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Run a compression check on all cylinders. Make sure you mark the sparkplug wires before you pull the plugs so that you can get them back to the right place without too much trouble. As you pull the plugs, check each one to see the color of the insulator. If there is one plug that is black and the rest are white or light brown it might be an indicator that the cylinder is missing. Write down the compression of each cylinder as you check them. If one or more is considerably less PSI than the others it/they may have burned valves. If the plug is black but the compression is up it might be oil fouling from bad rings or valve stem seals.

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Q: What would be wrong with your 1985 TC that is missing and has had replaced module on distributor plugs wires rotor cap gas filter but is still is missing Thanks?
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