1ZZ throttle body - Toyota Yaris Forums

aucorium · 10-07-2009, 02:56 PM

hey guys

please explain how the throttle body works better on the yaris ? does it give better power ? if so , i wanna try fitting it to my 1300cc 2NZFE , as so far , all the 1500cc aftermarket parts work on mine. has anybody got good experience in changing it and what differences they have felt ?

ozmdd · 10-07-2009, 03:00 PM

The idea of a larger TB is that it allows greater airflow volume into the intake manifold. This should increase HP slightly. You'll need someone who knows more to tell you what part of the powerband it affects most, though I hear reports of people's butt dyno thelling them the midrange is better.

thebarber · 10-07-2009, 03:16 PM

are you dbw? i have an extra 1zz throttle body if you wanna buy it...

hatchbackkid82 · 10-07-2009, 03:29 PM

This mod is good if you can get it to work, i think there are only a hand full of people that have done this sucessfully. I had it on my car, it did help the mid range, but it started throwing CEL's and started oscillating. I had to take it off. If you get it to work great, i just wouldn't mess with it though. Too much trouble for one mod

jt258 · 10-07-2009, 03:46 PM

mine oscillated until i did the throttle body bypass that stopped immediately.did the 1nz chip swap. my stopped throwing cel after 3wks.

*tk-421* · 10-07-2009, 03:49 PM

In my case it has been a pretty cool mod to DIY. The only real PITA was getting the hose to fit. I swapped the chip and bypassed the coolant line. I've never had any CELs and it's been running strong for at least 5000kms. I do get a high idle (~2.5K) for the first couple of minutes and some oscillation (~500 RPMs) when warm.

The car feels more responsive and it is most noticeable in the mid to high range.

thebarber · 10-07-2009, 04:00 PM

Quote:

Originally Posted by tk-421

The only real PITA was getting the hose to fit

you can rotate the inlet connections on the tb to match the angle of the 1nzfe throttle body

Gideon · 10-07-2009, 06:37 PM

The Yaris throttle only opens to 80% at WOT IIRC, so anything of a larger diameter will be limited as well, although you're increasing the amount of air to the engine regardless.

My 1ZZ TB has been on for over 5,000 miles with no issues. No chip swap, I just let the ECU do it's thang. No CEL either, although I had one initially so it might have gotten tired of displaying it on the cluster.

I have a high idle like tk when cold, (2.5K) but it goes away when the engine warms up.

frownonfun · 10-07-2009, 07:30 PM

Quote:

Originally Posted by thebarber

are you dbw? i have an extra 1zz throttle body if you wanna buy it...

i think i've asked you this before but how much?

PHXDEMON · 10-07-2009, 10:27 PM

I had a hell of a time with the mod. Loved the extra power/response but after 2 weeks of messing with it and having horrible issues with oscillation and CEL's having to get my car towed 25 miles after my engine suddenly died and then refused to idle after work I gave up and threw the stock throttle body on.

Kioshi · 10-08-2009, 12:37 AM

This is one mod, even though I'll get help from my mechanics on this, still am afraid to mess with. I need my car practically everyday due to school and work.

I'll avoid this till further down the road a easy slip on, slip off solution is worked into this 50/50 worry free modification.

aucorium · 10-08-2009, 04:43 AM

mmmm , thanks for all the info guys , gonna see how my car goes after i do the K&N typhoon intake , DC sports header , and the full de-cat and 2" exhaust.

anybody got any idea of aftermarket cams ??

thebarber · 10-08-2009, 08:18 AM

Quote:

Originally Posted by aucorium

mmmm , thanks for all the info guys , gonna see how my car goes after i do the K&N typhoon intake , DC sports header , and the full de-cat and 2" exhaust.

anybody got any idea of aftermarket cams ??

http://www.microimageonline.com/foru...stom-cams.html

hatchbackkid82 · 10-08-2009, 08:23 AM

Just leave the stock TB on, it's too much of a PITA for like 2-3 hp

JapRulezz · 10-08-2009, 10:02 AM

Quote:

Originally Posted by aucorium

mmmm , thanks for all the info guys , gonna see how my car goes after i do the K&N typhoon intake , DC sports header , and the full de-cat and 2" exhaust.

i own a 2NZ-FE and the K&N typhoon is nice , but i dont think it yields 4.5 HP like the 1.5 version... i think the exhaust will be a good mod with the intake
but i cant stand that loud noise on small speeds

YarisPR · 10-08-2009, 05:21 PM

Quote:

Originally Posted by hatchbackkid82

Just leave the stock TB on, it's too much of a PITA for like 2-3 hp

I wouldn't call 4 bolts and some coolant line a PITA....

Do it It won't take you more than 30min. for 2-3HP

hatchbackkid82 · 10-09-2009, 08:35 AM

You're right, it was a simple install, but the issues that come along with this mod aren't worth the mod itself IMO (Oscillation, CEL, No smooth transition into DFCO, and one members car just shut off if remember right) The install time is short, but trying to get it to play nice withthe ECU is another thing. Don't get me wrong thoug, If i could throw this TB on and not have any issues i would have kept it on, but i had the first 3 problems that i mentioned above. So it had to come off, i think there are only a handful of memebers that have done this sucessfully

Quote:

Originally Posted by YarisPR

I wouldn't call 4 bolts and some coolant line a PITA....

Do it It won't take you more than 30min. for 2-3HP

t0m4s · 10-09-2009, 07:36 PM

sorry but
what's PITA? DFCO? IIRC? and WOT?

