Son in law's Taurus has been sitting for several months due to an acceleration problem. I charged the battery and started it. It ran.. but, the acceleration was sluggish with a delayed response. Pulled the codes and got PO351 and P1401. Tried to move it and it would only do 5 mph floored. Changed the coil and plugs while I had the intake off and it ran even worse. Double checked the pack to cylinder wiring and it was correct. The oil probably hasn't been changed in a decade knowing him. It almost seems like timing is out. I plan on changing the oil and replacing the cam sensor. Anyone out there that has had the same symptoms...I'd appreciate your input.