Muffler delete equals Rich condition

cavemancan

I did some searching and I was not able to find a similar thread so here goes.

I went ahead and removed the muffler to save some weight and get some good noise. Ever since then I've been running extremely rich. I would say about 280 miles per tank of fuel (I used to average 310 to 340). So I did some research and I tried the "Idle Air Volume learning" procedure but to be honest I am sure I screwed it up:

2003-2011 Nissan 350Z - 370Z Idle Air Volume Learning Procedure | Nissanhelp.com

I can further prove this rich condition due to the fact that I had a dyno on the same day of the muffler delete and the shop tech told me I was running extremely rich.

Dyno:



Notice the TON of torque...I must have a v8 for like 1 whole second...LMAO!!



So my question is am I forced to get a tune? or is there another reset procedure I can run? Did I do the above mentioned procedure wrong? Etc?

EDIT: note that the pull showing the most power is with the filters removed.

__________________
Mazda Rx8 MT Titanium - SOLD!
2009 370Z T-Sport MT Black - Takeda Intake, Swift springs, Rear Camber kit, SS B Lines, FI Exhaust, Z Speed CMAK Flywheel/Clutch Kit, Stillen Brake Cooling.