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Try a different grade of gasoline. Late eighties cars have a hard time with the ethanol blend of fuels. If it is high milage engine compression builds up due to carbon which raises the compression ratio. Wait till engine is cold and start run a tank of premium and don't use ethanol blend. Change O2 sensor as a bad reading will send bad signals. Start with this and see if problem is cured. Changing plugs wouldn't be a bad idea also. This fallacy of plugs lasting for 50000 miles is just not true.

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15y ago
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