2001 F150 P0303 Code
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2001 F150 P0303 Code
2001 F150 4.2L V6 5 speed135K miles. running very rough. loss of power at hiway speed. MIL flashed. Code P0303 misfire. Also codes for right and left bank lean. Lean codes have been around for awhile. T/S - Found bad plug wire (open circuit). Checked coil pack. greater than 10K ohms across coils and about 1 ohm across control pins. Ohms are the same as a coil pack on another truck w/ same motor. Changed all plug wires and it runs a little better. Still rough running under acceleration and hiway speed. No codes after one drive cycle. Ideas?
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