Reillo 40 black smoke

[Kesh6]

Hello , I recently replaced the nozzle on my reillo 40 because of a delay firing. This cured the firing problem but the burner is now producing black sooty smoke. The only other thing I did was move the electrodes, I don't know how critical that is could it be the problem . Thank you for any help

 

[AC Power]

Sounds like you've incomplete combustion. Ensure your fresh air intake is clear.