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post #1 of 2 (permalink) Old 02-01-10, 05:10 PM Thread Starter
DJ
 
Join Date: Dec 2009
Location: VIRGINIA
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confused 02 SUPERCREW Codes P0171 & P0174

Replaced coil packs on #5&7 for previous codes but still receiving codes P0171 & P0174. The truck runs rough after warming up and when at idle. It almost wants to choke out when stopped and idling. I think I smell gas sometimes from the truck but I do not see any leaks around the injectors.
I am about ready to pull out what little hair I have left Any suggestions please!
DJ


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post #2 of 2 (permalink) Old 02-01-10, 05:40 PM
2002 F150 XLT
 
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Re: 02 SUPERCREW Codes P0171 & P0174

P0171 and P0174 are lean codes on both banks. Check for vacuum leaks. Hoses, gaskets etc.

Bert
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