1996 honda prelude 2.3 L si none vtech cuts off while driving.

I have the car scan at auto zone there were no code. while i am driving on highway around 50/mph plus it will start to cut of and comes back.

same thing happens some time on low speed. and car will shutoff then i put the car in N while it is rolling and will start the car. it will start right up or some time 2 to 3 time i have to try. also happens while getting up on even a little hill. the car is automatic and shifts fine

i have it checked install a new radiator new distribute TD77u new flue filter cable and plugs, the auto shop told me there is no code.