SPONSORED LINKS

2004 Ford Expedition idle ruff/stall

Tiny
ADK3BOYS
  • MEMBER
  • 2004 FORD EXPEDITION
  • V8
  • 2WD
  • AUTOMATIC
  • 72,000 MILES
I have a2004 ford expedition 4.6. With 72000 miles. The other day it started to idle very ruff and then stall when at a stop. Check engine came on so I took it to auto zone to read codes. It threw 2 o2 codes. I read on a fourm that if the PCV valve is bad, it can thow false o2 codes. I bought a new PCV. But dont now how to install or where. Also could it just be an issues with the mass air flow sensor or egr? Its seems that it would be rare for two o2 sensors to fail at the same time. Please help
SPONSORED LINKS
Thursday, March 24th, 2011 AT 2:25 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be running too lean due to the following:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.
Was this
answer
helpful?
Yes
No
+1
Thursday, March 24th, 2011 AT 9:11 AM

Please login or register to post a reply.

Related Engine Runs Rough Content

How to Read Codes
VIDEO
How to Read Codes
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links