Nighthawk rs180 lag spikes not being caused by isp

On my computer I keep getting lag spikes that I determined wasent being caused by my iso by plugging my bode directly to my computer and pinging Google. When I'm connected like this my response times are around 10ms. When I'm connected thru my router how ever the speed is the same but randomly the response time is 200ms or more. I'm not sure what could be causing this. Iv tried power cycling as well and that didn't do anything. Is this a common issue with these routers? It's realitivly new but unfortunately I can't really tell if it came like this or not because like a day or two after I got it a storm came in and I guess damaged some fiber lines and had the same issue but much worse.