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Old 09-28-2014, 05:12 AM   #1
salmanghiyas
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Stock (factory) yaris Timing ?

Hello,

Kindly share your views on what is the stock (factory) engine timing of Yaris 1.5L 1NZFE ...

does it vary year to year model ?

I am quoting Mr. Tooter ( my inspiration ) here ... as the mods he did to his 2014 yaris were

1: SRI Intake
2: 1zz TB
3: 1zz tooter's IM
4: weapon R headers

I have read all his threads and posts thoroughly ... and he never talked about Re-tuning ECU .. for AFR or Timing ...

which clearly means ... all these mods does not effect the AFR or timing ...

my tuner here ... is challenging me that with these mods .. u will must have to re-tune ur car because ur AFR wont be fine ...and further more u will not get gains ... until u set the engine timing as well ..


I'm confused here ... please help
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Old 09-28-2014, 06:43 AM   #2
IllusionX
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I believe the ECU is self learning. But there is a limit what it can do.

Our ECU are not programmable, so you need standalone or a piggyback to change those values...
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Old 09-28-2014, 09:42 AM   #3
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I don't think you really have a question. But if you did, the answer would be that the computer uses all of its sensors to change the mixture and timing within an acceptable range. The exact same way it does when it changes temperature outside, a low or high pressure system passes or when you change altitude.

Why do you think every car on the go today has o2 sensors, knock sensors, temperature sensors, pressure sensors, etc. They ALL input variables that the computer then uses to decide how much fuel to use and when to fire the coils.

You get the MOST gains with a re-tune because we are driving econo-box's and they are meant to last forever and get great fuel economy but a re-tune doesn't really become necessary until you do major mods like up the compression ratio or add in forced induction as those parameters obviously are something that our computer would never expect to see and it wouldn't be able to respond accordingly.


There is so so so so so so so so much more to it than that but hopefully you get the idea.
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Old 09-28-2014, 11:43 AM   #4
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Thanks for the replies ...

so basically .. my tuner is turning out to be wrong in this case ...

what i am getting from you guys is ... there is no need of ECU re-mapping or re-tuning or getting a piggy pack or any other engine management system ... if we do these mods ...

as our computer is that much efficient that it will automatically adjust AFR and timing and other values according to the mods we will do ... all these mods will only change the AFR n timing a lil bit that our ecu will easily adjust to it ...

right ?
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Old 09-28-2014, 11:51 AM   #5
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^ Correct.
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Old 09-28-2014, 12:06 PM   #6
salmanghiyas
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in fact ... i've already started the project ... wish me luck

1: custom made exhaust headers ...
2: custom made 2.25" down piping ...
3: TOPSPEED exhaust muffler 2.5" inlet and 4" outlet ...
4: custom made resonator in the mid ... exact copy of the OEM resonator ...
5: Lightened Flywheel ... before it was 5.8KG and now its 4.8KG ...
6: 1zz TB
7: 1zz aluminum IM .. just the same as Tooter's ...
8: custom made SRI tube 3" diameter
9: and last but not the least K&N big cone ... 10" long


some pics are attached ... more to come ...

I would again say .. that my inspiration is Tooter ... thanks to him as well .. as when ever i asked help from him, he was there ...
Attached Images
File Type: jpg IMG-20140924-WA002.jpg (118.5 KB, 192 views)
File Type: jpg IMG-20140924-WA004.jpg (136.5 KB, 192 views)
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Old 09-28-2014, 12:18 PM   #7
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Quote:
Originally Posted by salmanghiyas View Post
8: custom made SRI tube 3" diameter
Tell us more about what you are doing here. You must ensure that the intake tube reduces to OE diameter at the MAF, or you will throw codes. The ECU cannot compensate for that much increased airflow.
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Old 09-28-2014, 12:26 PM   #8
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Quote:
Originally Posted by WeeYari View Post
Tell us more about what you are doing here. You must ensure that the intake tube reduces to OE diameter at the MAF, or you will throw codes. The ECU cannot compensate for that much increased airflow.
ahaan ... thank god my fabricator hasn't started working on it

