92 Olds 88 issue...

Hi! I have a 1992 oldsmobile royal 88, v6. The car was running fine a few weeks ago...it will run great for about 10 minutes of driving then it seems to shudder/sputter...almost like jerking...the guy I bought it from said he had a tune up done a few weeks prior to me buying the car. I brought the car to a oil change shop to see if they could change the fuel filter for me, the couldn't find the fuel filter. I am hoping its just the fuel filter. What other issues could it be? fuel injectors? clogged catalytic converter? a better tune up? I know a little about cars. If anyone can help that would be really great. Thank you. -Chris