Nissan Frontier 98 choking in 1st and 2nd gear.

My truck starts ok! When I put 1st gear it chokes a little but keeps fine until next red light! The idle is ok! When I put 1st gear back it chokes more and the 2nd gear also chokes, the 3rd is fine! In the 3rd red light me Check Engine Starts flashing and the truck keeps going but shakes and choke a lot, I already change gas filter, and changed the oil! And put a Fuel Cleaner. After cooling down it happens the same!