tuning or egr issue?

[Tsgs69400]

Ok guys,
For about the last couple months I have been noticing that the egr on my truck has been open while im driving more than it has bee shut. The difference in power is dramatic.
At least I think it is EGR...the exhaust note completely changes.
When it seems to be open it will build up to 35lbs of boost really fast and not really go anywhere. I have been running the spartan 210 tune almost exclusively for a year. I just switched to the 175 yesterday and it didn't do it as much though it has opened while driving. Also on the 210 I had been running it for about 3000mi without reloading. I had previously tried to reload it and it didnt help.
I also cannot get a reading for the egr duty cycle on the dash daq. I previously did. Nothing has been changed on the truck and it has not been serviced.
DO I just need a new egr valve? I am getting PO'd and I'm ready to get an egr block off.

[08stroker250]

The EGR valve should not be open at all while driving with the 210 tune. It should only cycle during idle with the 210, 250, 275, and 310 tunes. Sounds like you have a EGR valve issue

[Tsgs69400]

ya thats what I have been thinking. I just wanted someone to verify my diagnosis. HAHA thank you