If your valve guides were shot your engine would be burning oil and the plugs would be oil fouled. Carbon fouling on plugs is caused by : - too rich a fuel mixture - excessive idiling - dirty air filter - weak ignition - improperly operating heat riser - defective fuel pump Bill Vancouver, BC Kevin Wible wrote: > > Bought car from original owner in 1985 for $800(!). It > was my daily-driver until 1992. Garaged continuously since then. Was > running fine when I put it away, but was starting to carbon-foul the plugs > frequently. (Valve guide seals shot?) 200K miles on original engine. > >