Ok folks I could really use your help here. I just purchased a '96 Mustang that was throwing a P0301, P0302 and a P0306 misfire codes. Well the car is bone stock and this is what I have done with it so far in regards to making her run smooth again. I have replaced the upper and lower intake gaskets, new coil, new wires, new spark plugs and new injectors. Now I am just getting a constant P0306 code for cylinder 6 misfire. Now it used to run smooth on a cold start and then like a switch flipped in about 5 minutes the idle will go down and the thing shakes like a bowl of jello in an earthquake. I attempted to change out the computer with a salvage yard one but it doesn't have the same number on it and it starts and runs for about 2 seconds then shuts itself off so I took that one back out. I have read ALOT of forums and everytime I find the same issue I am having, they NEVER post the results on how they got it fixed or even if they did or not!! So I am to my wits end and I am begging for all you gearheads out there to shine some light on this sucker!!