L Automatic Only MD121955
Ram 50 2WD (PB) 2.6L Both MD121956
Ram 50 4WD (PB) 2.6L Both MD121956
Ram Raider (SJ) 2.6L Both MD121957

FIGURE 1:

CONVERSION PROCEDURE

To improve the above altitude-related condition, the basic timing must be advanced an additional 5~. The correct timing specifications are shown in Figure 1. On vehicles not so equipped, an altitude compensator must be installed to prevent an over-rich condition from occurring.

1. Using the procedure outlined in the appropriate service manual, reset basic timing to the following specifications.

FIGURE 2:

2. Install a dual diaphragm vacuum advance assembly supplied in package as outlined in the appropriate service manual.

3. Install the high altitude compensator (HAC) on device box (solenoid controller) in engine compartment, using two bolt and washer assemblies supplied as shown in Figure 2.









4. Using the appropriate attached diagram, install the vacuum harness assembly supplied in package, and connect hoses to carburetor, HAC (high altitude compensator), and distributor.

NOTE: WHEN INSTALLING THE VACUUM HARNESS, YOU WILL USE THE EXISTING DISTRIBUTOR VACUUM SUPPLY HOSE ALONG WITH THE NEW VACUUM HARNESS TO CONNECT TO THE DUAL DIAPHRAGM DISTRIBUTOR INSTALLED PREVIOUSLY. ALL CONNECTIONS ARE IDENTIFIED WITH COLOR CODING AND ARE ILLUSTRATED ON DIAGRAMS PROVIDED.

FIGURE 3:

5. Install Vehicle Emission Control Information Update Label, PN 4275084, as illustrated in Figure 3.
POLICY: Information only