ok, so I went to the track, with newly installed dual walbros, fuel line, injectors and e85. humid 85 degrees out. Made 4 passes. Pass 1 , the wideband showed pretty close to what was commanded. After that run I richened the boost ve table up about 5% at full boost (175kpa, 11psi) . Pass 2, afr's looked good except for the very top of 4th gear got lean. So I richened it up another 5% and on pass 3 it got leaner all through 3rd and 4th gear. Didn't change anything after pass 3. Pass 4 got even leaner!
So I get back home and install a fuel pressure sensor and log fuel pressure, I am still having a lean problem but the fuel pressure is stable right where it should be rising 1:1 with boost.
I'm stuck. My fuel pressure is looking good so the only thing I can think of is my wideband is not right or something in the tune or meth injection (already tested it and no clogs , seems to be working fine) . My setup is in my signature.
pass 1
pass 4