2005 Lincoln Aviator Code P0171 Feel M Chasing Ghost Changing Spark Plugs

2005 LINCOLN AVIATOR
115 MILES
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ANONYMOUS
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Code p0171, I feel like I'm chasing a ghost. I was changing the spark plugs and I tested the ohm resistance on each of 8 coils. One was 5234 and the New ones on summit racing advertising6200. Would a reading of 5234 be a problem?
Dec 1, 2012 at 5:29 PM
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ASEMASTER6371
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no, check your vacuum lines. a 171 is a lean code

Roy
Dec 1, 2012 at 5:31 PM
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