1986 Mercedes Benz 420sel



April, 3, 2011 AT 6:50 AM

Besides motor mount replacement, what could be the cause for shaky motor? Had tune up recent. Could it be manifold gasket leak or bad fuel injectors?

1 Answer



April, 3, 2011 AT 7:11 AM

Could be misfiring

1.Defective spark plugs
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-

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