Boy thats not much info to go off of... 1st, does the car/engine have high mileage? 2nd- Could be the distributor cap as I hear they are a problem a lot of the time, 3rd- Possibly loss of compression in some or all of the cylinders... Do an easy compression test to eliminate this theory... 4-could really be a number of things, from anything as easy as spark plug wires to bad piston rings or a headgasket....
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