might possibly be time for a tune up, how many miles are on the car?
heres a couple things i did to mine and it really woke it up:
1.New spark plugs (i went with copper, seems to be what everyones running)
2.taylor wires (fixing to switch to msd wires and coil, nothing wrong with the taylors though)
3.took off the intake manifold and unbolted both the Idle Air Control and Throttle Positioning sensor and cleaned them both with throttle body cleaner very thoroughly, then it took me almost an hour and a half to clean all the oil out of it from the crank case ventalation hose that connects to the intake tube.
4.took a mirror and a flashlight and looked down all my runners in the head to see what the ports and valves looked like, (as far as being clean or not) even though they were very clean i still shot some throttle body cleaner in each one just to clean out any residue.
5. while making sure everything it very clean go ahead and put it all back together and fire it up, it may take it a few secounds to start but it will and let it burn all the cleaner out then take it for a ride.
Now i also cleaned my MAF sensor and reset the ecu on it just to start fresh and man did it make a huge difference, much smoother and pulled alot harder. good luck and hope this helps some.