I got a set of testo gauges in the service truck but i believe them to be out of whack. I also have no idea how to change refer etc. No one else in the company wants to use them or knows how.
Do I just use ice water to make sure the temp sensors are right?
Just use virgin refer to make sure the psi is right?
If you found them on the ground what steps would you take to make sure they are 100%?
I have nitro them and they don't leak. They are the lower model with sight glass not 100% of model but I know they are under $300 so lower end.