I don't think so. If your CRV was venting all the 2ndary, you'd get a lower pressure after the transition, even if the primary was spinning like a **** (which it is). Take a look at the turbo diagrams. The exhaust can't choose to push the primary turbo faster than the secondary once the prespool control is open. But it's a good theory, you might be on the right track, i just don't think it would be CRV. Although, a fucked BOV could cause some damage since it'll vent everything, but the turbos would still want to make 10lbs. If they're only holding 4psi, replace them.