Ok guys be patient with me as I am horrible at trying to explain things in words!! But here I go I have been having trouble with fouling out number 7 cylinder spark plug while on the bottle so I stopped using it because it would not foul the plug when just going hard N/A it was fine. Well now about 2 weeks later the car is does not have a fouled plug but the car is about as fast as a 4 door saturn I don't really know where to start to look for the problem as I have never really had any engine probs like this before, this is the first!!

 

Are you throwing any codes? if so, get autozone to check the computer. Is the car smoking hard? Could be plugs, could be O2 sensors, could be something worse.

 

No codes, so i am thinking worse!!!!