alright, First I do have a CAI and am aware that it can cause po171 codes, the only reason I am asking this is because the code didn't show up until after I did the stg2, and because the vacuum at idle seems a little high -17. I have the bolts on the supercharger torqued down as hard as I can with one of those swiss army knife style allen wrench sets, Does it need to get tighter than that? any suggestions?

 

I doubt it, I think you should try to clean you MAF and clean the TB plate to get all of that oil then see where that takes you. I was getting the cold and one of the problems that caused mine was there were so much oil gunk on my tb plate that it was sticking open at times.

 

I doubt it, I think you should try to clean you MAF and clean the TB plate to get all of that oil then see where that takes you. I was getting the cold and one of the problems that caused mine was there were so much oil gunk on my tb plate that it was sticking open at times.

btw can you run a 39 injector on stage 2? I thought it was 42.

 

the throttle body and maf have been cleaned, the 39# work on 3.0 and up

 

anyother input on what it could be? vacuum hoses look fine

 

Did you have the pcm flashed for the stage 2.
If not there lies your problem

 

The way you torqued the supercharger down is not optimal.

I would loosen the bolts and then torque with the proper tools to 18 ft lbs. -17 to -20 vacuum is fine. If you suspect a vacuum leak spray carb cleaner around the intake to head and supercharger to intake and around all of the vacuum lines. If the idle raises you found your suspect.