You don't have to exit the bunker, just wait for the elevator to come all the way up, then change the value back to 259200, after the initial search for the value , you never have to leave the bunker again , unless you mess up the value
I'll have to check next time I play , I plan on "restarting" the save anyway, so that I can upload it if someone wants , so that it would be more organized I feel.
Yeah the gas tank kept eluding me as Well, i ended up downloading one of the saves with it completed , but the base imo is terrible , so I have been spending time sorting and rearranging/ color coding
There is a tutorial video, its in Russian, but its pretty easy to follow , if you watch it and still have an issue , let me know I'll try to explain it
https://androidrepublic.org/forum/threads/last-day-on-earth-hack-time-bunker-alpha-1-5-7.40142/
It still works , try to make sure you have to load a screen in between changing the value it seems to work best that way. For me , right before I go up the elevator, I change it to 1 , once I have reactivated the terminal and the elevator has risen all the way, I change it back to the default...