460 COLD START MISS SOLVED
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460 COLD START MISS SOLVED
DEEN,BB79,DANNYP THANKS FOR YOUR HELP.
Well, after checking all of the obvious I finally pulled a valve cover. What I found was that the top, last turn of the valve spring for the intake valve on No. 8 cylinder was broken. The speculation is, the reason the miss would go away after the truck was warmed and then shut off, is while its sat off , either the valve guide warmed or oil would work its way in to the point that would allow the valve to completely close . Then upon restarting the weakened valve spring would have enough tension to completely close the valve. All fixed and running.
Anyway, thanks for your suggestions.
Craig
Well, after checking all of the obvious I finally pulled a valve cover. What I found was that the top, last turn of the valve spring for the intake valve on No. 8 cylinder was broken. The speculation is, the reason the miss would go away after the truck was warmed and then shut off, is while its sat off , either the valve guide warmed or oil would work its way in to the point that would allow the valve to completely close . Then upon restarting the weakened valve spring would have enough tension to completely close the valve. All fixed and running.
Anyway, thanks for your suggestions.
Craig
