Depending on the vehicle, it is usually an ignition lead or spark plug.
There can be far more problems however, Injectors, burnt valves, leaky intake manifold, blown head gasket, individual coils, and the list goes on, if it misfires under load, ie. going up hill in a low gear then it is more likely an electrical misfire, if it is all the time and very constant then it may be one of the other options listed above.
It may be easier to figure out by knowing what type of vehicle it is and what year.
If check engine light is on, have a parts store read the code. It will tell you there is a random misfire and usually what cylinder is misfiring. Replace the coil pack for that cylinder and all will be well.
Most commonly a bad plug or wire. If not that, then coil.
Misfire is caused when a cylinder doesn't ignite its fuel mixture. Suspect a bad plug, coil, or wire. This will not be caused by a mass airflow sensor, that can cause a rough idle or bad fuel economy, but will not cause an individual cylinder to misfire. Driving with a continuous misfire condition will eventually destroy your catalytic converter. If your check engine light is flashing you are doing serious damage to your cat converter.
if is model with computers etc,most probable cause is the cam positioning sensor
Isuzu uses the spark plug as a sensor of the burn efficiency inside the cylinder of the engine. Use of the wrong brand plug can cause this misfire code in a good running engine. Otherwise perform tune up to repair misfire
a bad wire or a bad coil to cylinder 5.
What causes misfire 302, 304 and 306
Usually the occasional spark plug that needs to be cleaned and gapped.
the gun powder ispacked to tightly and the preassure builds up and can cause it to misfire
what are the possible causes of misfire on number one cylinder in a dodge 2003 ram 4.7 liter engine
Spark plugs
Find and repair the cause of a misfire on cylinder #5.see related question below.Find and repair the cause of a misfire on cylinder #5.see related question below.
I'm not a mechanic / technician but I BELIEVE if the fuel injector is restricted so that the proper air - fuel mixture is not getting to an engine cylinder , that an engine cylinder misfire can occur ( that is only one of the causes of an engine cylinder misfire )
Stop by http://www.coloradofans.com there are different people that have had that problem. you can probably message them personally and see how they got to that problem. P0300= Random/ multiple cylinder misfire detected P0301= Misfire detected- cylinder #1 P0302= Misfire detected- cylinder #2 P0303= Misfire detected- cylinder #3 P0304= Misfire detected- cylinder #4 p0305= Misfire detected- cylinder #5 P.S. These are Diagnostic trouble codes, not vechicle id numbers.
That would be that there isn't enough gas getting to them
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.
#5 cylinder misfire.