1997 Mercedes Benz E420 car feels rough

1997 MERCEDES BENZ E420
140,000 MILES • V8 • 2WD • AUTOMATIC
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CARMEN742
  • MEMBER
  • 1 POST
i had a fuel sensor put in two days ago. today, my car all of a sudden idles rough when in park and feels like it just wants to cut off when i am at a stop. i don't know what to do
Apr 2, 2010 at 8:35 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Engine running rough or misfiring can be cause by the following-inspect and test all the following below:
1.Defective spark plug.
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.Idle air control valve.
Apr 3, 2010 at 6:35 AM
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