Help! R32 gtr no boost

[Sharkus29]

Was tuning my greddy profec spec II boost controller at 13 pounds was running fine then made a small pop sound similar to bov going off and then no boost. Did'nt sound like Exhaust wheel shot out or anything, car runs fine just no boost.


Also its been having hesitation issues at no boost light throttle, and having a stumble issue at medium throttle where it will lean out for a couple seconds under light boost then it will even out and be fine. Help me out GTR geniuses.

[Marus92]

I would think that pop = couplings, but I don't get why you would run lean just beforehand since a leak after the MAF would make you run rich.

[Sharkus29]

The turbo shuffle and the leaning out were happening before the boost controller install. It never leaned out during full throttle either.