I run a FoxPro caller.
FWIW, don't spend more that 20-30 minutes calling, if they've not shown up by then, they probably won't.
Do several stands in a hunt, don't just sit in One spot.
We'll do 4 to 5 different areas in one day, most moves are within 2-3 or so miles of each other.
Look for semi brush areas, Coyotes hate crossing open ground like hardpan.
Of course noise and scent control are important, more so noise, if your banging around, smoking, or wore your favorite after shave you'll never see them.
Slow movements when set up, a yote is looking for whatever animal noise your calling with, it's eyes are looking for fast movements and will pick up on you quick.
We generally hunt afternoon up to dusk, sun in our face.
If the Sun is to your back, it makes you easier to spot.
ETA, other odds and ends...
Camo is important.
When calling, go for quality not volume, doesn't need to be earsplitting.
If you shoot One, don't jump up and run over, more than a few times there are others coming in.