1st thing I did was change my plugs. Got the ngk from vivid racing. At first everything was fine. But now its happening again. Not all the time tho. It seems to do it at random times. I replaced them maybe 4k ago. I know you should replace them every 3 but it was startin to sputter again after 1k. Also car has 93000 miles on it. Any help?

 

ever 2 step, antilag, or anything of the sort. Mine foul as soon as i do it.

do you have an VIII or a IX ? try the better NGK's if you already havent. the IFLR7H

 

he has an '03 VIII.
two step launch control didn't come out till '05+

 

I had sputtering problems under acceleration. Took it to AMS, they replaced the plugs and good as new.