ok I installed a interceptor yesterday and the boost gauge worked just fine. Today I am going to lunch and i noticed that the boost gauge quit working. if the needle is at 0 and staying there if the car is on or off.

Any suggestions?

 

how did you wire the interceptor?
Fuse check?

 

fuse or buy a new one

 

Which fuse is it? I'm at work and cant check it. The interceptor is wired to a spare fuse in the box. I used a add a circuit fuse

 

Really weird but I got off work driving home gauge started working again. Checked connections and all was connected properly