The a/c pump kicks on and off to compress the cold air. When it does this it draws power from the engine. The check engine light for misfire is probably from a different problem like timing or spark plugs
If the check engine light is flashing that indicates an engine cylinder misfire has been detected
If the check engine light is flashing when the engine is running , that indicates that an ignition misfire has been detected
A check engine flashing indicates an engine cylinder misfire
If the check engine light is flashing it indicates that a cylinder misfire has been detected.
A blinking check engine light indicates an engine cylinder misfire has been detected
If the check engine light is blinking that indicates an engine cylinder misfire has been detected
The flashing engine light indicates a severe engine trouble code, for example constant engine misfire. If you pull the code with a reader, you will most likely pull up misfire on at least one cylinder.
You probably have a misfire; Have it checked for codes. Most likely you need a tune up.
The check engine light is flashing due to a problem with the emission system. I flashing check engine light usually indicates a random engine misfire.
There is a serious "miss" or misfire, without more information it is impossible to diagnose why.
A flashing check engine light usually indicates a misfire. You need to check codes to know possible causes.
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 )