Chrysler Full-Size Vans 1989-1998 Repair Guide

Idle Speed and Mixture Adjustments


Idle speed and mixture adjustments on all engines covered in this guide are controlled by the Powertrain Control Module (PCM). No adjustments are necessary.

If idle speed is not within specification, inspect the engine for:

Proper idle speed control actuator functioning
Engine or EGR vacuum leaks
Proper ignition timing
Proper coolant temperature sensor function

If engine functions are normal, perform the idle speed control actuator adjustment, as described in Driveability & Emission Controls .