I notice between the healthy, and not healthy runs, on the unhealthy ones, the Fuel Rail Pressure Request is notably lower than on healthy ones. So not only is it getting less fuel pressure, but thats actually what its asking for. I don't know if that means anything. But something I noticed...
I am really tempted to throw a LPFP at it and see what happens. Anyone know if there are any tests you can do of LPFP performance besides just replacing and see what happens?
Also, I thought of something today, this all began to happen after my area got some new gas available, Shell 93, which is about 8-10% ethanol. I ran a few tanks of it, began having this issue, and blamed the ethanol content and it's effect on fuel volume needed, and the fact that I am right at the limit of the fuel system as is. I switched back to Shell 91 0 Eth. which is what the car was originally tuned on, but the issue never went away... Is it possible I overstressed something trying to adjust and pump that increased volume, and when switching back to the known good fuel, it was too late as that component was already damaged a bit. Perhaps the LPFP? Not sure, but does the theory make sense to anyone?