I think it's great that you lowered the price of the old style units.
this 140 $ solution is good for all these LC and LX 4.7 people.
and for the full delete.
I got a not found on clicking the instructions for gen 2 for tundra and just a page refresh when you click on landcruiser.
look at the 4.6 tundra sequoia gen II instructions.
The configuration is a bit different on the older 4.7L vehicles and is a 3 valve system. The 4.7L vehicles that have this configuration are 05-06 Tundra, 05-07 Sequoia, ALL GX470, LX470, and LC(470) and 4R. It is a slightly more complicated system than say the current configuration that is used on say the 4.6L.
Because the 3 valve vehicles have the system completely under the intake manifold the Gen-II kits for them are not completely plug and play. Without pullin gthe intake manifold there is no way to easily connect to the pressure sensor (circled in red) other than to make the three wire connections at the ECM. The connections are simple and while I do not have the complete installation instructions finished yet it does come with instructions for the wired connection.
In fact this is the only reason the Gen-II units for the 3 valve system show as Pre-order but we have sold at least 20-30 already and we can easily walk through the installation with you until those are finished (hopefully this week).
can you verify that we can/could remove everything in red?
also I'm not seeing, or understanding the pressure sensor option as it relates to the 4.7. DO we not need one, or do we. Or do we need two?
You can remove everything secondary air related with the exception of the pressure sensor (circled in red) when using the Gen-II kits, not the older Gen-I style kits. You also would typically just leave everything in place since you have to remove the manifold to remove any part of the system. The 3 valve system only has one pressure sensors. The vehicle still uses this sensor regardless of the bypass kits. You only need one good one and it is fairly rare for a pressure sensor in a 3 valve system to get damaged. The options for dealing with a damaged sensor on the 3 valve system is to pull the intake manifold and replace the sensor directly or just do it at the ECM by cutting the one sensor voltage wire loose from the old sensor and adding a new sensor with a pigtail directly at the ECM.
I'd like to remove both number 2 air switching valves, both their downpipes to the exhaust manifold, The two vacuum switching valves on the passenger side fuel rail, the air pump assembly and mount, and the main air switching valve right next to it under the intake.
All of those things can be removed with the Gen-II kit again with the exception of the pressure sensor that is mounted on the main air switching valve.
The Gen-II replaces the factory air injection control driver, will plug into the factory harness in place of the VSV on the top passenger side of the intake and will wire into the pressure sensor at the ECM. Nothing else is needed. To do all this with the Gen-I kits you would need to add a pump proxy pack, a valve proxy pack and you would have to leave the VSVs and the air injection control driver in place.
The pressure sensor on the main air switching valve, I assume that's the one that has to stay somewhere connected to one of your harness connectors? maybe moved out to the drivers side fuel rail?
Again most people are just going to leave everything where it is because they are not pulling the intake manifold. You would just leave it in place connected to the factory harness. If you are getting rid of everything I would consider relocating the pressure sensor or PSO-wired and tie it in at the ECM under the dash. This is where the Gen-II taps into the pressure sensor circuit anyways. If you have the intake off you could wire the Gen-II 3 wires directly into the sensor instead of going all the way to the ECM but we do not really support this, any issues with the wire connections you would have to pull the intake again to get to it.
Is the 400$ option whats needed to accomplish this? or would one or two pressure sensor replacements be needed @ 200$ each.
I'd only think one, if someone's was damaged where it's connected to the main air switching valve?
The Gen-II is the $400 option that you would need to be a "delete" kit. You do not need the pressure sensors unless the one you have is damaged which is rare on this system configuration other than rodent wire damage. We wire a pigtail into the ECM and cut the old one loose there if they are damaged vs pulling the intake and replacing it directly.
there aren't pressure sensors in the vacuum switching valves, are there?
There are no pressure sensors in the N0.2 Air switching valves at the back of the engine, they are vacuum actuated by the VSV on the top passenger side of the intake manifold.
thanks for the hard work and info.
I totally understand if you just say,
wait, we're not finished yet. I know this isn't easy stuff to deal with.
The Gen-II 3Valve kits are completely finished, just not the install instructions yet. We already have about 20-30 of them out in the wild and running free!
If anyone has any other quesitons please give us a call Toll Free 1-844-307-7671 or email us direct Support@hewitt-tech.com
8942171010 toyota map sensor, pressure sensor on main switching valve
Just a note about these sensors, just like other Toyota sensors, DO NOT use a $20-40 dollar sensor from ebay or amazon thinking they are the same and you are saving some money. There are tons of cheap knockoffs and counterfeits available. We use only genuine sensors in our pressure sensor products and import them from Toyota of Japan and pass what we can for savings along. We have never had a bad sensor.
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