Stock (factory) yaris Timing ?

[salmanghiyas]

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

[IllusionX]

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...

[mitchell12]

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.

[salmanghiyas]

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 ?

[WeeYari]

^ Correct.

[salmanghiyas]

in fact ... i've already started the project ... wish me luck :headbang:

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 ...

[WeeYari]

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.

[salmanghiyas]

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 :biggrin:

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 ....

[salmanghiyas]

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 ...

[Bluevitz-rs]

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.

[tooter]

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. :smile:

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. http://i17.photobucket.com/albums/b90/compost_bin/car/04b0e155-5dc8-41c1-be03-33a36201ae8c_zps673de88f.jpg

It works perfectly and doesn't throw any codes. :smile:

Greg

[salmanghiyas]

thx for the replies guys ...

btw .. my core question remained unanswered .. what is the stock timing of Yaris ?

[Bluevitz-rs]

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

[CTScott]

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.

[salmanghiyas]

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 !!! :biggrin::biggrin::biggrin:

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

[salmanghiyas]

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

[woops]

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

[salmanghiyas]

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

[Bluevitz-rs]

That's pretty neat considering the 1NZ doesn't have EGR because of VVT-i


Sent from my iPod Touch

[salmanghiyas]

What ??

I didnt get u bro ...

[Bluevitz-rs]

Do you know what EGR is?


Sent from my iPod Touch

[salmanghiyas]

Exhaust gas recirculation ... Isnt it ?

And thats what the scan gauge was telling ... And im just confused abt ur saying EGR is not there ins vvt-i ??

[CTScott]

He actually does have EGR on his, as it is a Japanese Vitz.

What is the code that you are reading regarding the EGR?

There is an exhaust gas sensor (89412-35020), and the EGR Valve assembly (25620-21010) that are the typical failure components for the Vitz EGR.

[Bluevitz-rs]

I apologize then. When I read up on the 1NZ-FE, it said EGR was eliminated because VVT-i can create its own exhaust gas recirculation with valve overlap.

AND, every 1NZ I've seen at importers doesn't have EGR.


Sent from my iPod Touch

[salmanghiyas]

Im done with the EGR code ... Had to completely transfer EGR mechenism from stock headers to my custom made ...

[salmanghiyas]

But the big problem is here now ....

P0171 system too lean

As ive already stated im with followings mods right now

1zz tb
1zz IM
Custom headers
Custom down pipe

And a blitz SRI ...

Im attaching some pics for clearity ...

But i think this CEL started coming after the blitz SRI ... Currently i have converted the SRI into CAI ... And the cone is mounted out from the passenger's side head light ...

Another thing is that ... Im getting this system too lean CEL only on idle ... On normal driving or on wot .. not CEL's

Afr when SRI was
Idle : 15 to 16
Wot : 12.6

Afr when CAI was
Idle : 16, 17, 18 and a point was 19 as well
Wot : 11.4

[salmanghiyas]

Chk plz

[mitchell12]

Something to do with your AFM no doubt. The tubing that runs into it affects how it interprets the airflow and if it thinks more air or less air is coming in than actually is then you will run rich or lean respectively.

My opinion anyways.


Actually on second thought it could have to do with your EGR setup I think too.

[CTScott]

Is that Blitz made for the Yaris? It looks larger in diameter at the MAF than it should be.

[mitchell12]

Is that Blitz made for the Yaris? It looks larger in diameter at the MAF than it should be.

Eh.... Yea I meant maf... this is the newest car I have ever owned by a long shot lol. Keep forgetting.

[salmanghiyas]

Is that Blitz made for the Yaris? It looks larger in diameter at the MAF than it should be.
Yes ... It just looks bigger ... But it is for yaris ...

[salmanghiyas]

Chk this out

[salmanghiyas]

Its .. sort of a velocity stack ... But in metal

[salmanghiyas]

Some more pics ...

[LTHatch]

Salmanghiyas: Any chance you can make a video of how it sounds with all those modifications? Very nice!

[salmanghiyas]

http://youtu.be/TA0YtiYGpqg

[salmanghiyas]

Thanks LTHatch
Will upload it soon ...

[woops]

What kind of am air filter is that?

If it is a filter that is lubed, that may be a problem too as they are known to confuse MAF sensors

[salmanghiyas]

What kind of am air filter is that?

If it is a filter that is lubed, that may be a problem too as they are known to confuse MAF sensors

hey woops ...

im confused about what is AM air filter and lubed ?

kindly explain ... and did u watch the Video i shared ?

[WeeYari]

There are two types of air filters. Dry and oiled. Lubed is referencing the oiled filter.


Sent from my iPhone using Tapatalk

[salmanghiyas]

There are two types of air filters. Dry and oiled. Lubed is referencing the oiled filter.


Sent from my iPhone using Tapatalk
Its the dry one ...

[mitchell12]

Honestly you have too much on the go for anyone to properly diagnose over the internet.

[woops]

when you change the intake tubing

you need to make sure that the new intake tubing is of the same diameter specially the section where the MAF is fit.

if your PCV is not good it may as well act as a vacuum leak

low fuel pressure can also set that code.. check fuel pressure using a gauge and not the piss-shoot-projectile feel method.

[fascar228]

Salman where in Pakistan are you?

[salmanghiyas]

Salman where in Pakistan are you?
Karachi ... do i know u