I have a 2000 buikc century ,and when going up hill,it gets sluggish.somtimes when you take off ,its like it doesnt have any power and will barely move.people are tellin me its the timing,now does the car have a timing belt or timing chain.or is it just the coil pack going bad thats causing it to run like caca?

Cars & Trucks - Buick - Century - 2000 Buick Century