Ok, so I was having some power issues and replaced the plugs, wires, air filter, and changed the oil. Still having issues so I did the timing and checked the tps. The I got 5.6k at WOT and out of range at idle, which leads me to think it's bad or on its way out. I'm not sure. Anyways, here's the real problem. The car idles very smoothly, but when I get on it to go up a hill the car hesitates and loses power. It almost feels as if it will stall. When i let off the gas it almost breathes a sigh of relief and seems to operate better. I'm confused. I checked the wires and they're hooked up right, the timing is correct, and I'm pretty sure there are no vacuum leaks. Please give advice if you can. I've been searching all morning and going back and forth from the computer to my 7.

 

Your TPS guess is right on.
Using test lights or voltage at idle readings will get your idle setting perfect, but you could still have a worn out TPS resistor.
-The golden test:
Unplug the TPS connector.
Clip a cheap analog (needle type) VOM on the orange & black pins.
Set it to the 1K Ohms scale.
Hold off the throttle & work the short range TPS plunger in & out.
You should see a smooth sweep from ~0 to ~5K ohms.
Any bad spots or drop outs in the stroke - it's bad & will give fuel cuts at part throttle.
(Before you toss it, try spray contact cleaner between the sleeve & plunger.)
- Then set it:
Find the fast idle (warm-up) cam & push it back so the throttle sits on the hard idle stop.
Adjust the setting to 1K ohms.
While holding off the fast idle cam, open & close the throttle a few times to see that the 1K setting repeats.