I do have it, thanks. Someone linked me to it earlier and I searched around in it for the P0087 and the P00C6 seem to point to the HPFP or LPFP typically, but the low rail pressure could be caused by an injector stuck open. Not super clear on how I can determine if an injector is stuck open without just changing it an seeing what happens.
From what I can determine by reading the linked document is the P0087 and P00C6 codes are indicated of insufficient feed pressure to the fuel rail, and the sensors involved are the FLI (fuel level input), FRP (fuel rail pressure), FVR (fuel volume regulator, solenoid on HPFP), and Lift Pump (LPFP). I'm still leaning toward injector as my problem is a single cylinder and I've found three other forum references to the same symptoms and injector was at fault. I think a stuck open injector is plausible to cause low rail pressure if the fault is extreme enough.
The parts I ordered (injector, LPFP, and FPCM) will all be here Wednesday. I'll try swapping the FPCM first, but if that doesn't do the trick I think the injector on cylinder #1 is my next best guess in terms of throwing pars at it. If all three of those parts don't fix it, I suspect a compress test is in order before ordering a HPFP.
Any insight is openly welcomed. Thanks to everyone in this thread. I couldn't have asked for a better welcome to the EBPF community.
Quote from: FoMoCoSHO on June 24, 2016, 06:06:58 PM
Do you have the OBD troubleshooting guide for your year?