Mine has the same issue. At first I was thinking it was injectors (HPOP or actual injector issues) but now I'm not so sure. I haven't had time to test my valve cover harness connections or the injectors yet. But I have little boost at low rpm's - but as my rpm's increase - so does the boost. Anybody have any ideas as to what could cause this? Would poor fuel delivery cause it to "seem" like poor boost pressure?
I warmed my engine up to running temp - then unplugged the EBPV in the open position - I read on here that this would stop it from closing at all. Mine used to try and stay closed until the motor got up to 170 degrees - I got tired of fighting it until it reached regular operating temp.
It used to HISS loudly when it was working - now there is no hiss at all - ever - just no boost until 1700 or more rpm's.
I did the same thing unplugged it and I got no change, when I pulled the valve off some how it welded it self shut I had to hit it with a hammer and bar several times to get it to brake open, sure enough that fixed a lot of issues with my drivability also the IPR could be an issue
Mine shows no codes - and unless it's below 30 degrees outside (and I don't plug her in) she starts right up every time. I don't hear the EBPV hissing at all - but I will check it to see if maybe it is stuck partially closed or is not moving freely. I thought that if my EPBV was holding back - my pyro gauge would run hot - but it stays at normal temps.