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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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 26, 2010 at 7:54 AM
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JACOBANDNICKOLAS
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Has the check engine light come on?
Feb 26, 2010 at 12:39 PM
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HAWKEYE60
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yes ,thats when i put new maf and plugs.there was a code of po174 and po171 from a.z.
Feb 26, 2010 at 2:31 PM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
That is a lean mixture on both banks. Have you checked for vacuum leaks?
Feb 26, 2010 at 3:08 PM