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Daves55Sedan · 07-23-2018, 09:39 PM

A vacuum reading of 14 is too low for a Y-block. Should be around 20. Could be a number of different issues responsible; leaky intake gaskets or carb base gasket, valves not seating all the way, could be internal to the carb.
Oil in the spark plug could be caused by bad piston rings.
Blue smoke....she's an oil burner.

07-23-2018, 09:39 PM	#28
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: Pulling my hair out over this misfire A vacuum reading of 14 is too low for a Y-block. Should be around 20. Could be a number of different issues responsible; leaky intake gaskets or carb base gasket, valves not seating all the way, could be internal to the carb. Oil in the spark plug could be caused by bad piston rings. Blue smoke....she's an oil burner.