I have 96 f150 4.9 6 in line code p0001 I can't pass smog test please help I replaced air flow sensor, new spark plugs, nock sensor, new ignition module, distributor, spark plugs, nock sensor, crankshaft sensor, gas regulator, new ox 2 sensor one and two, checked for vacuum leaks but it is ok . can some one help me .? thaks
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