Are you sure they gave you the correct code readout? According to the 1998 - 2000 FSM P0108 isn't used. The only difference with the 1997 is that it has an EGR while the newer Sportages do not. But those are different diag codes.

While P0108 is a vaild OBD-II code for MAP sensor as I said above it isn't used on the Sportage. I would suggest getting the codes pulled again. I think someone gave you the wrong number.

You can avoid an additional diagnostic fee by going to Autozone. They will pull codes for free.

If it turns out that I'm incorrect and P0108 IS a valid code for the 1997 then I suggest signing up and paying the fee at http://www.kiatechinfo.com and using the diagnostic charts to aid you in fixing the problem.