New FCA, still misses
 

06 Cummins with edge juice attitude. 5" exhaust from turbo back. K N air filter. 180000 miles. Few months ago started missing at idle. It slowly got worse and would smoke white when it missed. So after research online I came to the conclusion it was the FCA. Well I replaced that and it has gotten a little better but not back to normal. It will still miss at idle just not as bad and still does it every time it idles cold or warm. Any help comments or suggestions would be greatly appreciated. Thanks

Have you done an injector cutout test?

No haven't done anything yet. I'm gonna do an ohm test on injectors this weekend. What is the cutout test ?

must have a scantool to do the test, forgot to mention that