There was a batch of mopar distributors late 90's-2001 roughly, that had phasing problems. The top shaft was machined so that it clocked the rotor wrong. Had it happen to me....but it ain't effecting **** till 4000+ rpm and you would not hear or see it like he is at 3000 rpm. The other thing is its specifically the number 5 cylinder that was affected by the phasing issue and would scuff the skirt of only that cylinder alone.