My 2003 hyundai has very little engine power when u first step on the gas and going uphills

SOURCE: 1995 ford bronco 5.8l surges while going uphill

check vacume lines, knock sensor, and air intake sensor

SOURCE: Loss of power uphills and shifting improperly.

It sounds very much like your clutch is slipping. If the engine revs continue to rise when in gear and the car does not increase it's speed accordingly then if it is a manual car then you need a new clutch.

SOURCE: Kia Rio (2003, manual) losing power

Sorry,

That is tell-tale signs of your clutch going out..almost gone. Be sure to replace your clutch plate, pressure plate, have the flywheel turned by a machine shop and replace the throw-out bearing and the master/slave cylinder or it will need to be fixed again way too soon. Only other thing I can think of is if it has a cable controlled clutch (not likely) these type need to be adjusted from time to time as the cable stretches.

SOURCE: 1995 honda civic lx losing power goin uphill

is there the usual amount of exhaust coming out of the tailpipe?
adjust the timing,
\or your air filter is so bad the computer is leaning out the mixture so far,that you lost power.

SOURCE: why does my car loose power going uphill

YOU COULD HAVE CLOGGED FUEL FILTER AND FUEL INJECTORS.ALSO CHECK TRANSMISSION FLUID.IF LOW TRANSMISSION WILL SLIP GOING UP HILL.NOT ENOUGH FLUID TO BUILD UP PRESSURE FOR OVER DRIVE.

Testimonial: "Thanks alot for ur response i hope thats the problem and nothing bigger"