ok i have a 2001 kia sportage it starts fine and idle normal but when
you drive there is a definate power loss!!! going over 3000 rpm is a
problem  the car will  not go faster than 50 mph and takes alot of
effort ! going up hills is a near impossible  we took the cat of and
same thing no power , i was told there are 2 cats????? also change the
belt 2 years ago and ran fine after also change the filter (fuel) but
we take off the air cleaner and the is power gain so at this point i
have no idea any ideas????