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**CC69Rat** · 03-14-2012, 03:47 PM

Pull your spark plugs..

the end of the plug should be a white / Milk chocolate color if it's burning clean. If you have one pulg that looks different (black / wet / oily looking) then the gas going into that cyl is not being burned efficiently. Could mean the plug is fouled out .. and $2 replacement would fix it .. It could also mean other problems such as a burned valve, maybe broken valve spring, .. etc. But, check the simple stuff first before you pull the heads.

.. just my .02.

03-14-2012, 03:47 PM	#9
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,224	Re: 350sbc pops and spits under load Pull your spark plugs.. the end of the plug should be a white / Milk chocolate color if it's burning clean. If you have one pulg that looks different (black / wet / oily looking) then the gas going into that cyl is not being burned efficiently. Could mean the plug is fouled out .. and $2 replacement would fix it .. It could also mean other problems such as a burned valve, maybe broken valve spring, .. etc. But, check the simple stuff first before you pull the heads. .. just my .02. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)