Okay, so my rpm gauge suddently stopped working the other day, It works when the motor is cranking but when the car is running its not registering. I'm gonna look around the trailing coil to see if its a ground or somethin. Anyone else have any ideas?

 

When mine wasnt working (along with my temp gauge, and stock boost gauge),
I took the cluster off to find that all the skrews looked slightly corroded. I went to a salvage yard and grabbed another cluster. Used the skrews from that one and now the temp and tach work fine... still no boost gauge tho.