It never hertz to check+ its the only thing that is going to help us without guessing.All you need is a paper clip in substitute for the scs service connector 07paz-0010100 and counts some blinks on the check engine light.Just jump the paper clip into the 2 wire blue connector under the passenger side dash and turn the key on from their count some blinks.Use the attachments below it takes some time to get used to the counting and if you mess up just turn of the key and start over.

O this is all lude stuff so it should work.

If we have no codes i would guess some thing to do with the throttle body.I would get a spare throttle body with the throttle position sensor on it a swap em.