Well, I thought that would fix it, but no! The engine cranks but still won't fire, even with a new, intact cap and rotor! And unlike before, when it felt like it was trying to fire, now I don't even get that - it just cranks and cranks and cranks. I have spark and fuel in all 4 cylinders, and nothing blocking the air. Could something in the distributor itself have gotten out of alignment and thrown the timing off? I'm really at a loss...