Engine Idle Speed Check

Including Throttle Positioner Application

If the idle speed is too low, the engine will run rough. An idle speed that is too high will cause the vehicle to creep, have harsh engagements, and harsh closed throttle downshifts.

Check and if necessary adjust the engine idle speed with the throttle positioner (if applicable) or the injection pump linkage adjustment. Refer to the Powertrain Control/Emissions Diagnosis Manual for the appropriate procedure according to throttle positioner application.