We found that the whole ignition distribution system on my daughter's 91 Integra was shot, and what finally killed it was a leaky radiator spraying a fine mist on the cap/wires. On thorough inspection the distributor shaft was worn out. So distributor, cap, rotor, wires, plugs, radiator, hoses, thermostat, all at one time.
Total bill: $850.00 (includes flush/new coolant, supplies, tax, etc.)