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1987, if early edition most likely carb. Spark plug gap should be 0.044. The change was in 1989 going to 0.054 inch. If you ever have a problem that the car just stalls, and will re-start several minutes later, and happens often or once in awhile, change the module on the firewall, sort of like a silver box with 1 wire harness plugged into it. They have a tendency to short out. good luck.

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Q: 1987 mercury topaz 4-cylinder 2.3L engine spark plug gap?
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