NCP91 RS VVTI solenoid and MAF sensor upgrade for NCP90 - Toyota Yaris Forums

Compeer · 11-20-2022, 10:40 PM

Was reading the "all motor yaris" post and read about the different vvti solenoid valves and maf sensors. The standard 1nzfe Solenoid valve turns vvti on at 4000rpm but the RS solenoid turns it on at 2500rpm (The thread said it was confirmed by tuner on the dyno)

So being in nz I whipped out to the wreckers and took one off a 2009 90k km crashed RS. $120 nzd later and these little mods are adding up!

New bits.

Old vvti solenoid valve top versus RS bottom with extra hole.

[IMG]https://cdn.discordapp.com/attachments/780579349693726720/1044102621486657546/IMG_22621.JPG?ex=65486757&is=6535f257&hm=da7beef5b 80e339681521ab1e6eda15e1b56942f72e0246467132434f05 0a406&
Turns out I already had the "C" labeled maf sensor but the new one looked cleaner so that got installed too. Car should be happy as after the ecu reset. Will test it over the next few days to see if i notice the vvti kicking in earlier.

Another day another mod! I think im kinda addicted to looking for yaris parts at this point.

11-20-2022, 10:40 PM	#1
Compeer Drives: NCP90 TRD Yaris Manual Join Date: Oct 2022 Location: Auckland, NZ Posts: 266	NCP91 RS VVTI solenoid and MAF sensor upgrade for NCP90 Was reading the "all motor yaris" post and read about the different vvti solenoid valves and maf sensors. The standard 1nzfe Solenoid valve turns vvti on at 4000rpm but the RS solenoid turns it on at 2500rpm (The thread said it was confirmed by tuner on the dyno) So being in nz I whipped out to the wreckers and took one off a 2009 90k km crashed RS. $120 nzd later and these little mods are adding up! New bits. Old vvti solenoid valve top versus RS bottom with extra hole. [IMG]https://cdn.discordapp.com/attachments/780579349693726720/1044102621486657546/IMG_22621.JPG?ex=65486757&is=6535f257&hm=da7beef5b 80e339681521ab1e6eda15e1b56942f72e0246467132434f05 0a406& Turns out I already had the "C" labeled maf sensor but the new one looked cleaner so that got installed too. Car should be happy as after the ecu reset. Will test it over the next few days to see if i notice the vvti kicking in earlier. Another day another mod! I think im kinda addicted to looking for yaris parts at this point. Last edited by Compeer; 10-28-2023 at 12:51 PM.