You might consider replacing the coil too. If you perfrom routine maintenance it's surprising that the engine's performance deteriorated so rapidly. Fuel filter replacement is every 60,000 miles ... I'd start there if it wasn't done at 120,000 miles ... and replace the distributor cap/rotor. If the ignition wires are original you may want to replace them ... I recommend Beru wires ... more expensive, but better than Bosch. Spark plugs (Bosch F8DC4) and air filter should be replaced every 30,000 miles.

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Fred Hoelzle