Thanks very much. Glad it helped out :)

haha! really had me doubting myself. regular speed was fine in order for me to really watch and absorb the details. saved a screenshot of the drawing. 😊

@@notchbak haha Thanks man!

You got that right haha. Mine was super dirty when I took it off to clean it also :-)

The 22RE EGR system is controlled with an electrical VSV that is operated by the ECU as well as manifold vacuum.

@@ray5961 i have another question i saw on another video you put. I noticed where you have two coolant temperature sensors there is like a plug on top. I seen on some other 22re there is like a valve that threads there and connect two vacuum lines. Is it supposed to have one? At the website 22re performance they call it a egr bi metal vacuum switching valve.

@@barca_m1041 hmm, not sure. Do you have a video showing what you're referring to? Or maybe a link to an image or something?

I'm not a mechanic. I'm just a guy like you with a truck. Try going on Yelp and search around perhaps? I found a good mechanic out in Texas for my ex-girlfriend's sisters 4Runner and he is an old japanese guy who really knows his business. But yeah, finding a good mechanic who knows about the older vehicles isn't easy. Have you jumped the diagnostic port on your truck and pulled the code yet? That might point you in the right direction. Also, you an buy the 2 volume shop manual set on ebay used. Most of my knowledge about the 22RE just came from general automotive experience and reading the shop manual.

Sorry can't help too much there, as I do not have any first hand experience with the 22R - only the 22RE. Let me know if you have any more specific questions.

I believe the better gas mileage claim has mostly to do with the fact that the exhaust fumes are largely inert in nature, therefore they displace some amount of air/fuel mixture that would otherwise be burnt. My understanding is that it also helps reduce cylinder temps a bit (since there is less combustion mixture taking place). How well it all works or how much it improves gas mileage is anyone's guess.

Not totally sure what you mean there, but as far as emissions go with relation to the atmosphere, the goal is to break harmful compounds into less toxic compounds as they travel through the catalytic convert basically; the extreme heat inside the cat breaks down the bonds and makes what exits the tail pipe less deadly.

The systems work exactly as I have explained them on this video and anyone who has ever actually rebuilt each of them and made sure they are functioning correctly on a 22RE motor should understand that. What exactly do you feel I have not explained here?

@@ray5961 well 1st what role does the vsv for the egr actually do? It is t in to the egr signal line but you don't explain it. All you really say is a general overview of each part of the egr system not under what conditions the system functions. the vaccume lines that connect to the throttle body only have vaccume under certain throttle openings to control egr functions at different engine conditions. You explanation is not bad just a little simplistic. If I sound like a dick or something I'm sorry. Thanks for the video it did help me.

@@rodneycassidy6037 Hi Rodney - yeah, I understand where you are coming from. With regard to the VSV's, those are mainly just on/off switches, which either allow or block vacuum flow from the motor; this serves to either activate a system or not. So, for example, as you asked there with the EGR VSV: it's allowing the ECU of the truck to decide if the motor is in a state were it's okay to start introducing the re-burning of some exhaust gases. I believe I sort of touched upon that in one brief section of the video (where I was talking bout how this actually has a beneficial cooling effect, etc.), but I might not have spent as much time discussing it as I should have. The other interesting thing with regard to the EGR system is that there is a modulation device involved as well, which not only takes into account vacuum from the motor, but also pressure in the exhaust system as well. So there is definitely a lot going on and that's not an area I covered 100%. My main goal was to sort of just provide an overview, so people who were confused might have a starting point in order to better understand what some of the mess of hoses on their 22RE are for. And you are correct, all these vacuum hoses in large part are governed by the state of the throttle position and also engine load. So, in certain situations, there is little to no vacuum present - and as such, they are having little to no impact on anything. A good example of that is the fuel pressure VSV. On my motor specifically, I actually removed that VSV completely and I just allow the ranging engine vacuum to dictate whether or not the fuel pressure regulator (which is vacuum powered) alters the fuel pressure or not. It might not be quite as accurate as having the VSV also in the mix, but I feel it's close enough to function as the motor needs, but not cause any issues due to the VSV not being present. If you watch some of my other videos, you might notice I have an AEM fuel pressure gauge connected off the back of the fuel rail, in order to monitor fuel pressure on the rail. So on my truck, when I give it gas and vacuum is affected, then the fuel pressure is increased, even without the ECU and VSV having to open up the line or not (since the line is always connected on my motor). One of the reasons I sort of skimmed over some of what you are referring to is because a lot of those areas are controlled by how Toyota wrote the software inside the ECU. Without installing a piggy back ECU or a full dedicated ECU, there is really no means to alter how some of the VSV systems are controlled. Because of this, I tried to mainly focus on "what the systems do" in broad terms, in an effort to help people at least have some idea of what all the hoses on their motors do and what Toyota was trying to accomplish with some of these different systems for smog, etc. Anyway, thanks for pointing that out and I'm glad the video helped, even thought you're right, it's a fairly basic run down of a rather complex and interesting system that controls the motor's functioning under a lot of different load conditions.

Would a bad VSV be a reason for no start? I checked vacuum (EGR modulator > through VSV > EGR valve) I unhooked both the vacuum house from the modulator and valve. Checked vacuum going through the modulator towards the VSV; It holds vacuum. I was under the assumption that this should not hold vacuum when the truck is cold? Am I wrong?

@@shawnkuffner no. do you have spark and fuel? a vsv doesn't control anything on a 22r or re fuel or spark system.