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2.3L & 2.5L I4 Tech General discussion of 2.3L and 2.5L I4 Ford Ranger engines.

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Old 06-18-2008
Thread Starter
Join Date: Jun 2008
Location: Paris, IL
Posts: 14
Icon4 PCM and MAF

Does the MAF mitigate the PCM's fuel mixture decision on a 05 ranger? This i chapter 5 of my quest to get rid of my check engine code p0171 an my spark knocking.
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Old 06-18-2008
bruiser's Avatar
Join Date: Apr 2007
Location: lp,Texas
Posts: 482
P0171 System Too Lean (Bank 1)

the MAF sends the readings it get to the pcm and the pcm tells the injectors how much full to use...
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