By passing Air injector pump 2014 4.6 tundra P0418

Hi everyone over the years I have searched and read comments on here without being a member and they have improved my knowledge in trouble shooting the Tundra issues. Today I ask a direct question my Tundra 2014 4.6 sr5 has no engine check light but scan shows one code P0418 and felt low acceleration at full throttle. Will by passing the air injector pump improve acceleration? I recently drained and replaced gear box oil, do I need to also drain the final drive differentual oil too. Mileage is about 53000km. Your ideas are most welcome. Thx

 

@Machine-in-me*83 I know a little late in the reply and most likely already resolved the issues but wanted to answer the question for all future readers. The Secondary Air Injection System is 100% emissions related.
Mechanically speaking, the secondary air injection system only affects post-combustion operations, and so a nonfunctioning SAIS doesn’t impact engine performance or fuel economy. Therefore, the sole function of the SIAS is emission reduction. That said, the SAIS will only run on a cold start when the vehicle has been sitting for at least seven hours. Even then, it will only run for 30 to 90 seconds to allow the operating temperature to be reached.

It would be more accurate to state that the SAIS reduces emissions at most once every seven hours for 30 to 90 seconds. Outside of that specific time period, the SAIS is inactive. Consequently, if the secondary air injection system is not working properly, exhaust will be richer after a cold start until operating temperature is reached. For more details about the SAIS system please read the forum link below.

https://www.tundras.com/threads/what-does-the-secondary-air-injection-system-do.113683/