Originally Posted by jfc_tech

yes need to retune when changing new plug of other brand, definitely. but i noticed u said on the third time, your pitman just hold your buggy to let u rev then its ok for the 6 1/2minutes run aftward. thats normal. we need to rev to clear the fuel that was in the engine after refueling, if not it will bog down..like what happen to u. its becoz already rich when goin out.

mine happen like that with my sts. need to retune again. that leaning it a bit. i don understand at first but thats also happen to mine. i perhaps wrongly said, "typical of sts engine"... but maybe i jump to conclusion early as our engine made same.