Why does my car idle rough, have no power and overheat ?”

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I recently replaced the distributor after the car idled really rough and died then wouldn’t restart. The first time this happened the error code indicated the crankshaft position sensor so I replaced it but still could not start the car. I then replaced the spark plugs, distributor cap and rotor and still could not start the car. Took it to a mechanic who after thorough inspection and testing determined a weak coil in the distributor so I replaced the distributor and was able to drive again. Less than 2 months later the SAME THING happens again! replaced the distributor again. This immediately resolved the no start issue again and restored engine power and strong idle.....for less than 2 days /: The idle is rough, the transmission shifts hard and late when accelerating, sometimes there is so little power when driving uphill, accelerating the car will slow down to 45mph with the pedal to the floor and now overheats when pushed too long like that but cools immediately when pedal is relea