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Old 02-05-2012, 08:54   #1 (permalink)
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motor runs great at times and sometimes it want crank

Hi, i have a 1971 Ranchero with 351C and I have replaced the cam with a mild one somewhere around 509 lift. replaced intake and carb (600cfm) and headers. The car runs like a champ at times and cranks right up. but other times it has a hard time turning over and runs really rough. I've adjusted my timing a many of times and still not real sure what is wrong. Any help will be greatly appreciated.
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Old 02-05-2012, 11:52   #2 (permalink)
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Re: motor runs great at times and sometimes it want crank

Why have you got to keep on adjusting timing ? is the setting changing / altering ? Take it you have load tested battery and starter ?
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