Water plays havoc with high tension electricity -- everything from the coil forward. Will create a short or ground very quickly. If car won't start, put a timing light on the coil output. You've got to have fire there for any hope of starting. You can use a hair dryer or heat gun (not too close!) to dry things out. On a clear day, with car running gently soak various ignition components using thin stream of water from garden hose. If moisture's getting in, this will find it. I was promised new cap & rotor by previous owner. Think now it was factory (Renault) original. Car had bad "English Morning" syndrome. Also would not start in even light rain. Hitting distributor with garden hose killed every time (was only component susceptible to water). In all fairness to cap & rotor, could have been terminal end of ignition wires too. Moot point -- new cap, rotor, and wires make my car startable virtually under water. Funny thing is the old components had no visible cracks or deterioration. Bill Robertson #5939