Well my car has been acting real funny since the end of march, but the past few days it has started to die when I stop at a read light, stop sign, etc..........When I give it a little gas below 2500rpm it hesitates REAL bad, and at WOT it has a major lack of power, what could the problem be, and How much is a new optispark system?

Car has 40k miles.

 

It maybe the opti.I would start with fresh plugs,wires,fuel and air filter.See what that does for you.

 

I would just get it scanned. You can use a scanner from Orielly auto parts for free. The Opti will cost you around $ 200. It`s very simple to do.