Ford Focus Forum, Ford Focus ST Forum - View Single Post - Symptoms of a valve seat about to drop?
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Old 02-08-2013, 04:06 AM   #17
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Quote:
Originally Posted by GUM85 View Post
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.
Trouble code: p0320 = Ignition engine speed input circuit.

http://www.focusfanatics.com/forum/showthread.php?t=294155
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