But the gas was able to travel because a valve was stuck open.

But the main problem with valves, especially stopvalves, is that they stick open.

Looks like either a programming error, or a valve sticking open.

If the valve is stuck open, the engine could fail.

Her eyes were rolling around, and her jaw seemed to be stuck wide open.

Instead they saw a valve that was stuck open.

Test readings showed that one of two fuel valves leading to power unit No. 2 was stuck open.

He had no sensation left anywhere, and his eyes were stuck open, but he'd stopped shuddering.

His throttle stuck open and was launched more than thirty feet into the air at a jump.

On many trains, the doors stuck open at every stop, taking several minutes to close after passengers boarded.