Counterfeit Nissan and NGK plugs

The Gas and Diesel Engines - VQ40De, VK56DE, YD25DDTi, V9X, Transmission, Transfer Case, Oil, Differentials, Axles, Exhaust...

Moderator: volvite

User avatar
Posts: 193
Joined: Sat Jul 28, 2007 9:20 pm
Location: Los Angeles, CA

Postby V8Pathy » Mon Nov 25, 2019 10:28 pm

got my replacement from Courtesy Nissan and installed them tonight.
All 8 of them had the exact same gap 0.037 ish which is about the gap that was on the oem ones I removed with 120K on them.

The counterfeits I pulled had various gaps: 3 were 0.020, 3 were 0.025 and 2 were 0.030 ish. I also noticed the lower electrode had a wider base on the counterfeits as well as a different font on the side.

SUV seems to idle better at about 750 rpm vs 500 rpm with counterfeits. I was getting lots of misfires at 500 rpm.
I haven't felt misfires at idle so far in my test drive tonight. time will tell.

User avatar
Site Admin
Posts: 1563
Joined: Tue Jan 31, 2017 4:45 am
Location: Mid Atlantic

Postby palmerwmd » Tue Dec 03, 2019 4:03 pm


Thanks for the update!!!

Return to “R51 Engine, Driveline and Powertrain”