what's wrong with my car on 1995 Jeep Grand Cherokee

I have 1995 jeep grand Cherokee 4.0l 6 cylinder 4 wheel drive quad trac stars up perfectly fine without missing a beat. it has no problem switching gears and all my fluids are filled. the check engine light or any light isn't on however it will accelerate over 15mph please help me what could be the problem

Asked by for the 1995 Jeep Grand Cherokee
So what's up with your car
What symptoms are you having?