It sounds more like dirty throttle bodies or the tps is out of whack or maybe even bad.
If you haven't cleaned the throttle bodies, I would start with that.
Then do a tps reset.
Key on, kill switch on, engine off.
Do a slow ten count while rolling throttle to AGO.
Do another slow ten count and let throttle snap back.
If neither of these work, the TPS may be bad.
'14 Ness XC