Secondary Air Injection System "fix"

Just came across this thread, I just went through this with mine. I don't think the pump is what we have to worry about but the valves themselves. My valves failed and were horrible and had lots of water intrusion within the system, just like the tundra's. The tundra's had a bad air intake by design for the pump, with ours I think its condensation buildup within the system and it has no where to go. That being said I will probably eliminate the pump filter as well just to be on the safe side. Pictures of my valves are in this thread https://www.tacomaworld.com/threads/secondary-air-injection-switching-valve.381997/page-7

 

Like TX Pro, I cannot find one of these damn things on my truck....was there any answer why as to why certain trucks may not have them? 4.0 4x4 SR5 here

 

What year? Your profile is bare.

 

oooppss Sorry , 11 model, from what I can tell some of the 05 to 15 models had them but some did not, thanks Clearwater Bill

 

IIRC this started in '12 on 4.0's

 

Thank you Bill! so prior '12 a V6 4.0 (4x4 or not) does NOT have them?

 

No authority here, but that seems like what I recall reading somewhere.

I have the 2.7, and have done the mod. Using a Uni filter, not the K&N product.

 

On the 4.0 it was introduced in 2012.

 

Yep

Only 12 - 15 models have it on the 4.0. All 2.7 2nd gens have it.

 

Thank you both for the info, I was not aware it was only 12 to 15 models.

 

From what I know, you are correct. The '12's were the first with them, which is why they're most prone to issues and have the extended warranty. Had mine fail at about 38k - Valves and pump replaced at no cost. My failure was at the valves (which the majority seem to be), so the uni-filter mod was worthless.

 

So your failure was not related to foam filter deteriorating and being ingested into the system, but the actual control valves?

 

Correct. And I believe that's been the majority of people's issues, however they always replace both. I have heard some have had the foam filter issue, but it seems to be by far the minority.

 

My 2014 2.7 is no highway queen. I have had my pump under water several times, and once was stuck for a good 3 minutes with water over headlights. When I got home took pump all apart, aside from being wet, looked fine in there. I don't see what all the fuss is about?

 

We should feel lucky.
Less to wrong and when doing a water crossing nothing to suck in water perhaps.
I'd say it's a win win there!


Why they added it is beyond me other than smog. Which bs.....

 

if you stay out of mud and slop u never need to worry about it

 

How we fix the valve from sticking or clean it out? Also how do we unplug and plug the it back together I'm having a hard time disconnecting them