After I did the compression test and found almost no pressure in cylinder #5, I unplugged #5 injector. Thought if it's a flat miss fire, didn't want to continue dumping unburnt fuel and give the chance of washing the rings. The truck runs worse with it disconnected, as expected. But with everything connected, it contributes a fair amount. Just not on the same level as the rest.
IF it is a burnt valve, are these classic symptoms?
Just hoping to diagnose it as accurately as possible before I make any considerable purchases. The ideal scenario would be to find a crashed explorer/4.0L ranger and rebuild a motor how I want while keeping the truck alive.
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