1999 ford f150 code 172-175 system fuel too rich in bank 1&2

1999 FORD F-150
135,000 MILES
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DARYL0101
  • MEMBER
  • 1 POST
how can I fix it
Oct 31, 2011 at 1:39 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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.
Oct 31, 2011 at 11:57 AM
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