Okay so I finally got some scanning in with the 3" DP on (high flow cat, no U bend). Other mods are DHP 1.0 and FWI. Still have KR as high as 4*+ up top. My o2 drops as low as 895 at times, and never makes it above 925. LFT keeps staying locked at 10.9. No vac leaks that I've been able to find. Fuel filter is less than 6 mths. old. Don't have a tuner or access to one (unless somebody wants to help me out) but I don't think it's a tuning issue anyway. With the stock PCM, both my ZZP's, and the DHP the car has always been lean. Fuel pump on it's way out? It is noisy. I'm stumped and getting frustrated. This thing never seems to have enough fuel. Most of the car's probs. are sorted or are about to be. I just need to be rid of this fucking knock.