WTF Scanmaster problems I think

[CHANCE]

Hey I was trying to find out whats wrong with my scanmaster when I'm driving my car under no boost my readings jump all over the place one minute it will be reading O2's the next it will jump by it's self to temp and then to MPH ect and then back to O2's or the face will look like this ---- ---- and it will show anywhere fro 10.0 to 57.0 degs of knock under no boost what gives

 

[TurboBuRick]

Did you check the connection on the data wire??

 

[CHANCE]

Yep and last night it just shut off by itself and this morning when I turned the key on it came back on I think it's just old.