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My engine doesn't idle properly

Tiny
ZENDERK
  • MEMBER
  • 2001 FORD MONDEO
  • 119,500 MILES
I have a ford mondeo 2.5l V6, my engine doesn't idle properly, It cab't find it's idling position. The it's cold and the cold valve is working there is no problem. I have replaced the throttle body cleaned out the air intake and made sure that all the pipes are secure. Now I'm getting a fault code - system is to lean. Can you please advise me
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Monday, March 12th, 2012 AT 4:56 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks

2. EGR and PCV valve.

3. Low fuel pressure.

4. Dirty fuel injectors.

5. Mass Air Flow Sensor.

6. Oxygen Sensor.
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Monday, March 12th, 2012 AT 7:14 PM
Tiny
ZENDERK
  • MEMBER
  • 2 POSTS
Now I have a fault code P0174 - system is too lean on bank 2, maybe that can narrow down the faults?
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Tuesday, March 13th, 2012 AT 12:58 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the above suggestion for a lean condition
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Tuesday, March 13th, 2012 AT 1:09 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Have the compression tested. Check the valve timing to see if the cams are lined up correctly.
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Tuesday, March 13th, 2012 AT 1:13 PM

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