My 1991 Acty Street EX hold its rpm between shifts, i.e. the engine loses rpm very slowly between shifts, once the engine is at operating temp. I am really new to this vehicle. Etcetera
Maybe this thread helps https://minitrucktalk.com/threads/poor-running-acty.15862/ Check all vacuum hoses. Not sure if same on your model year https://minitrucktalk.com/threads/honda-acty-vacuum-diagram-1995.14400/ Diagrams are here for the parts . you can search by chassis number http://www.epc-data.com/