Shaky motor

Tiny
BABE
  • MEMBER
  • 1986 MERCEDES BENZ 420SEL
  • V8
  • FWD
  • AUTOMATIC
  • 150,000 MILES
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?
Sunday, April 3rd, 2011 AT 6:50 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be misfiring

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

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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Sunday, April 3rd, 2011 AT 7:11 AM

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