Running ruff at all RPMs especially under load.

Tiny
KKBUXTON
  • MEMBER
  • 1995 MERCEDES BENZ E320
  • 150,000 MILES
1995 320E runs ruff at all rpms, worse under load. Changed plugs and put a new coil pack in all 3 locations. No change. Check engine ligh is NOT on.
Sunday, November 6th, 2011 AT 5:50 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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, November 6th, 2011 AT 6:10 PM

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