When do you need to change fuel filter?

This is something that really depends on time and or conditions that you drive. If you have an owners manul there will be SUGGESTED times to replace things like air/fuel filters. But check all your fluids like oil an dtrans if you have that type tocheck. You might clean teh throttle plateon both sides with choke cleaner. If it still feels sluggish then have the fuel filter changed and go form there.