Well I used to get 32-33 mpg every tank, and >36 if strictly freeway, so around 400 to a tank. Now I get 270 to a tank. I do have lower comp pistons than stock, but I have a gut feeling that it's more related to the poor injector performance at low fuel pressures more than anything.

I changed the O2 sensor, it works fine. My EGR is attached and functional. My air filter is filthy but I don't feel like changing it. I have a 16g on the log manifold. Boost controlled with Greddy e01. MAP clamped with a FCD (that's really the only variable that recently changed, before I was using the emanage to clamp volts to 4.64V.) The MAP sensor is brand new.

What gets me is I've had this setup for years, and never had this issue before. I just can't see what's triggering open loop! I thought it might me a TPS shorting out and telling the ECU I'm in WOT, but that doesn't seem to be occuring per the scan gauge. I ordered a blue tooth OBDII reader for my android phone so I'm going to start logging things.

2gnt: '99 RS-T, killed by a toyota, pending rebuild...
Daily: Volt
Daily #2: '99 EVG ebike- STOLEN by PEDRO