97 la sabre no power

hi, I got this car steaming from intake leak replaced it! plugs, wires, o2sen, fuel filter,air, etc.. idles great goes good untill you call for power or uphill it dies out and you push on throttle and its goes nowhere untill it hits the floor, it takes off like a rocket you let off and its shifts up and dies again! there are no trouble codes in it. any help would be great tnx:disappoin

hmmm, that peculiar.

Make sure you have the vacuum line firmly attached and with no cracks to the pressure regulator, also check for any leaks at the fuel rail.