Symptom Table - Engine-Speed Related Vibrations

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When an engine-speed related vibration is present, engine, engine accessory and engine firing calculations should be carried out.

NOTE: Any assembly that is out of balance will only cause a first order vibration, it will not cause a higher order vibration.

NOTE: Some engine-speed related vibrations are normal though they should not be felt in the passenger compartment.

SYMPTOM TABLE - ENGINE-SPEED RELATED VIBRATIONS

Condition	Possible Sources	Action
0.5 order engine vibration	Engine	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
First through sixth order engine vibration	Engine	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Transmission/transaxle	Refer to the appropriate article in AUTOMATIC TRANSAXLE/TRANSMISSION - 6F35 , AUTOMATIC TRANSAXLE/TRANSMISSION - AISIN AW21 , AUTOMATIC TRANSMISSION - AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) - FUSION, MILAN & MKZ (HYBRID) for the procedure. Refer to the appropriate article in MANUAL TRANSMISSION - MANUAL TRANSAXLE/TRANSMISSION & CLUTCH - GENERAL INFORMATION for the procedure. GO to the SYMPTOM TABLE in the appropriate service information.
	Engine mounts	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Transmission/transaxle mounts	Refer to the appropriate article in AUTOMATIC TRANSAXLE/TRANSMISSION - 6F35 , AUTOMATIC TRANSAXLE/TRANSMISSION - AISIN AW21 , AUTOMATIC TRANSMISSION - AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) - FUSION, MILAN & MKZ (HYBRID) for the procedure. Refer to the appropriate article in MANUAL TRANSMISSION - MANUAL TRANSAXLE/TRANSMISSION & CLUTCH - GENERAL INFORMATION for the procedure. GO to the SYMPTOM TABLE in the appropriate service information.
	Exhaust system	REFER to EXHAUST SYSTEM -- FUSION, MILAN & MKZ article.
Belt driven accessory speed vibration	Engine pulley	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Coolant pump	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Generator	REFER to CHARGING SYSTEM -- FUSION, MILAN & MKZ article.
	A/C compressor	REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION & DIAGNOSTICS -- FUSION, MILAN & MKZ (EXCEPT HYBRID) article.
	Power steering pump	REFER to STEERING SYSTEM - HYDRAULIC POWER ASSIST STEERING (HPAS) article.
	Vacuum pump	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Accessory drive belt	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.