"Cool running"...Hottter plug? TR3 carbon fouling.
I came across the term "cool running" in the TR4 Bentley manual accompanied by a picture of a dry black carbon fouled spark plug looks (as opposed to a a pic of a too rich mixture plug that was wet and oily). The plug looks like mine. I'm trying to track down carbon fouling of my plugs after an hours driving that is causing missing and sputtering. Does "cool running" mean I need a hotter plug?....and how do I determine what plug to go to? I'm running a street cam and header and TR4 long intake manifold.
I came across the term "cool running" in the TR4 Bentley manual accompanied by a picture of a dry black carbon fouled spark plug looks (as opposed to a a pic of a too rich mixture plug that was wet and oily). The plug looks like mine. I'm trying to track down carbon fouling of my plugs after an hours driving that is causing missing and sputtering. Does "cool running" mean I need a hotter plug?....and how do I determine what plug to go to? I'm running a street cam and header and TR4 long intake manifold.