Engine "missing or loading" at lower RPM. 350-auto-250,000 miles. Replaced-cap/rotor/wires/plugs/fuel filter/air filter-all the usual stuff. Still misses. Pulled new cap-very dirty!</P>


Could it possibly be a worn out distributer with so many miles? Or anyone have other ideas?</P>


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Thank you in advance!</P>

did the spark plugs look very bad when you changed them? did the tune up fix the problem for a while then it came back?