friend of mine has a 96 f 150 with 300 6 cylinder. said it just died on him other day. was running perfect then just quit. didn't spit or sput or act like ran out of fuel. acted like turned key off. he said he checked for spark and has none. replaced coil and no better. i gave him my code reader to check codes, if any. i told him to pull dist cap and verify shaft is spinning while cranking. any other ideas?