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Q: car ideals up and down on 1994 Honda Civic

When car is in park it ideals up and down also when driving at low speeds it putts
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Check the coolant level , low level can cause a Honda to have a surging idle. It could have a bad coolant temperature switch in the cylinder head or a bad ground at wires I think on that engine are near the thermostat housing under a bolt thats head size is 10mm.
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