that happen to me too. at first when i put in the spark plugs i was fine. like a month later my cylinders started to missfire and i bet thats wats happening to u. i took out the plugs and put my stock ones back in and i was fine.
i have a su tmic too and my tabs broke too... i bought mines in feburary and they broke in like may or june. i contacted them and mark told me to send it back in and they will put new reinforce tabs on. it fits great and i had no problems since but the rear tube fitment is annoying and my tube...
i had new spark plugs. and they came pregapped. i had them on for like almost a month and they were fine. until just a couple of days ago. my gas mileage was bad as hell too.. i just put the stock ones back in and it running normal again. lets see if it lasts though. and i'm not really stock...
when i drive at wot my car stuttered and my engine light came on. i plug my ap in to check and it said random/ multiple cynlinder misfiring. anybody have a clue what this means..
i was just at the track a few weeks ago and my best time was 14.3. i was really hoping to hit in the 13's. but being up here i guess it was a pretty good time. if i was at sea level im sure to hit in the low 13's.