New here, needing some help guys! Bear with me on the long post. Lol I've got an 07 5.9 with 169k on it. 2,000 miles ago I got brand new Bosch Motorsports 100hp injectors, new connector tubes, 2nd gen swap kit with s363, ARP 425's, and EFI Live. Before any of the work was done I was having an issue with the truck white smoking at first start up after I'd let it sit awhile like overnight. My guess was a leaky injector filling the cylinder full of fuel. Since all the aftermarket parts its gotten worse, lots of white smoke, real rough idle, pops like its got a "miss". Does this for about 2 minutes then clears up and runs fine. Doesn't do it every time I start it just when it sits for a couple hours. Is it possible I still have an injector issue with them all being new? Or is my problem something else? Guy I had do the work says its normal for larger injectors and says its temp related but it's done it in 60 degree weather, I think that's just his way of saying he doesn't want to mess with it anymore.

Truck has fass 150 and filters only have 5300 miles on them. Any help is greatly appreciated!

 

It is possible that you got a bad injector. I would run a good does cleaner through the system and double check the torque specs on the injectors and feed tubes. Is there blow by? You might wanna do a compression test too. You can get a block off tool and block the injectors one by one to see if the smoke goes away when you block them. If there is no smoke when you block off an injector, then you found your issue.

 

I'm going to try a heavy dose of injector cleaner in the tank first and see if that makes any difference. Not really any blow by, a littttttle bit of smoke out of the oil fill hole but nothing overly excessive and doesn't move the cap any when you sit it on there. Where can I get my hands on a block off tool and any idea how costly one is?

 

I think genos garage sells them and i don't remember the price.