01-29-2023, 10:24 AM
If the burner puffs on start up, it puffs once. If there are continued puffs, you have a problem. An air leak into the supply fuel line will cause a white smoke problem. But that leak is usually continous, not puffy.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area