95 honda civic swapped D15b7 is sputtering randomly. Still has the p28...Up hills mostly and in all gears at low rpms. Things change out to new; fuel filter, distributor, rotor, cap, 02sensor. Ive heard fuel regulator but car doesnt seem to be rich or lean. Also injectors but i dont know the symptoms of that. It runs and turns on fast. Idles at 1 and no flux. Put in seafoam last week. I swapped out the ECU for a auto p06 and it went crazy. Idle jumped and it sputtered worse. Couldnt barly drive the car a block. Which is strange cause ive seen plenty manuels run fine of auto p06.

 

swap it back to the old p28 and run 91 in it my car was having trouble but then i started running 91 in it and the sputter andd everything went away