To fix the AC compressor on a 1990 Mazda Miata, first, disconnect the battery and remove any components obstructing access to the compressor. Check for leaks and test the electrical connections; if the compressor is faulty, it may need to be replaced. Remove the old compressor by detaching the refrigerant lines and mounting bolts, then install the new compressor, reconnect the lines, and recharge the AC system with refrigerant. Finally, reconnect the battery and test the AC system for proper operation.
You dont. You replace it. Leave it to a professional. You dont want to experiment with brakes. DJ FLIP Housepartykings.com
possibley change the valve guide seals
Here you can find the whole instructions how to change your timing belt on a Miata http://www.racecaddy.com/mx5/tech/timing-belt-mx5.html it has good images and it is well explained good luck
Miata's tend to tick a little.You can try 5-30 oil at your next oil change but it's unusual for a Miata not to tick a little at start up.
The Mazda Miata is a fun, easy sports car that can easily be worked on and fixed up. Because it's a Mazda, the parts are not especially expensive and can be found in many junk yards.
Check the ignition wiring, fuel filter(dirty), fuel pump pressure(under pressure), air filter(dirt), and old, worn cracked, deteriorated rubber vacuum hoses. All this according to Haynes Auto Repair manual.
Your AC compressor may be squealing due to a worn-out belt or a malfunctioning compressor. To fix it, you can try replacing the belt or having a professional inspect and repair the compressor if needed.
Fill it up with gas
A simple solution may be to run a higher octane gas. Another quick potential fix is to change the spark plugs. If either of those don't work, it's most likely a timing problem.
IF the system is the same as the Mazda pickups and Mazda Navajo, HeaterTreater has a product that will fix the problem. Mazda diagrams are hard to come by. If you check the pictures on the Ebay listing, you should be able to determine if the fix will work.
It is typically the flasher module failing. A common failure point is a bad solder, as found by Lance Schall. You can find the Flash Module under the dash, above the clutch pedal, labelled "Flasher". You can remove it by unclipping it and pulling down. Enterprising owners can often find and fix the bad solder joint themselves.
You fix it by replacing it.