Change your dwell and FSDO settings to stock for the 2.0 core. Make sure the manifold screw (if you have one, cant remember if all 1.0s do) to stock, and remove feathertouch screw if you have one. Check oring fit on bolt and relube. Maintain your gun reg and try a different tank if the problem persists.
Mustache Paintball on youtube has GREAT videos on maintaining the Luxe amd fixing common problems.
Unfortunately I dont have the 2.0 default settibgs available right now or Id post them, DLX has a downloadable manual on their website though.