Faulty: spark plug, spark plug wire, ignition coil, ignition module, fuel injector are the most common. Coolant leaking into a cylinder is another.
Internal engine problems such as burnt valve, broken valve spring, bent push rod, worn rings
Answerthis could be anything to do with the cylinder on your car. The plug, the wire, the cap, or the coil (whichever you have.) your best bet is to do a tune up on thecar and do all the plugs, wires, cap, and rotor. if you have a coil pack, try to change those. this is all i can say for now. if that doesn't work, ask the question again and give a little more detail on how the car is acting.
Technically speaking, cylinders do not "misfire": the spark plug causes a spark which causes the fuel to ignite which moves the cylinder, so it is the spark plug that may misfire. Given that, motor vehicle spark plugs may misfire due to any of a number of reasons, including watered-down or low-grade fuel, old and/or dirty oil, fouled spark plugs, clogged cylinders, insufficient oxygen to the plugs, poorly aligned cylinders, et al.
If your plugs, wires, cap, rotor and a compression test check out okay I would suspect the #3 fuel injector.
Worn, faulty or dirty spark plug; cracked or worn spark plug wiring or loose connection.
I'm not a mechanic / technician but it might be the spark plug , spark plug wire , not the proper air / fuel mixture to that engine cylinder , and there are probably other causes
P0303 : misfire cylinder #3
Was an intake manifold gasket for me.
Cylinder #1 misfire.
Check your spark plug connections and spark plugs. If necessary, replace them.
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A partially clogged converter will cause this. Also an overly rich fuel/air mixture or a cylinder misfire is a cause.
In the past I have had an engine misfire due to a bad fuel injector. hope this helps.
Could be a bad ignition coil each cylinder has its own
po301 means cylinder 1 misfire