Originally Posted by etothepii
All of a sudden, it works fine.
Can there be somehting like vapor lock in an lp system?
I don't think vapor lock is exactly the correct term, but there is an issue here (it has happened to me). It's not with the regulator, but with the LP tanks. With tanks that have the new type of overfill prevention device, you have to open the valve very slowly. Too fast and the OPD "activates" and you get no gas.