Welcome Joey!

A quick guess is that your problem lies in the number 4 cyclinder's COP (Coil Over Plug). The coil is malfunctioning causing a misfire in that cylinder, which is what the vehicle's computer is telling you when the check engine light flashes.

If your mechanic's fix coincides with this diagnosis are amazed at why we know what the problem is and what cylinder it is in, check back with us andwe'll tell you why we know.