2001 Ford F150 IDLE LOPE IN COLD TEMP

2001 FORD F-150
177,775 MILES • V8 • 4WD • AUTOMATIC
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HAWKEYE60
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  • 2 POSTS
T RUCK LOPES WHILE IDLING IN COLD WEATHER. CHANGED MAF SENSOR AND NEW PLUGS. HELPED BUT STILL LOPES NOT QUITE AS BAD . WHAT ELSE SHOULD I CHECK?
Feb 25, 2010 at 11:54 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Has the check engine light come on?
Feb 26, 2010 at 4:39 AM
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HAWKEYE60
  • MEMBER
  • 2 POSTS
yes ,thats when i put new maf and plugs.there was a code of po174 and po171 from a.z.
Feb 26, 2010 at 6:31 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
That is a lean mixture on both banks. Have you checked for vacuum leaks?
Feb 26, 2010 at 7:08 AM
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