Spark plug, plug wire, distributor cap, injector, internal engine ........as in a blown head gasket.
I talked to mechanic and he fixed 5th cylinder misfire on Dodge engine by changing chank shaft postition sensor. It came out on code reader though.
It means that more than one cylinder has a misfire history. PO301 would be cylinder number 1 misfire. PO302 would be number 3 cylinder misfire.
It could.
If you have a "check engine" light on, start with having the codes read. A misfire code can tell you which cylinder or cylinders are having problems. A misfire could be the cause of your engine vibration.
Bad plugs, wire , or coil pack.
Bad plug? Bad wire? Bad piston or valve (do a compression test)
sounds like a cylinder misfire..check spark plugs and wires..usually a code will show which cylinder it is, should replace all though
Most likely a bad coil (each cylinder has one) located at the top of each spark plug
Most likely a bad ignition oil. Each cylinder has its own coil mounted at the top of the spark plug
There would defiantly be a cylinder misfire, and rough running. Worst case the valve could hit the piston and do serious internal damage.
Usually a bad coil , or plug. if the injector was bad , the computer would have coded for it. But the cylinder 3 coil and plug arent that easy to get to. Its the one at the fire wall
P0303 is cylinder #3 misfire. P0300 would be random misfire. Either way you need to diagnose the case of a misfire. Check spark plugs, plug wires(if equipped), cylinder compression, fuel inectors, and wiring.