Mercury Cougar 1999 engine is shacking?

I bought 1999 cougar V6, engine is shacking stopped or driving I changed all 6 spark plugs and the wires (cables) and the engine still shaking, could it be cylinder? or what could it be? transmission seems good no problem hefting (auto trans ) I took all of the 6 wires when the car was turned on and 5 of the 6 has electric but one does not do any thing...I just unplugged them and looked for a little sparks, but 1 of them does not work. if it's cylinder do you know how much is it cost to get it done? thanksMercury Cougar 1999 engine is shacking?you said one isn't sparking? trace that wire back to its source, I'm guessing it would be a coil pack right?Mercury Cougar 1999 engine is shacking?good to hear buddy, take it easy, good luck

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Mercury Cougar 1999 engine is shacking?It might not be the cyclinder or the spark plug.



There wire that comes from the distributor to the spark plug might be worn out, so check that. Change the spark plug for the faulty cylinder if you havnt.

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