The control valve is the weakest link in this assembly. I work a lot with hydraulic piston pumps and they last pretty long. The control valve has rubber sealings on the shaft which tends to leak after X miles or years.
Yeah, seems like your HPFP has died. LPFP is bouncy as well but that doesn't caused the HPFP crash like that.I wonder if that could be what's going on with mine. When I start to easily roll on the throttle at low boost, the HPFP just takes a dump down to 200-ish psi and the car does the 29DC Injector Cutoff thing. Both banks of fuel trims max out at 34% trying to keep the cylinders from going lean. I'm assuming that this is an HPFP issue.....right? As soon as the motor falls on it's face and cuts the injectors off and I let off the gas, the HPFP shoots back up to 2,800psi. Could this bad a problem with the fuel control valve? As far as I know it's the original 07' HPFP with 100K miles on it.