Turbo Pulsing

[Mark F.]

I got my 2013 SHO a year ago and the only mod I've done is add a K&N cold air intake, it's been great so far. On the way home from work the other day I noticed some pulsing about 1500 RPM on gradual acceleration, or if I give it gas at that RPM about 55 MPH. It also seems to dumping the blow off valve before it's supposed to. Like if I give it gas hard I hear the woosh of the air going through the intake then it releases when I let off. It doesn't do that all the time and sometimes it doesn't feel like the turbo does much at all, I hear a lot of air noise (no turbo sound) and it revs really high and doesn't accelerate like it's supposed too.

Before I take it in, what do you think this might be? I think it *might* be a bad blow off valve (if that's what it's called), but I don't know for sure. I did some searching, but came up empty.

 

[glockcoma]

Check for boost leaks/popped off hoses in the circled areas.
They frequently pop off if not clamped.

 

[glockcoma]

Also check connections at the turbos outlet.
The rubber bellows rip, just looking at them doesn't always give it away.
You really need to get your fingers on them.

 

[Mark F.]

Thank you so much! That was the problem. It was the small hose that connects to the plastic duct in top circle, ironically it's the connection without a clamp. I popped it back on and got about a mile down the road before it came off again. I put a clamp on it this time, the hose is stretched enough that it didn't want to stay on the barb.

Nice username BTW, I have a bit of a Glockcoma problem myself, some .40 or 9mm usually takes care of it.