1996 FORD F-150
178,200 MILES
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RMOORE09
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  • 132 POSTS
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?
Jan 1, 2013 at 4:36 PM
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ASEMASTER6371
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check the pcv hose elbow behind the upper plenium. it is a common failure.

Roy
Jan 1, 2013 at 4:38 PM
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RMOORE09
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  • 132 POSTS
I checked it, its in good shape. Could I have a bad purge valve?
Jan 1, 2013 at 4:40 PM
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ASEMASTER6371
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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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Jan 1, 2013 at 4:48 PM