Sorry I know the car in question is not a 350z, but it is a 2005 g35 which has the same motor.

I just want to make sure I got my cylinder numbers right

passenger side cylinder numbers are 1,3,5
drivers side cylinder numbers are 2,4,6
Right?

so P0303 should be the middle cylinder on passenger side, right?

 

Correct.

 

Thanks mate

 

So what is going on here?

What is shorting and why ? I imagine since it shorting there, I can just get a new boot and the coil is fine ?

 

Could be a broken spring in the coil. Give replacing the boot a try and let us know!

 

well I should have removed the coil BEFORE ordering the new coil (oem from amazon). The new coil did the trick of course. But I am going to buy just the boot to fix the old coil as I suspect it is still fine.

The little spring inside the old run is fine...not sure why the arc decided to find its way out of the boot the way it did.

 

part of that boot that is dmg'd is phenolic plastic and plastic does crack over time. Plastic cracked and allowed spark leak burning the area and causing the miss.

 

Thanks for the explanation, the coils are original soooooo.

going to buy a replacement boot and see if that works too, I suspect it will....thus I'll have a spare for either this car or my Z

 

Nothing wrong with keeping spare parts, never know when you are in a bind and need a replacement. Spares can also be nice for diagnostic purposes.