Road trip with bad pinging under load, P0171 code

Joined
Sep 17, 2010
Messages
41
Location
Everson, WA
Having some car problems on a SW road trip in 100' temps with a car full of camping gear. The P0171 lean fuel trim code came up a few times after climbing big hills. A new air filter seems to have fixed that, I hope, it was really nasty,but I'm getting a lot of pinging under load and lack of power. Any connection? I'm thinking fuel filter next? I've noticed that that has fixed th P0171 code for some. Should I be concerned about the pinging? Temps are under 200' for the most part. Thanks.
 
Joined
Aug 3, 2009
Messages
482
Location
Lander, WY
What octane fuel are you using. I can purchase 85 octane where I am at. Try better quality/higher octane fuel if the temps are that hot and you are fully loaded.
 
Joined
Sep 17, 2010
Messages
41
Location
Everson, WA
I switched to 91, which helped a tiny bit maybe. Seems to get worse the longer I drive in a day and the hotter it gets. Hitting I-70 into the Rockies early tomorrow!
 

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