HELLO I PLUGGED IN MY CODE SCANNER AND THE CODES...

  • Tiny
  • rmoore09
  • 1996 Ford F-150
  • 178,200 miles

Hello, I plugged in my code scanner and the codes came up P0171, P0443, and P0174. I think there is a vacuum leak somewhere. I do know the valve cover gasket is leaking on it as well. There is a bad crackle as you accelerate in it. Any suggestions?

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Tuesday, January 1st, 2013 AT 4:36 PM

3 Replies

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Check the pcv hose elbow behind the upper plenium. It is a common failure.

Roy

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Tuesday, January 1st, 2013 AT 4:38 PM
  • Tiny
  • rmoore09
  • Member

I checked it, its in good shape. Could I have a bad purge valve?

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Tuesday, January 1st, 2013 AT 4:40 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Besides the pcv hose, low fuel pressure, mass air flow sensor or bad pcv could be the 171,174.

The 443 is an evap issue. Separate issue completely.

Check the chart below but requires a scan tool, smoke machine and volt meter

Roy

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Tuesday, January 1st, 2013 AT 4:48 PM

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