Lincoln/Mercury Repair: Merc tracer poor idle-follow up^, spark plug wires, engine vibration

Question
Hello Dinger, in response to your latest answer. Yes the car for the most part runs fine and it has never stalled, it just violently shakes when you are sitting at idle in gear weather the AC is on or not.My wife has the exact same car just a year older and I verified the spark plug wires were in the right order. I have another Air intake valve sensor I will try if you think of anything else please let me know....Thank you....... PHIL

Answer
Hey Phil,

Did you check the mounts? I can't see how bad it's shaking, but a broken mount will transmit the normal engine vibration to the interior of the car. Normally you will feel this in the wheel and throughout the vehicle. When checking this, put your foot on the brake and put it in gear with a little throttle, it the engine moves quite a bit, then look to see where it's moving most and replace that mount. Do it in forward and reverse.