Engine noise

2015 Tacoma 4.0, when you turn off the motor there is a "very loud" sound that comes from the right side of the engine compartment, lasts about one second. When turning off the motor people will turn around and look wondering "what was that" The dealer said it has to do with an emissions pump and is normal!! Anyone with the same problem?

 

being talked about in this thread https://www.tacomaworld.com/threads...d-when-you-1st-touch-it.391802/#post-10792919

spoiler... it's the air pump and the noise is normal

 

Normal.

 

My 2-15 4.0 Prerunner does this, but it's the opposite of your situation. I get the noise about 20-25 secs. after starting the engine first thing in the morning. I've read it's the air pump.