Truck stall when coming to a stop

[barkleydave]

I know this has been covered a lot but it has me baffled. Truck has been doing fine no problem nice idle and never died when braking to a stop.

Lately it was doing it once in awhile now it does it every time! Even with clutch in braking to a stop sign and she just drops off. Idle mixture I have adjusted several time and no change. So why now? Is the float sticking?

Made no changes internally to the Zenith

Thanks