HELP! Have a Brisket On, Left to Right Temp Difference

Last brisket I cooked I had the damper open all the way, I monitored grate temps and the grill cooked evenly with only 5-6 degree difference at times
I have one on there now and no mater how far in I keep moving the damper my temp is differentiating 25-40 degrees! The right side of the grill is running way hotter
The only difference is the pellets are hickory and not cherry/pecan mix
Any ideas? I have 10 people coming over for dinner and do not want to mess this one up!
I have one on there now and no mater how far in I keep moving the damper my temp is differentiating 25-40 degrees! The right side of the grill is running way hotter
The only difference is the pellets are hickory and not cherry/pecan mix
Any ideas? I have 10 people coming over for dinner and do not want to mess this one up!