code bank 1 and i replaced oxygen sensers, now bank 3 and running lean, on 2004 Ford F-150

while driving,giving gas it is bogging down and missing, get's a little better and does it again. have had it in the shop with no luck, just cost a lot of money.

by in Golden, MO on July 08, 2014
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1 answer
ANSWER by , July 08, 2014
Possibly very small debris in mass air flow sensor .