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
Check the EGR vavle
If the check engine light is flashing when the engine is running , that indicates that an ignition misfire has been detected
If the check engine light is flashing every second or so with the engine running that means an engine cylinder misfire has been detected
How can I start the engine on a Lincoln town car. I accidently caused the horn to keep blowing and I kept pushing buttons on the remote until it quit blowing. Then the anti theft lights were flashing on the dash and the engine would not start.
If the check engine light is flashing with the engine running , that means a spark plug misfire has been detected
If your check engine light is flashing on and off with the engine running an engine cylinder misfire has been detected ( avoid heavy acceleration or deceleration while driving until repaired or you can damage the catalytic converter )
Probably your engine thermostat is sticking open
Decreased performance and fuel mileage.
If the check engine light is flashing on and off with the engine running , that means that an engine cylinder misfire has been detected
If the check engine light is flashing with the engine running that means that an engine cylinder misfire has been detected . You can still drive it in for repair , just avoid any rapid acceleration or deceleration because you can damage the catalytic converter
If the check engine light is flashing a spark plug misfire has been detected - have it scanned for trouble codes to diagnose and repair as soon as possible
If the check engine light is flashing that means an engine cylinder misfire has been detected . You can drive it in for repair , just avoid any rapid acceleration or deceleration because you can damage the catalytic converter