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po300 is a random misfire, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why. If it was a po302 this means its #2 cylinder thats misfiring,ETC, But po300 could be any one of the cylinders. check plugs, wires, fuel injectors, Etc. Good-Day!
DTC P0300 - Random/Multiple Cylinder Misfire Detected Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.
A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
You will need to find out where you are misfiring from IE cylinder 1 -4 or cylinder 1-6 depending on size of motor. With your vehicle you have coils that attach to the spark plug and make the car fire. So you are going to need to replace the coils. Ifyour check engine light is on, and you have or can get a code reader it will tell you where the misfire is. Then you just go to your local parts store and get a new one.
Do you know how check the engine codes?
Turn the key 3 times and the codes will be displayed where the odometer number is displayed.
If the code is 302 it is spark plug mis fire.
It could be a bad fuel injector.
number one should be first plug passenger side front bank. if you don't want to invest in a tuneup try swapping the wire with one from another cylinder and see if the misfire moves to that new cylinder.
2. Vacuum leak
3. Injector fault
4. High or low fuel pressure. Thats the list of things to check. This is a #3 cylinder misfire. There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there. Hope this helps. Thank you, Lee
need to change the plugs and wires one of them did not carry the fire and thats what made the light come on check at night to see if you see any thing arching of wile its running change plugs and wires