my gauge has worked fine for a month since i got it but now when i shut the car off it the gauge wont go back to 0 it stops at -10 and when running its at -28 or -30 and before it would be at -20

everthing is -10 off wtf??

 

sounds to me like the needle went berserk...if it's not too expensive or still ahve a warranty, id return it or buy another one.......

 

its autometer

 

take it apart....get a vaccuum gauge and recalibrate it yourself....i did it and it works just fine

 

how do you recalibrate it yourself?? can you explain