LLY: Still having Rail pressure problems

[mytmousemalibu]

Huh? It's an LLY so the PCV "vents" into the turbo inlet . Anywho, I did a "Fuel in oil" test sugested by another member (press dipstick on white paper and look for a "halo" around the oil. None was present. Just the oil spot.

Opps! Sorry! Well if ya still have the factory fuel filter/primer, i had mine seep ever so slightly at the pump seals, the fuel would be very visible at all, had to look down in the edge w/ a flashlight

 

[Cougar281]

Opps! Sorry! Well if ya still have the factory fuel filter/primer, i had mine seep ever so slightly at the pump seals, the fuel would be very visible at all, had to look down in the edge w/ a flashlight

Well, no dye in there either, but like I said, it only comes about under HIGH rail pressures, so I doubt very much it's on the "vacuum" side of the CP3.

 

[Cougar281]

Well, I'm at my wits end here... Since the "bottle test" showed zero fuel getting past the "valve", and there doesn't appear to be any fuel in my oil, and although I can smell fuel after HIGH pressure "runs" but couldn't find it even with UV dye, is there ANY explination for my rail pressure problems other than either a weak CP3 or bad regulator? My latest numbers are I'm loosing about 1500# at ~62% TP 1641uS, 2100RPM, and that goes up to 4500# at 67%, 2437uS and 2700RPM. Pressure spiked during the shift due to defuel, then dropped back down to 4200 low @ 2637uS. I'm planning a LBZ CP3 and WD modded regulator (I don't want to replace the regulator, then have to take it apart again to replace the CP3, so I'm just going to replace them both with better parts), but it would REALLY suck to get that done and still have pressure issues...