I have an unstable connection but anywhere I check my ping is normal any tips?

[hugenoobpt]

In the last 1-2 months my Internet has been really unstable causing my games and general connection to behave like I have 400 ping (just an example) but anywhere I check my ping is stable around 70-80 (what it should usually be) any ideas on what the problem might be?

 

[Sedivy]

Are you dropping packets? You can try line quality-ping test or if you want to see how it behaves over a 24 hour period a smokeping test to see if there is a difference from different locations and during different times of the day:
http://www.dslreports.com/tools
That should give you a little better idea. Also, you sure your home network is ok? Do you have a wireless router or a wired connection? Are you sharing connection with anyone else?