I tried searching for this problem, but I found a lot of hits for this kind of thing happening with carbureted models, not fuel injected ones. Also, this does not seem like a fuel delivery issue to me.

Basically, what happens is that I will start up the machine, and it will idle just fine. When I push the throttle, most of the time it goes just fine, no issues.

But once in a while, so randomly that I can’t even give you a percentage, the engine will just suddenly stop when I start pushing the throttle. It doesn’t bog down and act like a fuel-starved beast and then finally quit. There’s no time to let off the throttle, it happens instantaneously – like in the blink of an eye. It’s idling fine one instant, and then (blink) and it’s off. it always starts right back up again afterward.

Do you have any idea what this might be about?
It has been to the shop for this problem, and they were clueless.

Thanks in advance for any ideas.