Too much fuel - and all engines run rich when cold.
Gas mixed to rich
A 2 stroke engine will not idle and foul plugs after a few hours if there is a piston ring leak or the carburetor is providing too much fuel. This will quickly cause buildup inside the combustion chamber and cause it to run very rough.
My best guess would be the plugs aren't igniting the fuel and it's collecting on the plug.
temp sensor going bad will cause the engine to dump fuel and foul plugs very quickly.
If the injectors are spraying more fuel with out anything else changing, then yes, the plugs will foul. To get more power you need more air in the engine as much as you need more fuel.
Not for very long! The heavier oil, combined with the impurities would quickly clog up the fuel system, foul the spark plugs and create excessive wear throughout the engine.
Yes it can. If the sensor sends a false reading it can cause the pcm to over fuel the engine.
no. as this would harm the engine, or at least affect its life span and continued running. It would probably foul the spark plugs and damage the catalytic converter, if it has one.
Range Rover Classic EFI will foul spark plugs if you start and stop the engine when cold. All models with 3.5, 3.9, 4.2, 4.0, 4.6 will wear out camshafts and/or blow headgaskets from 150,000km to 200,000km.
yes
clogged filter, carbon in the intake, foul spark plugs, dirty injectors, or engine failure!! This may be something to do with the catalytic converter. Check for a recall.
It may well foul up the fuel filter, and certainly plug the carb and/or injectors. If not too much, the engine would burn it off and leave sooty deposits on your plugs for a while.