Thread: P0171 and P0174, base engine
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Old Feb 25, 2020 | 09:52 AM
  #15 (permalink)  
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zip439
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Joined: Jul 2010
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From: SE Alabama
Default Re: P0171 and P0174, base engine
Check EVAP system and gas cap for good seal?
You replaced all four O2 sensors??
maybe the throttle plate isn't closing far enough?
 
Last edited by zip439; Feb 25, 2020 at 10:04 AM.
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