Might help to know what make/model og reel.
All have different ways of adjusting the spool tension.
I find, in general, if you adjust the tension so that when you hold the rod with the tip pointing straight out, and the lure attached that you will be chucking, then hit the release and slightly raise the tip, the lure should, smoothly descend to the floor.
Depending on the reel, if it needs adjusting, you can slide the spool weights, adjust the brake or click the centrifical brakes in or out.