Mechanics

RUNNING RUFF AT ALL RPMS ESPECIALLY UNDER LOAD.

1995 Mercedes Benz 320e • 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.
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Kkbuxton
November 6, 2011.




http://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-

Tiny
Rasmataz
Nov 6, 2011.


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