O.k, I've been having this problem for a while and I think I have located the source. The problem that is was having was i would all of a sudden have very choppy acceleration in all gears. I thought it was my aftermarket coil pack and wires so I switched to ford parts and it still gave me the problem. Then I tryed switching spark plugs and went with the copper cores and still no cure, but the other day I wanted to make sure everything was tight and I pushed the harness that goes from the car into the coil pack in alittle and it worked ! The car ran beautifully for 2 days and then gave me the problem again. So, at a gas station, I opened the hood, unplugged this harness, made sure the spark plug wires were tight and plugged it in again and it ran good for about 20 min and then back to crap. Does this sound like the harness is bad ? and if so, should I replace all my engine wires ?