Second Gen Tundra AIP Failure Club

[aknightinak]

I'm about to go pull the codes, but...you know...it's gotta be: it Christmas trees the dash lights, chucks itself into limp mode, allows itself to be erased a while, seems to have some bearing on the temperature out when it decides to do it. Naturally, I picked up the truck 3 years out of the extended warranty, if still 25k miles within it.

I found the videos through tundras.com and wherever else, priced things through the dealer. Currently I'm looking at the weather forecast, my schedule, and lack of garage, weighing how much that $900some in labor is worth.

My question is on the improved intake horn/splashguard: is that really working out to be adequate, or has someone figured out a snorkel or extended breather for it for additional peace of mind?

Edited to add: I've looked at the bypass kits and feedback and ruled them out. I've never considered a workaround to be a fix.

 

[frogers930]

@aknightinak Curious as to what conclusion you came too in regards to the bypass kit and why you ruled them out?

I have a 2008 and while running a health check via Techstream came across pending codes for the AIP. I shared this info on Tundras & Mud to see if anyone had seem similar and then had a failure but didn't get any response. I cleared the codes and they haven't come back up, Techstream shows no issue right now. I did buy the Hewitt bypass kit as a backup as I am getting ready for a road trip.

Here are the Techstream readings. Codes were P2445 & P2447

 

[aknightinak]

A few reasons, perhaps mainly because I feel more confident about my ability to get in and out of the top end than I do about parting the exhaust to fit the block-off plates without bending something. I'm a terminal amateur in certain regards and not a big guy; most of the time if something requires force I struggle to find that sweet spot between not enough and too much.

Reviews I read of the bypass were also generally, probably even overall, positive but also a little all over the board with regard to reliability and the presentation of subsequent exhaust leaks (see above).

There's also the notion of wanting to keep the proper parts in there in the event I don't keep the truck (something I'm starting to consider). There's no IM here, but having sold modified stuff before, I find it takes a particular buyer, even if what's been done is an improvement. And, I'm a full disclosure kind of guy. I wouldn't do something like that and then play dumb about it (something I suspect the seller might have done --- "cleared the codes; nope, nothing wrong!").

That said, I'm still on the fence about shelling out $1800 in parts, and the weather this weekend isn't looking too conducive to working in the "open-air garage," so I can probably hem and haw some more.

The tabletop passenger seatback makes a great place to keep the 10mm's from rolling away. Now, if the rain would just finish blowing out of here, I can get started. Glad I set the jack and stand set on plywood last night before everything turned to mush.

The service tech who spec'd me the parts list mentioned he had a couple customers that ran the bypass without complaint but kind of shrugged at it, too. The speed at which he dragged up the parts list and at which parts had the stuff pulled, suggested they see more replacements than bypasses.
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Took about 10 hours over 2 days with help. A short 10mm box end is key. There was silt everywhere, so a lot else wanted cleaning. Glad, too, to have finally ditched the K&N. Everything sounds happy so far.

 

[frogers930]

@aknightinak Thanks for feedback. I received my bypass kit but hopefully won't need to use it, pending codes have not returned.

Glad you got yours sorted out. Besides new parts are you taking any other precautions to keep the issue from returning? I have read about water/moisture being part of the issue.

 

[aknightinak]

No worries. Glad you checked back. I didn't see reason to keep stacking replies.

Right now, all I did was clean and grease all the electrical connections on the way out, put some rescue tape on some minor cracking at the ends of the vac hoses under the fender. Mindfulness is going to be the best precaution. I feel pretty okay about the guard they added in terms of splash and spray. As long as I keep the fender liner in place, there shouldn't be any freezing spray issues in winter, either. As far as immersion, I cant say. Again, as long as I can keep the liner in place, it should be alright. Most fords I envision, if they are deep enough, aren't wide enough to have time to infiltrate that air pocket, and ostensibly this guard should train any runoff the right way. Plus, it's not inhaling all the time like the airbox, just at startup. I think if I felt I did sink it well enough to worry, I'd just be prompt about pulling the unit out of the fender to dry and clean it.

I'd like to put a snorkel on the truck, itself, and I was looking at how to to route the feed horn for the fenderwell assembly into the linkage I'd need for that come that day, because it's all right there within inches of one another. My other idea was to run a breather of some kind, but the terminus of the intake is an inch or better, and the two tubes are molded together. In both cases, the old design feed would be easier to customize, and naturally, it went out with the dumpster this morning. But I was so done with those things once they were out, I didn't want to look at them again.