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Old 05-19-2017, 06:56 PM   #15
Dick Steinkamp
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Join Date: Apr 2016
Location: Bellingham, WA
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Default Re: Sea-foam, MMO, or fogging to help sticky valves?

Originally Posted by Mark W. View Post
Last fall I purchased a 28 Phaeton which has not been driven in a long time, it seems to have the problem of backfiring and bucking that I would atribute to sticky valves.
I think you are jumping to conclusions. You may be right, but I'd want to know what was causing the "backfiring and bucking" before I implemented a solution (or series of solutions).

Have you done a compression or leak down test? Valves hanging open would clearly show.
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