GSRRacer: How/where do I hook a fuel gauge to the rail? Furthermore, doesn't the filter-top fp gauge measure pressure from the filter outlet (after filter element) down to the injector nozzle point? If that's the case, then yes, pressure is true there.

Idle pressure and off the line performance seems ok, but when I open the throttle, it seems like pressure rise rate isn't keeping up. However, if I raise the rise rate on the rugulator, the car bogs (too rich) off the line.

Lynxs: Yeah, fuel's definately gettin' through the filter and there doesn't appear to be any signs of leakage. I felt the same about this scenario being on the unlikely end of possible theories, but as mentioned above, it's weird how I've had all the infinite adjustments down to where a slight adjustment was either too lean or too rich...

...that was with the OLD filter. Just yesterday, I noticed quite a bit of difference with the new one. First, the pump primes half as loud (a good sign of improved flow) and the car no longer hesitates off the line on an incline.

So far, thanks you guys for chiming in. Happy to receive further suggestions. However, since the filter install, things seem to suggest new adjustments to the fuel delivery is required before making further judgement.

Adub