General P0300 Ignition Failures(generic) & P0304 Cylinder 4 ignition failure

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General P0300 Ignition Failures(generic) & P0304 Cylinder 4 ignition failure

bluaz

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P0300 Ignition Failures(generic) & P0304 Cylinder 4 ignition failure, so that its what i found today on the Error Code ,i have a strange vibration on idle at any RPM. Its feel strong ,when you look at the front passanger seat,you can see the vibration ,but this is only the engine is cold and sometime when i stay on idle more then 4-5min.

What can be? the spark plugs ?(i think it was never changed :D ) Some time i smell some strong "gasoline" from exhaust. Maybe the gaso is bad,need to change ??

P.S:engine oil was changed on 26.05.2016 ,the dipstick didnt show its full(i dont have MAX and MIN on dipstick)is on top... can be overfill ? The problem start recently ,i think if it was too much oil it give me a sign from the first start after oil change.

p.s2: after error code clear ,its didnt come back again.
 
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P0300 Ignition Failures(generic) & P0304 Cylinder 4 ignition failure, so that its what i found today on the Error Code ,i have a strange vibration on idle at any RPM. Its feel strong ,when you look at the front passanger seat,you can see the vibration ,but this is only when the engine is cold and sometime when i stay on idle more then 4-5min.

What can be? the spark plugs ?(i think it was never changed :D ) Some time i smell some strong "gasoline" from exhaust. Maybe the gaso is bad,need to change ??

P.S:engine oil was changed on 26.05.2016 ,the dipstick didnt show its full(i dont have MAX and MIN on dipstick)is on top... can be overfill ? The problem start recently ,i think if it was too much oil it give me a sign from the first start after oil change.

p.s2: after error code clear ,its didnt come back again.
.
 
after I consumed the last fuel,the vibration disappear and engine work smoooth as a cat :D. Strange is because when i filled last time(gas RON 99) ,the tank was 1/2 and i filled fully with gas RON 95(they said)...so i think gas is mixing ....now is again 1/2 and all was comming to normal , what ?
 
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