Cutting out when boost builds

[slow4g6392tsi]

As the title says, my car cuts out when boost builds. I was running 15psi the first time it happened and before that it ran 15psi or more just fine for maybe 6 months. I was driving and floored it in 1st gear and around 4k rpms where it would normally start to pull its hardest it just violently cut out and the rpms dropped to maybe 3800. I eventually turned the boost down to about 12psi and it went a little higher maybe 4500rpms but then still violently cut out there. I turned the boost controller like all the way out (9psi) and now I can make it too about 5k rpms. I cannot figure this out.

So far all I have done is a BLT and changed my plugs to ngk bpr6es (because I turned the boost down) gapped at .28. Any suggestions would be appreciated, thanks.

 

[Rob10_99]

Any way to log this? I would stick at the same gap with the same plugs,
No boost leaks? sure sounds symtamatic of that.
I would almost gap them to .22 or so and see if the problem is still there, it would help narrow your issues.

Anything else you have done to the car recently? Might be your air sensor taking a dump on ya who knows.

Caps on your ecu look/smell good?

 

[slow4g6392tsi]

Hmm, do GM mafs fail often. Well then again, everything on this car fails often. I have link v2 but don't know how to put the log on the computer. I am not a member on the wikki thing yet. Are the numbers or code or whatever I need to become a member there on the dsmlink chip or the disk because I lost my disk. I guess I will go check my ecu tomorrow.

Oh I thought I should add right before it starts to cut out it will pull a lot harder for a second even though the boost is already fully built up. And when driving partial throttle my stock boost gauge keeps spiking from knock.

 

[slow4g6392tsi]

Forgot to add. All of my plugs looked lean. I mean I am not champion at reading plugs but they looked white so yeah.

 

[MrBoxx]

We need to see a datalog of this happening. Save the file and try to post it as an attachment.

 

[slow4g6392tsi]

K, I will try that right now.

 

[slow4g6392tsi]

When I try to browse for it as an attachment the only ones that show up are the sample runs that come with link. Anybody know what I am doing wrong?