Pickup Loss

[sambo42xa]

Ok, I did a search for "loss of pickup" and found nothing. I got a 2007 with 51k on it and the only things that have been done to this animal have been new tires, air filter and oil filter changes.....that's it! Once I accelerate from a stop OR going to pass from changing lanes she doesn't have the "pickup" like she used to from new, naturally. I'm hoping I do not have to bring it to a shop since I like to do my own work. So, simple question that I'm sure has been asked on here before that there is a simple answer to but I cannot find it. I found "pickup", but it was for a guitar and marshall amp on here for sale. Any help would really be appreciated. Thnx.
sambo42xa
oh, three door liftback if that matters.