got a 172 ph2,Driving along other night and noticed SERV light had came on and stayed on.....got to where i was going and turned car off for about a hour,when i started it again light had gone off...but i keep getting a misfiring and sometimes hesitant and stuttering when im driving.....anyone got any ideas,ive opnly had car 10days,its going back to garage on mon to get looked at,but i dont know much about these particular cars and dont want the mechanics to fob me off with some rubbish....any help appreciated...thanks