i have changed the timeing belt and set the timeing by the marks and put new plugs in . but it still runs rough .i also had carbon deposits on my new plugs. it starts on the first crank but it runs rough. i am at my wits end , can anyonegive me any ideal about what may be wrong. i thought maybe low compression but i had that checked by a friend and he said it the compression was good, the plugs are gapped.040 at . the pecs. call for it to be gapped from .039 to .043. please anyone any ideals.thanks j.s.