[MT-2500]

A blinking check engine light is telling you the engine is missing when it is blinking.
A steady light is telling you have a code.

As said get the code and go from there.
If the code points to a certain cylinder miss fire or miss or injector .
Work on that cylinder first.
Check for good spark plug and good spark to it and compression.
Watch the spark plug for wetness.
If dry plug and cylinder is missing it points to injector or no fuel to that cylinder.
If wet it points to plug or plug wire or no spark or compression.
If that is good check for good injector pulse and good wiring and plugin to that injector.
If all of that is good replace the injector.
If money is low you can replace just the one bad injector.
for 100-200$ USA
MT