05 Jeep Liberty sport power issue

I was seeing if I can pick someone else’s brain about this issue. My Liberty doesn’t seem to have the power it once had. I’ve had it for a few years now and when I bought it, it seems to have a little “snap” when you got on it. Now it just seems a little doggy on acceleration and power in general. Would this be possibly a fuel system issue(filter,injectors,pump)? I’ve done all maintenance on it and have never replaced any of these things. Just wondering if anyone has had this issue before. Thanks

Welcome to the forums.
Did you replace the spark plugs with these exact NGK copper cores ?
These are the only plugs the Jeep likes and they should be replaced every 35K.

If fuel pressure is suspected, get a fuel pressure gauge (hooked into fuel rail) & report back the psi, key on then running, and then off for 10 minutes as a leak down.

I agree, change the plugs. Try some Gumot fuel injector cleaner with the P.E.A, my 06 was a little doggy and it brought it around.

do a carbon removal treatment of the intake and valves. that will wake it up.