Provided you are talking about the MIL Light = Malfunction Indicator Lamp? the 97 Mark VIII is an OBDII computer system. it requires a scan tool to reset / turn off the MIL / check engine light. it requires repairing the fault / problem to keep it off. drl
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
The Mark VIII, a luxury sedan produced by Lincoln from 1993 to 1998, may trigger a check engine light due to various issues, including problems with the emissions system, faulty sensors, or engine misfires. It's essential to use an OBD-II scanner to retrieve error codes that can help diagnose the specific issue. Regular maintenance and timely repairs can prevent recurring check engine light problems. If the light persists, consulting a professional mechanic is recommended.
The "Check Engine" light means that the computer has stored a fault code. You need to use a code scanner to read the fault code. Code scanners can be borrowed, rented or purchased at most auto parts retail stores.
You have to check to see what codes are causing the check engine light to be flickering etc. that will be your starting point. Sounds like oxygen sensors though. the spark plug boots are cracked my 98 had the same problem $3.80 each
If you don't have a scanner take it to Auto Zone or I think even Advantage does it and they will tell you what the code is and erase the code for you.
Disconnect the battery for a few minutes and then connect, resets other things too.
press the reset button
To reset the air suspension on a 1993 Lincoln Mark VIII, first ensure the vehicle is on a level surface. Disconnect the negative battery terminal for about 10 minutes to reset the system. Reconnect the battery, then turn the ignition key to the "On" position without starting the engine. This should reinitialize the air suspension system. If issues persist, check for leaks or faults in the suspension components.
Check Crank sensor located in the block near the ac compressor
See if the button in the door jam is stuck and put WD-40 on it and work it in and out, and of course check the light bulb.
Check the basics, With an inline spark tester ($6-8.00) check for spark. Does the fuel pump make noise when you turn the key (whining noise)? Is the fuel getting to the engine?
To reset the computer on a 1997 Lincoln Mark VIII, disconnect the negative battery cable and wait for about 10-15 minutes. This allows the system to clear any stored codes and reset the computer. Reconnect the negative battery cable, and the computer will reboot, returning to its default settings. Make sure to check for any persistent issues that may have caused the need for a reset.