10-07-2009, 02:56 PM	#1
aucorium AKA Samurai Racer Drives: Yaris 2006 Join Date: Jul 2006 Location: South Africa Posts: 834	1ZZ throttle body hey guys please explain how the throttle body works better on the yaris ? does it give better power ? if so , i wanna try fitting it to my 1300cc 2NZFE , as so far , all the 1500cc aftermarket parts work on mine. has anybody got good experience in changing it and what differences they have felt ? __________________ JDMtuner Import Performance Tuning www.jdmtuner.co.za

10-07-2009, 03:16 PM	#3
thebarber daily driver View User's Garage Drives: the #wrecho Join Date: Jun 2006 Location: Grand Rapids, MI Posts: 5,877	are you dbw? i have an extra 1zz throttle body if you wanna buy it... __________________

10-07-2009, 03:49 PM	#6
tk-421 Super Moderator View User's Garage Drives: 5D-07-LB Join Date: Jan 2007 Location: Dagobah Posts: 4,263	In my case it has been a pretty cool mod to DIY. The only real PITA was getting the hose to fit. I swapped the chip and bypassed the coolant line. I've never had any CELs and it's been running strong for at least 5000kms. I do get a high idle (~2.5K) for the first couple of minutes and some oscillation (~500 RPMs) when warm. The car feels more responsive and it is most noticeable in the mid to high range. __________________ --[ FORUM RULES ]--[ SEARCHING TIPS ]--[ EYELIDS PICS ]--[ RBK SPOILER ]--[ BEST/WORST INVESTMENTS ]--

10-08-2009, 04:43 AM	#12
aucorium AKA Samurai Racer Drives: Yaris 2006 Join Date: Jul 2006 Location: South Africa Posts: 834	mmmm , thanks for all the info guys , gonna see how my car goes after i do the K&N typhoon intake , DC sports header , and the full de-cat and 2" exhaust. anybody got any idea of aftermarket cams ?? __________________ JDMtuner Import Performance Tuning www.jdmtuner.co.za

10-09-2009, 07:36 PM	#18
t0m4s 1NZ-FE View User's Garage Drives: Yaris Seddan 08 Join Date: Oct 2008 Location: Panama Posts: 220	sorry but what's PITA? DFCO? IIRC? and WOT? __________________ . DC Sports Header, Vibrant Hi-Flow Cat, Round Magnaflow Muffler, Vibrant Tip, Dunlop Direzza 195/50 Rims 15", Injen Technologies Cold Air Intake, NST CR-Lite crank, waterpump & alternator pulleys, Tanabe NF210 Springs, NST SSK 1 & 2, NST Shifter Cable & Cage Bushing Kit, Nitto Engine Torque Damper

10-07-2009, 03:00 PM	#2
ozmdd Reluctantly Crouched... Drives: 2008 Yaris HB M/T Join Date: Oct 2008 Location: DFW, TX Posts: 867	The idea of a larger TB is that it allows greater airflow volume into the intake manifold. This should increase HP slightly. You'll need someone who knows more to tell you what part of the powerband it affects most, though I hear reports of people's butt dyno thelling them the midrange is better.

10-07-2009, 03:29 PM	#4
hatchbackkid82 Drives: . Join Date: Apr 2007 Location: . Posts: 1,828	This mod is good if you can get it to work, i think there are only a hand full of people that have done this sucessfully. I had it on my car, it did help the mid range, but it started throwing CEL's and started oscillating. I had to take it off. If you get it to work great, i just wouldn't mess with it though. Too much trouble for one mod

10-07-2009, 03:46 PM	#5
jt258 View User's Garage Drives: 10' corolla ce Join Date: Oct 2008 Location: HOUSTON Posts: 106	mine oscillated until i did the throttle body bypass that stopped immediately.did the 1nz chip swap. my stopped throwing cel after 3wks.

10-07-2009, 06:37 PM	#8
Gideon ★weeaboo★ View User's Garage Drives: 2008 Bayou LB Join Date: Oct 2008 Location: Sunnyvale, CA Posts: 661	The Yaris throttle only opens to 80% at WOT IIRC, so anything of a larger diameter will be limited as well, although you're increasing the amount of air to the engine regardless. My 1ZZ TB has been on for over 5,000 miles with no issues. No chip swap, I just let the ECU do it's thang. No CEL either, although I had one initially so it might have gotten tired of displaying it on the cluster. I have a high idle like tk when cold, (2.5K) but it goes away when the engine warms up.

10-07-2009, 10:27 PM	#10
PHXDEMON View User's Garage Drives: 2007 Red Liftback Join Date: Oct 2008 Location: Phoenix, AZ Posts: 885	I had a hell of a time with the mod. Loved the extra power/response but after 2 weeks of messing with it and having horrible issues with oscillation and CEL's having to get my car towed 25 miles after my engine suddenly died and then refused to idle after work I gave up and threw the stock throttle body on.

10-08-2009, 12:37 AM	#11
Kioshi Heart Up! Vitz Drives: トヨタ Vitz Join Date: Jun 2007 Location: Fremont, CA Posts: 2,582	This is one mod, even though I'll get help from my mechanics on this, still am afraid to mess with. I need my car practically everyday due to school and work. I'll avoid this till further down the road a easy slip on, slip off solution is worked into this 50/50 worry free modification.

10-08-2009, 08:23 AM	#14
hatchbackkid82 Drives: . Join Date: Apr 2007 Location: . Posts: 1,828	Just leave the stock TB on, it's too much of a PITA for like 2-3 hp

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