2.2L Performance Tech 16 valve 143 hp EcoTec with 150 lb-ft of torque

P0171- This one is a head scratcher

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Old Aug 12, 2023 | 07:58 PM
  #21  
Theservicegroup777's Avatar
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Joined: 08-11-2023
Posts: 9
From: Texas
Before I reset the fuel content I ran a tank of ethanol free fuel and content didn't change . Stayed high through the entire tank. I was hoping to let the car adjust itself to a lower value but it apparently still thought at that time inwas running ff.
Old Aug 13, 2023 | 11:58 AM
  #22  
donbrew's Avatar
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Joined: 01-23-2009
Posts: 26,532
From: Fredericksburg,VA
Did you check the fuel and vapor lines for holes? The frequent area of concern is under the insulation/clip in front of the driver side rear wheel. That can cause P0171/P0172 because of extra air in the purge vapor or low fuel pressure.
I don't put any faith in smoke tests, I never heard of one finding the leak. Eyes and fingers do a better job.
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