I have to ask, how long since a tune-up? Are there any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader that will check manufacturer specific codes as well as po codes.
As far as the throttle position sensor, you can check ref voltage--ground and signal using a digital multimeter. With key on, hopefully, you can get on the signal wire, move throttle lever up and down/open and closed, see if voltage signal moves smoothly. If it does, I don't think that sensor is the problem. I haven't looked at the wiring diagram for that sensor?
The maf sensor seems to be a common issue.
At the top of page is a link for "repair guides", take a look if you have time, some interesting info.
Saturday, June 25th, 2016 AT 11:15 AM