Hey,

To "check" and repair the collapsed tank, I simply clumb under the car and applied air to the fuel tank vent like while leaving the tank filler cap on.

I used an air nossle attached to our in-garage air system...140psi but you don't have to worry about blowing the tank if you are careful with the trigger.

Basically just put some in...saw how much hissed out when I removed the fitting. Did it a few more times and put on a GOOD strong charge...few PSI at the least.

It holds way more fuel now...along the lines of 3 gallons if I don't top it up and 6 gallons if I do Total of about 24 can be stuffed in there when really sucking it down low before fillup.

A tire pump would work but you have to find some way to either plug or fill through the tank vent line ...guess you could hoseclamp something up as its only low pressure. Just be prepared to do a lot of pumping