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1997 Mercedes Benz E420 car feels rough

Tiny
CARMEN742
  • MEMBER
  • 1997 MERCEDES BENZ E420
  • V8
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
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
Friday, April 2nd, 2010 AT 8:35 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Saturday, April 3rd, 2010 AT 6:35 AM

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