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Old 02-07-2013, 09:21 PM   #13
GUM85
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Do you know what code it was and what cylinder did your valve seat drop in? I've heard the #4 cylinder is the most common to drop a valve seat followed by the #2. The code P0171 is for the #1 cylinder so I would assume that would be the cylinder with the problem but I've never heard of a valve seat dropping on the #1 cylinder.
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