which ngk?

 

g-power platinum, i think

 

Maybe it isn't your plugs...
Maybe its your coil pack?
Just a thought.

 

Stop buying platinum plugs...

Go to autozone, get auto light copper plugs (whichever match stock numbers), make sure they are gapped properly, and put them in your car.....

 

i had the same problem with my car... if i would drive it for like 30-45 minutes at about 60 and i slowed down to take a turn and i would start accelerating and when i got to around 40 which is about 1500 rpm my car would sputter and kinda buck a little bit... i had to replace my passenger side manifold so i was like whatever lets spend 4 bucks each on some plugs and it fixed the problem... i figured it was the fuel wasnt gettin detonated enough so it was slightly choking my engine.. easy fix but now im still gettin worse gas mileage than my dads 07 cummins