The Miata.net Garage section (http://www.miata.net/garage/) has a wealth of information on all things Miata related.
This is for a gauge-face install, which requires you to remove the gauge cluster, and includes complete instructions:
http://www.miata.net/garage/gaugefaces.html
Behind gauge cluster, right side of steering column
Yes
The entire cluster must be removed to replace the lamps. The procedure is as follows; Remove the two screws at the top of the clear cover. They go up into the instrument panel. Remove the screws underneath the left panel for the light switch (one screw) and right panel for the AC/Heater control (two screws). Remove the screw at the top of the panel behind the Heater/AC control. Pull the entire assembly forward. Remove the screws holding the instrument cluster in place and tilt it forward. There are a total of 6 lamps to light the gauge cluster. Four across the top and one on each side at the bottom. These are larger than the others. Turn the socket assembly counter-clockwise and pull it out. The lamp and socket are one piece and are type 194. Install new lamp and socket assemblies and turn clockwise to lock them in. Reinstall the cluster. For the digital gauge cluster there are nine lamps across the top of the cluster, but none are used for lighting.
Answeryou probably need to replace the float or sending unit. which means taking the tank out.It"s more than likely that your instrument cluster needs replacing. This happened to me, bought one at salvage yard for $55.00. If one component on dash stops working i.e-gas gauge temp. gauge speedometer, the whole cluster needs replaced.
Try this;http://www.miata.net/garage/FuelFilterChange/index.html
You need to remove the cupholder*4 screws* and lower the cigaret lighter and cup holder underneath are two bolts,remove the two bolts.Remove the fuse cover and you will see four screws remove the two outer screws and pull out the radio unit and the vents. When you remove the radio cluster will show two screws holding instrument cluster bezel.Near the the door is a vent held by clips use a flat screwdriver to remove the vent.Just pull the instrument cluster bezel and it will come off.
DNA Speedometers are the BEST
Miata owners typically replace the transmission fluid with 2 quarts of MTL Redline Synthetic Gear Oil.
im not 100% sure but the 93 and 94 are almost the same car so i would assume it would fit but I've never tried it so im not sure.
There are some rare LSI convertable models that have a tach. That cluster will go straight into the base model Metro 89-94. All of the connectors were already in place so all I had to do was simply connect them.
10w-30 or 5w-30 oil, depending on your climate.
The meter refers to gauges in the instrument cluster.