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ok, just finished changing the fuel filter, sensor, and pump.
the car runs smoother and more responsive when i press the gas pedal lightly. when i press the gas pedal half way down and/or all the way to the floor, the car hesitates with very poor response and the car does not speed up as it should. CEL will start blinking (and stay on if i continue to press the gas pedal). CEL will eventually turn off and go away if i stop pressing the gas and/or press the gas pedal lightly.
when the CEL stays on, i get codes P0300, P0303, 0304, and 0305, and P1399
WTF is wrong with the car?
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