so i'll take deep measurements of the OEM intake tube and then will ask him to make the same SRI with exact same dimensions and dia ....
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Old 09-28-2014, 12:30 PM   #9
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by the way ... were u trying to correct me for my intake tube diameter .... or were u directing me to put the MAF sensor to correct position as the OEM one into my new tube ...
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Old 09-28-2014, 11:45 PM   #10
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The diameter of the intake tube can NOT deviate from the stock diameter. MAF placement is not as critical, but if you change the tube diameter, you affect the air velocity passing by the MAF and will screw up it's calibration.
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Old 09-29-2014, 01:25 AM   #11
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Quote:
Originally Posted by salmanghiyas View Post
Hello,

Kindly share your views on what is the stock (factory) engine timing of Yaris 1.5L 1NZFE ...

does it vary year to year model ?

I am quoting Mr. Tooter ( my inspiration ) here ... as the mods he did to his 2014 yaris were

1: SRI Intake
2: 1zz TB
3: 1zz tooter's IM
4: weapon R headers

I have read all his threads and posts thoroughly ... and he never talked about Re-tuning ECU .. for AFR or Timing ...

which clearly means ... all these mods does not effect the AFR or timing ...
That's correct... On my car those mods need no tuning, don't throw any codes, and the engine runs just fine on cheap 87 octane pump gas.

Before you install the 1ZZ throttle body, carefully break free the epoxy, and turn the tiny factory preset idle screw counter clockwise one turn to slow down the idle speed. It's preset for a 1.8 which will be way too high for the smaller 1.5. If you don't do this, the ECU will go crazy trying to find the right idle speed with the wrong butterfly setting and it will not be safe to drive as the engine alternately race and then stall as you're slowing to a stop.

MAF sensor: The most simple and easy way is to install your MAF sensor on an aftermarket intake. Then you don't need to guess as to what might, or might not work.

I just used an old Simota intake tube because the engine facing end flares out to match the diameter of the larger 1ZZ throttle body. I chopped it really short to make room for an oversized dry air filter.

It works perfectly and doesn't throw any codes.

Greg
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Old 10-03-2014, 04:09 PM   #12
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thx for the replies guys ...

btw .. my core question remained unanswered .. what is the stock timing of Yaris ?
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Old 10-03-2014, 04:11 PM   #13
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I don't know exactly but I've heard it's very conservative and that there's a lot left on the table.


Sent from my iPod Touch
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Old 10-03-2014, 04:14 PM   #14
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Quote:
Originally Posted by salmanghiyas View Post
thx for the replies guys ...

btw .. my core question remained unanswered .. what is the stock timing of Yaris ?
As mentioned above, it is highly variable, as the ECM controls it itself. The base timing is 0 to 14 degrees BTDC at idle.
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Old 10-03-2014, 04:24 PM   #15
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ahan .. well ..

let me also add some info to the thread ...

and maybe .. some of you might jump out of your couches after reading this ...

The Cost !!!

1zz aluminum IM .. for $25
aftermarket exhaust headers ... for $80
custom down piping ... for $40
custom made resonator just the same as stock OEM ... for $30
TOPSPEED exhaust muffler brand new ... for $35
1zz TB ......... for $45
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Old 10-05-2014, 03:41 AM   #16
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Finally ... Im done with the installation. Of IM as well ... Thank GOD there are no CELs .. but ... In 2nd , 3rd and 4th gear ... In low rpms .. like below 3000 ... Engine is knocking ... For a bit or so ... But it knocks ...

Help
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Old 10-05-2014, 01:45 PM   #17
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perform a deceleration sensor zero point calibration and test again

and the base timing is 10 +/-2 BTDC @ 650 RPMs for the 1NZ-FE and no, you cannot change it using the stock ECU

Last edited by woops; 10-07-2014 at 05:08 AM.
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Old 10-19-2014, 04:54 PM   #18
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Guys ...

Need help ... Im continously getting EGR exhaust gas recirculation CEL ...

Which eventually unstablise my throttle and rpm ...causes a very lil vibration ... And as far as I feel ... Reduce in performance
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