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System to lean

Tiny
SICWITIT
  • MEMBER
  • FORD EXPEDITION
Hello, I have a 1999 Ford Expedition, and sometimes it is idle to low to stay running. It stalls and sputters. I have to keep my foot on the gas to keep it running. If I drive it for or while or keep my foot on the gas for a way it will idle properly. I am not sure what the problem is. It is driving me crazy. I had the codes read and I got EGR and system to lean. Do I need an Idle Air Control Valve, EGR Sensor, both, or what? Please help I am at the end of my rope.
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Monday, January 16th, 2006 AT 8:52 PM

3 Replies

Tiny
DB554
  • MECHANIC
  • 35 POSTS
Sounds like you need an air idle control valve
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Tuesday, January 17th, 2006 AT 4:02 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
IAC wont make the system lean O2 sensors or most likely the Mass Airflow Meter
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Wednesday, January 18th, 2006 AT 4:56 PM
Tiny
SICWITIT
  • MEMBER
  • 2 POSTS
Do I need to replace all the O2 sensors, or is there away to find out exactly which one is bad? If so please let me know. Thanks for everyone's help. I really needed it.
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Friday, January 20th, 2006 AT 9:22 PM

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