I've been working on a new tune with Lito for the past few weeks, and there seems to be a fueling issue that we can't get around. Whenever I reach full throttle the pressure drop across the injectors plummets, and then oscillates back and forth pretty widely. Similar behavior with the fuel pump duty cycle etc. I have a few logs from the drag strip this past week; it behaves in a similar fashion on the street shifting at lower rpm. The pcm freaked out in 4th gear and added a ton of timing (ramped up to 32 degrees), ignore that part. We've gone through quite a few tune revisions that haven't seemed to solve it. Has anyone seen a mechanical issue that causes a similar issue? I'm running an unmodified GT500 dual fuel pump and ID1000 injectors, with a 2.8 L Kenne Bell, 18 psi of boost. The rest of the fuel system is stock. I had a boost a pump hooked up pre-FPDM, but disabled that at Lito's request. Running pump gas, 93 octane.