Just brought my car a week ago my first ERST S2 was running fine, drove it back home which was a 125 miles every thing running ok goe's to jump in it the next morning started ok sounded a little bit lumpy as it warmed up it seemed to cure itself, Stoped at my m8's house noticed the idle of the revs have droped to near conking out as I reved the car it sounded as if it was running on 3 cylenders [Very Lumpy] then it decieded to konk out and would not start, so brought a new set of ht leads, spark plugs and a [air filter] the car did not have a air filter when I brought it?? anyway the car now starts very smokey and very lumpy. Took the spark plugs out after starting the car they are very black, could this be over fueling itself if so could I adjust it myself ?