think, remove the black cover to access the distributor cap. Use an allen wrench to remove the distributor cap and inspect the condition of the terminals inside the cap and the distributor rotor arm too. Both are wear items that should be replaced every 30,000 miles. At a minimum clean any deposits off the distributor cap terminals and the distributor rotor arm before reassembly.

It will be easier to clean up the distributor rotor if you remove the 3 allen head cap screws, and lightly filing the rotor arm.

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Fred Hoelzle