I don't see how he could have bad boost pressure to the IP if he still gets 14 seconds to 60mph. Reduced boost signal should hurt his acceleration greatly.

So it is more of a throttle responce issue??? Perhaps the throttle linkage needs looking at.

As I recall, disconnecting the overpressure sensor at the intake manifold DISABLES the boost. You have to bypass the overpressure relief valve at the firewall.

Bruce McCreary