Power Loss

1998 Grand Marquis the check engine light starts to blink the car loses power for a short time the light stops blinking and then runs fine, It does not apear to be overheating, this may happen off & on all day

A blinking Check Engine light indicates a misfire. You need to have the codes read from the computer to determine the cause of the misfire. Parts stores like Auto Zone will pull codes from the computer for free.