Have I damaged my GM map sensor?

[Walter Petermann]

Ok, so after trying to sound like the voice of experience responding to 
some of Bruce's questions what do I do?
I bought a GM map sensor and hooked it up to 12 volts! I was trying
to get output voltage vs vac input hoping to use it in my Jag ecms.
It took about 2 secs to notice the output reading over 8volts and figure
out why. I hooked it to 5v and was able to get a nice linear response.
Can I trust this or should I get a new one?

  Walter