Hotloop Temperature Freeze and Engine Output Freeze

[Veilivel]

While I’m not sure when exactly this happened, it was definitely soon after I stuck another can in the loop and closed the purge valves.  I’m certain there was still gas being pumped in when this happened; I don’t remember if I ever tried putting even more gas in though.  

Since you said it happens when a pipe runs out of gas, I wonder if it could be related to the purge valve being closed by any chance?  I dunno