mike340duster
New Member
- Joined
- May 4, 2011
- Messages
- 2
- Reaction score
- 0
- City, State
- Milwaukee, WI
- Year, Model & Trim Level
- 99 mountaineer 5.0
This is my first post on this site. I figured I would try here since your great member posts helped me to fix my vibration in my Mountaineer due to lack of friction modifier in the rear differential.
Here's my problem, the Mountaineer says it's running rich on both banks. PO172 and PO175. I just had it in the shop for two days and they couldn't seem to find the issue. Here is the list of the items they checked the air filter, PCV valve, looked for vacuum leaks, DPFE sensor, O2 sensors, Mass airflow sensor, EGR valve, fuel pressure( a little high at 70 psi koeo), fuel pressure regulator not leaking, and regulator is discontinued from Ford and N/A from Napa.
I'm at a loss here. Has anyone experienced a similar problem? I know I'll never pass emissions this way. My Moutaineer is a 99 with the 5.0 and is AWD. It currently has like 184k miles but runs great and doesn't burn a drop of oil. Any help would be greatly appreciated and Thanks in advance.
Here's my problem, the Mountaineer says it's running rich on both banks. PO172 and PO175. I just had it in the shop for two days and they couldn't seem to find the issue. Here is the list of the items they checked the air filter, PCV valve, looked for vacuum leaks, DPFE sensor, O2 sensors, Mass airflow sensor, EGR valve, fuel pressure( a little high at 70 psi koeo), fuel pressure regulator not leaking, and regulator is discontinued from Ford and N/A from Napa.
I'm at a loss here. Has anyone experienced a similar problem? I know I'll never pass emissions this way. My Moutaineer is a 99 with the 5.0 and is AWD. It currently has like 184k miles but runs great and doesn't burn a drop of oil. Any help would be greatly appreciated and Thanks in advance.