2015 tundra 2wd sr5 2k miles total has had a blower and pulley on it since 700 miles.. last week ended up on the dyno at hpp in Lewisville tx and truck put down 474/511 at the wheels lean as all get out.. first 2 pulls were 466 wheel at about 13.1-3 afr last pull was at 12.8.. installed a aem wideband bout 5-6 inches below the stock front af sensor and on my pulls in the 1st gear I am in doesn't matter speed ect it will sit 12.5-6ish then when it shifts its 10.8 for the next few gears.. I don't get it.. unless the computer cant keep up and is lean in that 1 gear where it super heats the cats and is dumping fuel to cool them off why does it run pig rich after that? this was with all traction control turned off.. the only other idea I have is torque management not really giving me full throttle ie not running as rich as it should?... also my part throttle aft is in the mid 13's under boost on the dyno it hit 9lbs.. runs really strong.. running idk24's all water and water wetter in the I/c set up... and 93 octane.. no air leaks no codes have data logged it with a techstream light scan tool.. even pulled the fuel pump back out to make sure the o-ring on the pump was right.. any help will be great!!!!
yet another supercharged asp pulley and bad afr thread!!!...
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load in 1st gear is low so afr need not be rich and torque control is probably dialing it back.since you're seeing 10.8 in the other gears shows that ecu is doing it's thing and getting enough fuel.you're a bit rich on the top but at least you won't damage anything like that.
you're putting down good numbers though.
you're putting down good numbers though.
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