Hello: I am having an issue with my 671 turbine smoke unit. When engine is in neutral the smoke unit gets hot and when I put it in gear it puffs smoke for about 5-10 seconds then stops. The smoke unit does not seem to stay hot enough to burn the smoke when the engine is running (I think testing it with my fingers). I bought a new smoke unit on ebay that is reconditioned liquid smoke conversion from the pellets for the turbine engines. I connected it with good soldering added smoke fluid and I am having the same problem/issue compared to the original smoke unit. I am baffled. I even tried moving the power source connection to another contact point on the locomotive for the smoke unit and still having same issue. I also took out the old wire for the smoke unit and soldered in an all new copper wire no improvement. Any help much appreciated. I also have a 2020 turbine, identical to the 671 essentially. The 2020 original smoke unit works fine I have compared the two and all connections are the same. I don't see anything different or anything that I am missing.

Thank you

Thanks for the information I will give those things a try and let you know