missing turbine housing stud causing tuning problems

[dsmsucks]

Hey guys I forgot that when I installed my 2g o2 housing that I was missing the stud and bolt. So I have a leak before the o2 sensor!! Could this cause me to have tuning issues?
thanks

 

[olmytsi]

Needs to be fixed either way, so just do it. 02 sensor isn't used at wot just so you know.

 

[dsmsucks]

Thanks man!!
Im not having trouble with wot tune just the fuel trims

 

[olmytsi]

That's probably the cause then or part of it at least.