I've owned Acuras and Hondas in the past, but this is my first Nissan ( 2003 Touring )!!
I'am particularly excited about the Z and can't wait to start dressing her up...but at the moment I'm having issues, I've been cursed with the infamous p0300 code.

I've been researching up the butt on the issue regarding this "multiple misfire" code and can't 100% relate to other peoples problems with it.

I have already replaced the spark plugs, check the coils for any significant damage or "wear and tear" which cleared, and used injector cleaner. The problem still persists.

Its weird how the car suddenly becomes free of misfires throughout my drive, then comes back. So I'm leaning more towards dirty injectors? maybe? The SES light blinks often as well then clears itself oddly enough. Also, not sure if this matters but the left exhaust pipe seems to emit more of a "popping" sound than the right end of the exhaust pipe :/


Any input is appreciated, I look forward to getting to know you guys!
Thanks again!

 

Cant help you with your problem without more info/being able to hear it myself.

But as for the popping sound from the exhaust, if it's the stock exhaust it has a Y pipe in it so listening left to right wont make a difference.

 

1. Check your cats. Anytime the plugs are reversed over a short period of time, fuel is dumped causing the cats to be burnt.

2. Check for leaky injectors.

 

The popping sound is normal I wouldn't worry about that