yea Ken you right, but how can i confirm it's the Fuel Pump? so far i have replaced vacuum lines with brass Ts, PRC, FPR, Injectors, Spark plugs (NGK 3741), Coils and Fuel filter. I can't remeber when the last owner change the fuel pump. when i drive even i higher RPMs it hesistates and act like it's running out of fuel, and when i floor it the engine just rev and the car doesn't respond. so how do i change the fuel Pump? any write ups?