A blown head gasket, or a cracked block.
bad valve stem seals
Check engine light on?? Not running on all cylinders?
The process of the engine creates huge amounts of heat. Water is past through the engine block (that is where the cylinders are ) where it collects heat from the case body of the engine block and its taken to the radiator where air is passed through the radiator cooling the water. The cycle continues. If the water did not circulate then the engine would expand considerably, the cylinders will also then expand as would the moving parts to the point where the friction would cause the engine to cease up.
Bad hydraulic cylinders.
bad ignition coil, bad ignitor
I would firstly suspect the head gasket.If the gasket is blown between them two cylinders and the waterway or oilway, this would cause the cylinder to become contaminated with either oil or water which would prevent it from running.To check this, remove the oil filler cap and look for creamy emulsified oil or you may see bubbles appearing in the coolant when the engine is running. HTTP://online-merchant.no-ip.biz/ dampness
Presumably they would be cylinders.
A leaking radiator hose would NOT cause this to happen, you have 2 problems with this vehicle.
It may be the floats are stuck in the carburators or the chokes may be stuck on.
Assuming that you are referring to the engine's piston cylinders, either your engine has been submerged in water, someone is playing a nasty (and expensive) joke on you, or you have a serious head gasket leak.
My mechanic claims that a bad Egr can in fact effect the firing potential of certain cylinders by for instance flooding them with too much exhaust.
The year, make and engine info would help us help you.