Re: mechanic says it's the Trigger.
Maybe it is time to set the idle mixture screw and idle screw properly. Usually, the idle mixture screw should be set to 1 turn out from slightly seated. The idle screw should then be set to 1000~1100 in neutral on muffs. Starting in fast idle is normal but after warming up the engine should idle properly with the control back in neutral. If it doesn't then you could either not be firing on all cylinders or you have misfiring.
Maybe it is time to set the idle mixture screw and idle screw properly. Usually, the idle mixture screw should be set to 1 turn out from slightly seated. The idle screw should then be set to 1000~1100 in neutral on muffs. Starting in fast idle is normal but after warming up the engine should idle properly with the control back in neutral. If it doesn't then you could either not be firing on all cylinders or you have misfiring.