One problem related to engine has been reported for the 1996 Mitsubishi Montero. The most recently reported issues are listed below.
The butterfly valve in the intake plenum in the 3. 5l dohc comes loose and drops into the motor which can cause it to stop suddenly, this problem is known by the manufacturer, which is apparent because they have made a replacement part to fix it; however, it is expensive and they do not help with the cost.