have a 2003 f150 4.2l. i changed ignition coil, plugs and wires, fuel filter and bank 1 upstream heated o2 sensor. now i get po135 po316 and po300. im stumped. any advise?

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ScottyKilmer
ScottyKilmer

Editor

if you didn't have the codes before, I would suspect some of those parts are bad

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