Secondary Air Injection Pump failure

Check it now soul funk brother. Free for me, because I have relays and wire and black tape and connectors. https://drive.google.com/file/d/0By7JoJzynrbSSktEc1hxNHdJcTQ/view

 

I prefer plug and play but thanks!

 

Yes, you can completely remove the pumps and plumbing with the GenII kit. There is also no reason to remove the ASVs unless you are already in there or needed the space. As long as the pressure sensors in your ASV are good you will just use those. You are also correct about the pressure sensors being the only part left in the system to fail which is very rare after the fact but a couple have but there was already a hint they may have already been damaged by exhaust. A PSO in a bag is even more than I would worry about but would be a complete backup if needed.

I cannot comment on exactly how the DAP tune that works other than we have seen issues with it and how he is trying to disable the system. We have had customers remove the DAP tune and buy our kits. This is just guessing on my part about how it is done on other vehicles but the codes are simply removed from the lookup table so it can't set the CEL but the codes are still going to be there if scanned. We don't mess with the ECMs because that is getting into a whole different can of worms. With the GenII kit the system will still appear to be completely operational and the emissions monitor will even show that it is complete.
It is also EXTREMELY unlikely the GenII kit will fail a visual inspection by itself. More likely you will fail if they lift the skirt on your truck and don't see the catalytic converters or they notice your long tubes and don't have a CARB number for them. They cannot tell by hooking the computer up and looking at the emissions monitors or a tailpipe sniffer for the secondary air injection system. You would literally have to hook up a techstream type computer and force the system to run and use a sniffer at the same time.

Having said all that I have to stress that it is illegal to bypass or otherwise make inoperable an emissions system required to be on a vehicle and that our products are sold solely for off-road use or emissions excempt use only.

 

Also, if anyone has any questions directly please make sure to tag me in the post. You can also just give us a call or shoot us an email directly for a faster response. Support@hewitt-tech.com Toll Free 844-307-7671

 

Did this one myself too, cost me a total of around 15 bucks and an hour’s time.

 

Plug and Play you pay....I like $15. The level of experience is like hooking up a couple speakers.

 

@hewitttech

Can I just dike these wire bundles??

 

So that sheds of 100 lbs of weight. Will do this myself. Personally I would just tuck the wires away.

 

Yeah I ended up disconnecting. Couldnt bring myself to cut wires LOL I'll have to seal the engine side air tubes and the connector ends

That system was always at risk of my tire stuffing up into it and smashing it

 

Wonder if these smog pumps would work - they were used in the Ford 4.6 32V DOHC engines:
https://www.rockauto.com/en/catalog...88097,exhaust+&+emission,air+/+smog+pump,4920

Probably around in pick/pulls , only $120 or so new. System looks very similar (I'm a big ford guy).

 

got my bypass kit yesterday. Thanks for the fast shipping! @hewitttech

 

Hello all,

First post here. I’m picking up my 2012 4.6l tundra from the dealer today. It went in for secondary AIP bank 2 stuck open. I am the original owner and the truck has 60k on it. I’m a loyal customer of Toyota and have purchased several vehicles through this particular dealer in Haverhill Ma. After a couple weeks of back and forth they agreed to cover the cost of $600 “in good faith” for the stuck open valve. It seems on the 5.7l 2012’s are actually covered, I was able to persuade them to pick up the tab for a loyal customer. I’m happy about that, but going forward would anyone recommend for it against installing the Gen ll Hewitt bypass?
It seems to me I’ll be seeing this problem again down the road if I don’t bypass it, but I’m not over the moon about installing the exhaust block of plates with the bypass. I’m a handy person and used to do all my own maintenance. I’m not concerned about the work, just modifying my truck. Another concern is purchasing the bypass and having to remove it for my annual state emissions test. I’m just looking for some insight, and I have already read this entire thread. Thanks in advance. Ryan

 

exhaust plate looks easy to install. And I dont see any reason why you would have to remove it for emissions. They wont know its there

 

I think to clearify, I’m looking for thoughts and opinions on the likelihood of my pumps failing. Bank 2 valve failed and was replaced. I can replace bank 1 preemptively myself for less than $200, but if the pumps are going to fail than why bother? A Gen II bypass kit will cost me $400. I’m feeling like I don’t want to alter my truck with the bypass, but I also don’t want to deal with failed pumps. Is there a downside to the bypass?

 

@hewitttech just ordered my kit...

easy plug and play and removes a system that can leave you stranded... with almost 200k on my 07 i was getting worried about it, this was the easiest 400$ ive spent!

following @osidepunker on this, its super easy, and removes a bunch of crap i dont need!

 

Seems like a no brainer, there has to be a downside somewhere.

 

400$ is the only downside... that i can see. and the potential if you have to deal with smog... but i have my truck registered where its smog exempt. Sooo really only 400$ is the downside

 

I’ve heard it won’t affect emissions testing. I’d be curious to hear from someone in Massachusetts where I live. We have fairly strict emissions testing, I can imagine failing a computer precheck for illegal equipment.

 

only a visual inspection if they look for AIP and know where they are on our specific platform. Which i doubt... but a computer check will show nothing thats the key with the kit, it spoofs the AIP's so the ECU doesnt know the AIP's are missing.

 

I’m going to order one and give it a shot. The thought of dumping money into a useless
System in the future bothers me. I’d rather take a shot with the bypass.

 

Why does there have to be a downside???

Well, the downside is the price. But I feel its a fair price for what you get

 

There doesn’t have to be a downside I guess. I just haven’t modified this truck one bit since new. I want to know for sure what I’m getting into first, that’s all.

 

Well removing the pumps was 4 bolts and two connectors. But you dont have to actually pull them off the truck if you dont want to.

The kit itself looks easy. Block off plates are two bolts each. the wire harness is just a few connectors.

I'll report after its installed but I dont expect any issues.

 

I have a 07 with the 4.7 at 136K and the system have been worked on 2 or 3 times already by the PO's. I'm watching this thread to get an idea what to do when the time comes up again.

 

What is the likelihood of the AIP system failing, after years of non-use, if this unit is removed? Say if I got to sell the car and the new owner doesn’t want it; or, for whatever reason it may need to be removed.

 

How is anyone going to be able to answer this question???

 

I’d say someone familiar with the system would be able to give their opinion fairly easily. What causes the system to fail? Ingestion of water? I would say that if that is the cause, it’s more likely the system will work again down the road. Is it likely non-use would cause whatever valves are in play to seize? I’m not familiar with this system so even more unsure if it can be answered.

 

try googling "toyota tundra aip failure"

 

I live in MA and have had the bypass on my 07 ,5.7L for about 16 months, passed inspection no problem