Where's the fuel pressure regulator located

If you're asking, you don't know for certain that it's what's wrong with your car. Stop guessing and actually have a diagnostic test performed. Seek guidance at a local shop or with a local technician near you, or obtain a shop manual and the thousands of dollars of diagnostic equipment needed to troubleshoot your vehicle's concern -- also a viable option for some. Guessing, however, is not. PS - your fuel pressure regulator is integrated in your fuel pump assembly. I'm honestly not trying to be difficult, I'm trying to save you hundreds of dollars and getting knee deep into work you can't perform (hell, I don't even do that kind of work - I pay my technicians to do it...) saving you from towing your vehicle in pieces somewhere. https://repairpal.com/repair-shops/kia-repair-and-service-in-palm-beach-gardens-florida