I have a 2000 0lympia and it started running rough [ very low dle].then some times it idles fine ..when it idles fine Ican push this button on a round device that has heater hoses going to it on the right side of eng.(fuel Reg???] and It starts to run bad and very low idle Like when it acts up for me any tips thanks in advance... Ski

P.S. It does misfire like plugs or wires ALmost like vac...