I recently bought a 2001 cummins with a nv5600, the previous owner told me it had had a smarty in it before but was removed and put back to its stock settings. I have a quad adr. to put in the truck but do I need to get my ecm flashed because when I start the truck it will have a puff of smoke come out. should I get my ecm flashed before putting the quadzilla adrenaline in or will I be good to just put it in? opinions welcome on either quadzilla or smarty as well. thanks

 

I would leave it as is and enjoy

 

Every time I look in my mirror when i start mine I see a puff of smoke, also seen others do it too. I think you're okay there.

 

Yeah I'm pretty sure the puff of smoke your seeing is perfectly fine

 

As long as its black smoke and not white smoke you are good to go.