[quote quote=13235]All vacuum and boost gauges work the same with a copper coil inside that expands and contracts, so it should be cheap to get fixed. I have an extra one but it does not work and I am trying to fix it.I think the coils get clogged.[/quote]
I believe you are right. I took this one apart all the way to the copper coil and brass. I took all the mechanicals off of it. I held it under water with 15 PSI on it and it was not leaking at all but also not moving the coil. I tried a small gauge torch tip cleaner but it is not long enough. I have the copper coil soaking in carb cleaner now. We will see what happens with that.