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I just installed a DP yesterday and ran it hard. I installed a BCC last month first. For some reason I'm getting fuel cut at around 17psi. I thought BCC prevents fuel cut? ... When I tried to set up the BCC I could only get a 4.1 V reading on the voltmeter when i turned the screw all the way. Could that be the reason for the fuel cut. Also, i'm not sure if the vsv mode was already done to my car before I bought it. But that shouldn't affect fuel cut, just boost, right?
 

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setting the BCC voltage too low will not cause boost cut, but your car will not be getting the proper boost signal that it needs to pre-spool the #2 turbo and switch over to 12v fuel pump mod.
If you could only get the BCC to 4.1 volts, either there is something wrong with the BCC or the way you measured it. I would double check the BCC per the instructions on mkiv.com with a working volt meter.
 
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I ran my dawg for about a month with just bleeder T before installing the BCC. On several occasions I boosted as high as 17psi, without ever hitting fuel cut.
So yes, it is possible your BCC isnt hooked up properly.
Are you sure it's fuel cut you're hitting, and not just missing (a la overgapped plugs) at high end?
 
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