2004 GMC

Tiny
WOLFDOG
  • MEMBER
  • 2004 GMC SIERRA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 44,758 MILES
I have check engine light code p10172-p10175 engine runs rich. Bad gas mileage. Change mass air flow sensor did not help. Any suggestions thanks
Sunday, January 16th, 2011 AT 7:58 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1. Excessive fuel pressure can be cause by restricted fuel return line
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, March 16th, 2011 AT 2:39 AM

Please login or register to post a reply.

Related Mass Air Flow Sensor Replace/Remove Content

Mass Air Flow Sensor Replacement
GUIDE
Mass Air Flow Sensor Replacement
After starting the engine post sensor replacement, the sensor instantly calibrates itself so there is no learn time required. This sensor is subject to debris and ...
VIEW MORE

Sponsored links