It could.
Could be a few different things. Spark Plug, plug wire, coil, injector, ignition module (these are most common) Head gasket, cracked intake, mechanical (ie valve,piston,cam etc) (less common)
It can.
try a tune up, make sure valve cover gasket is not leaking into #4 spark plug tube,check spark plug wires and coil.
Buy gasket paper off eBay. This will stop blowing and make it run.
You cant do it. The head gasket is the most important gasket in the engine and it is very specially made.
I would make sure power is getting to the fuel injector use a noid light to test it. You may also want to check the fuel pressure also the intake manifold may have a leak that can cause a misfire as well. Glad your compression is good. That is a sure sign its something simple.
Not unless you have a water cooled intake manifold, which is very rare on a car.
A failing cylinder
Repairing the head gasket on a 1994 Isuzu Trooper involves several steps. First, you need to remove the intake and exhaust manifolds, as well as the cylinder head. After ensuring the surfaces are clean and flat, replace the old gasket with a new one, reassemble the components in the reverse order, and torque everything to the manufacturer's specifications. Make sure to check for any signs of warping on the cylinder head and replace it if necessary.
Coolant getting into a combustion chamber. Probably a bad head gasket or intake manifold gasket.
Check your spark plug connections and spark plugs. If necessary, replace them.
You need to CLEAN the intake up real good where the gaskets fit against it. Then make SURE that the intake is NOT PITTED, If intake is real smooth then there is no reason to replace it. Just replace the gaskets.