I was wondering couldnt you use Evans at 0 pressure to stop spark plugs from fouling when using regular coolant at 13psi pressure. Or even having coolant leaking from the reservior tank. If there's no pressure it cant be forced into the combustion camber or am I wrong.

 

Yep, your Wrong.......

While your coolant system pressure may be at 0 psi, your combustion chamber pressure will be over 100 psi (well, at least that high).

Is coolant fouling your plugs? If so you have blown seals there is only one fix.