some problems.
 

I just bought a 88 rx7 and all the gages don't work except the speedometer and the engine temp. any ideas?

Sounds like it might be more than just a simple ground disconnected.
Get out the voltmeter!

try the meter fuse under the dash,driver's side kick panel in the corner.

Ya I'll have to try that. I was looking at fuses last night but I tried probably everyone except the meter fuse