2011 4.0 what is it?

Just wondering what this is? Excuse the dirty bay and chewed up oil cap.

 

Good question. Someone here will know. I've just thought of it as a pulse dampener or "snubber" of some sort.

 

I believe i read the same somewhere. Essentially it smooths the vacuum pulses out to the evap system.

 

This..... It's called either a vacuum reservoir or vacuum surge tank and is part of the evap system.

 

One way valve for evap

 

Thanks for the replies ladys and gents. Would this be beneficial to replace? I Am just going through and replacing egr and small random expenses that I have neglected over 210k miles.

 

Nope leave it. Also, there is no such thing as an EGR on the 2nd gen taco v6's

 

It is just an empty can. Unless it has a hole leave it alone.

The official name is "Vacuum Surge Tank".
It does exactly that, it acts as a damper for the pulsation caused by the individual strokes of the pistons creating the vacuum.

https://parts.lakelandtoyota.com/p/...MIqZvMrJz37AIVEdbACh0IAwtPEAQYASABEgJwdPD_BwE

https://parts.toyota.com/p/Toyota_2009_Tacoma/Vacuum-Reservoir/63240085/2571950040.html

 

Awesome info thanks.

 

i am having trouble with 2011 tacoma been sluggish and took of Vacuum Surge Tank and mouth blow through it and there was no resistance, anyone, is that normal. Thanks

 

Yes the surge tank is just a hollow can, think of it as a muffler for the EVAP system.
An EVAP problem shouldn't cause any drivability issues anyway.