NOTE: This fault is caused by low power on cylinder #4. Motor control module (MCM) adjusts injector pulse for smooth idle – min value reached.
DESCRIPTION:Cylinder #4 engine smoothness control/quantity low.
MONITORED PARAMETER:Cylinder 4 fueling error.
TYPICAL ENABLING CONDITIONS:Engine smoothness control.
MONITOR SEQUENCE:None
EXECUTION FREQUENCY:Continuous when enabling conditions met.
TYPICAL DURATION:Two seconds
DASH LAMPS:MIL
ENGINE REACTION:None
ENTRY CONDITIONS:1. Engine speed is above low idle.2. All cylinders are active, no fault reactions.3. Engine speed/torque is steady.
POSSIBLE CAUSES:1. Drivetrain vibrations.2. Cylinder kit failure.3. Valve train failure.4. Lash adjustments.5. Fuel injector.6. High pressure fuel line (rail to fuel injector).7. Debris entering fuel injector (intermittent faults).
NOTE: This fault is caused by lower power to the cylinder.
PROBABLE CAUSES:1. Cylinder kit failure.2. Valve train failure.3. Lash adjustment.4. Fuel injector.5. High pressure fuel line (rail to injector).6. Debris entering fuel injector (intermittent faults).