Just put in some new IK22 plugs and I'm having some misfires... to be exact, cylinder #4 seems to be misfiring. Just curious if anyone knows if I can gap the #4 and get it to quit misfiring or if it possibly could be a defective plug?

3rd

 

I thought 350Z is suppose to use IKH16. Unless you have mods like Turbo or Super Charger?

 

Yep, I was right. I check on Denso website and G35 uses IKH16. They don't have the listing for 350Z but G35 & 350Z uses same spark plugs.

www.densoiridium.com/findmypart.php

 

Laughing Gas going in soon.

 

 

I had my plugs in my car for now over 200 miles of HIGH HIGH speed driving and not a things wrong with it. I wasn't using any nitrous neither..... I donno how some people are having problem with the IK 22's?........