Help. ’05 340 w/ 8.1 Horizons. End of last season I noted the port engine lagged (needed more throttle to maintain same RPM as strbd). Major maintenance year as risers and manifolds were changed. Also had the injectors cleaned. Test run last week and strbd engine good but port still only gets to about 4200. Starts and runs smooth. Everything on the engine checks in spec, just won’t get full wot rpm. At lower rpms (cruise rpm) it lags slightly but then slowly comes up and matches the strbd. I can not afford to just start replacing things willy nilly. It seems like perhaps a fuel issue. Suggestions on where to start. Want to resolve this before the season gets here.