p0171
05-14-2008, 05:54 PM
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p0171 have this code on my 3.8l impala i had the maf ends of the stock maf ported but the car has driven this way problem free for 2 weeks and many miles any suggestions will help.I already checked for air leaks after the maf and there are none possible bad o2 sensor????
05-15-2008, 08:28 PM
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I've seen on some Fords when using a "performance" air filter (not oil charged), they would create more velocity of the incoming air which made the car throw lean codes. If available I would try a stock MAF and see what it does. I also agree, weird it went two weeks. Which kind of makes me think it could be the porting.
