leans code on both banks.cheap air filter

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Posted to Technical Tips Forum on 8/31/2012 64 Replies

2007 Ford f-150 came in with each bank at +35. At 2500 rpm fuel trim was at +22. I remembered reading about cheap air filters,i decided to take a quick peek. This is what i found. After replacing air filter,fuel trim came down to +/-5... Keep a look out !!! [2... Login to read more.

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