Mitsubishi Pick-ups and Montero 1983-1995 Repair Guide

High Altitude Compensation System


The diesel trucks sold as Federal specification low altitude vehicles will meet the Federal high altitude requirements with no adjustments required. Trucks sold for principal use in high altitude areas are adjusted by the dealer in order to reduce levels of visible smoke and soot. The adjustment involves re-calibrating the injection timing from 5° ATDC to 3° ATDC.