i changed spark plug.injectors.fuel pump .the problem still misfiringInfiniti FX35 .can you gave me a procedure how to check ( multi cyl.mis firing) code p 0300?
If you know what cylinder you are having a misfire in, try changing your spark plug wires between two different cylinders. (i.e. - if cyl 3 is misfiring, swap wires to cyl 3 and 4 AT BOTH SPARK PLUG AND DISTRIBUTOR and see if the misfire follows the wire) If this occurs, you probably have a bad wire.
It might just be a good idea to try replacing the wires anyway, they don't last forever and they're pretty cheap. I hope this helps you out, good luck! :)Infiniti FX35 .can you gave me a procedure how to check ( multi cyl.mis firing) code p 0300?
If everything was done by you, it is time to send it to an experience tech. Find a tech that knows how to use scan tool to monitor misfire count and can read other engine running condition to narrow down problem area.
You did replace spark plugs, injectors, fuel pump but did you check ignition coils? Is there other code stored in memory?
There are few basic things you can check before send it to a shop..
check for air leak.
Overfilled engine oil may cause random misfire.
Dirty fuel filter may cause lower fuel pressure and result in random misfire ....
