NCP91 RS VVTI solenoid and MAF sensor upgrade for NCP90

[NYC-SE]

Wouldn't this solenoid be controlled by the ECU? How would the ECU know that a different solenoid was installed? Wouldn't it just energize this solenoid at 4000 rpm just like the other one? What am I not understanding?

[WeeYari]

Originally Posted by NYC-SE

What am I not understanding?

I'm with you.


Also, as far as I know, in the Canadian and US markets, the RS or S models did not get anything different over the lower trim levels.

[sh0rtlife]

Originally Posted by NYC-SE

Wouldn't this solenoid be controlled by the ECU? How would the ECU know that a different solenoid was installed? Wouldn't it just energize this solenoid at 4000 rpm just like the other one? What am I not understanding?

im wondering this also, but i also wonder if it gives some "feedback" to the ecu, or if the channels in it are cut differently enough to make a big change...thats why i went hunting for any referance to it i could find thru toyota

[sh0rtlife]

Originally Posted by NYC-SE

Wouldn't this solenoid be controlled by the ECU? How would the ECU know that a different solenoid was installed? Wouldn't it just energize this solenoid at 4000 rpm just like the other one? What am I not understanding?

im wondering this also, but i also wonder if it gives some "feedback" via resistance to the ecu, or if the channels in it are cut differently enough to make a big change...thats why i went hunting for any referance to it i could find thru toyota

i have turned this up tho

"yaris" stock US(verifyed) part numbers
1533021011
15330-21011
1533021010
1533021020

"echo" numbers
15330-23010

"euro" yaris
15330-40020

now these number were all pulled from ebay...so...i dont know how acurate any of it is...but it raises a big question...
why are there 3 different units for the same engine
a "revision" from the gen1 to gen 2 makes sense..so lets write that one off...but why is the "euro" and "US" spec parts 2 different numbers for the same year range?

i still cant verify finding a RS part number tho

[Compeer]

Got the numbers for you and its 15330-21020 for the solenoid, so appears some of your USA motors got this one. ( I just researched and USA were sold the RS yaris, which came with this solenoid, thats why you have it listed in usdm)

maf sensor number is "c" 22204-22010

No idea about this brand, but they are cheap! https://www.aliexpress.com/i/1005001388213512.html

It has ALL the RS chassis numbers listed but not the the standard chassis like ncp90. The sellers seem to sell any of the numbers as "matching" so becareful if you order to make suire it is the RS designed one.

And just looking at it, its going to have a LOT more oil flow to the vvti assembly, I just looked up that stock european one and and it only has two small slots, so way less oil flow.

Considering the vvti assembly is a known failure point for the engines I think I like the idea of more oil flow, as for performance is does feel like vvti is coming on sooner.

[Compeer]

Originally Posted by NYC-SE

Wouldn't this solenoid be controlled by the ECU? How would the ECU know that a different solenoid was installed? Wouldn't it just energize this solenoid at 4000 rpm just like the other one? What am I not understanding?

You will have to learn Thai and join their forums all I was going off the e85 all motor post from this forum where they have dyno tuned a 1nzfe with a few mods. https://yarisworld.com/forums/showthread.php?t=55835

But I just looked up other toyota "performance" engine variants and they have the same design for example here is the 2zz-ge's unit. It also has the step down and the extra outlet holes.

[Neinris]

That's interesting...

Found one in Amazon:

https://www.amazon.com/Variable-1533...87546138&psc=1

[Compeer]

Originally Posted by Neinris

That's interesting...

Found one in Amazon:

https://www.amazon.com/Variable-1533...87546138&psc=1

Notice tho it doesnt have the correct amount of holes or the stepped down parts that the real RS one has.

[Neinris]

Originally Posted by Compeer

Notice tho it doesnt have the correct amount of holes or the stepped down parts that the real RS one has.

I counted 6 on one side and 3 on the other. What's the real RS's count?

[Compeer]

Originally Posted by Neinris

I counted 6 on one side and 3 on the other. What's the real RS's count?

6 holes as well plus holes in the tip. the holes tho are a bit larger and different towards the end, plus mine had that like 0.5mm step down, but the one the e85 all motor post guy used look like that aftermarket version you posted and they said it worked mint.

ALSO got to wonder what the clocking on the side is for!???? OEM RS doesnt have that, its just set where its at.