Zerotohundred

i have a honda civic so4 with d16a non vtec inside..auto transmission..
-recently my car is having jerking problem at 3-4rpm..firstly i suspected it might be missfire problem.so i replaced new plug cable,spark plug,distributor cap..but the problem remains,i even swap another distributor as well as ecu,but it still remains.
-later i tried to use ron97 fuel and the jerking problem gone.but after 3days it started to happens again.fuel consumption also bad..full tank of ron97 only able to get...