Random Ping spike (2000 ms +) every 10-15 minutes.

Hello,

I have been having random ping spikes every 10 to 15 minutes that last for 2-5 seconds. Most noticeable when gaming online. I have attempted to change ethernet port, disabling fire wall, reset router, and restarting computer with no improvements. I have ran tracert to www.comcast.net and get intermittent "request timed out".