My 1991 Accord stopped running, without warning. I towed it home and determined the timing belt is not broken, but that there is no spark. How can I determine what the cause of this problem is? The distributor rotor turns, and there is no evidence of distributor bearing failure (no dust). I understand the igniter may be a problem, but that there may be no way to test it without just buying one, which is not returnable. Also, does the rotor just pull off? It does not want to come off. Thank you, - Phil