2002 Ford Windstar po171 and po173

2002 FORD WINDSTAR
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RONALD333
  • MEMBER
  • 8 POSTS
Engine Performance problem
2002 Ford Windstar 6 cyl Front Wheel Drive Automatic 120ooo miles

my scanner says system too lean bank 1 and 2 and my engine pings unless i use really high octane gas. also engine light on. do you have any ideas on what to check. thanks ron...I cannot donate at this moment because my credit card is full. but I will. I have donted before on another problem
Apr 29, 2009 at 10:23 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Lean condition:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)
Apr 29, 2009 at 10:56 PM
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