"Parmas" Motor

[rob323]

Yes, that was why I emailed them. To make sure.
I haven't played enough with these motors to find out just where the cam sits when the vvti solenoid is unplugged but maybe that is the best way for you to do it now unless you can get the continuously variable control working.

[cali yaris]

^ we know that works too. Just not as much control in tuning.

[Bluevitz-rs]

Originally Posted by rob323

Yes, that was why I emailed them. To make sure.
I haven't played enough with these motors to find out just where the cam sits when the vvti solenoid is unplugged but maybe that is the best way for you to do it now unless you can get the continuously variable control working.

It reverts to the 0° position.

[rob323]

So does the vvti just retard the cam, or advance it?

[Parmas]

Originally Posted by rob323

So does the vvti just retard the cam, or advance it?

The VVTi retard and advance the camshaft angle based on the engine:

- RPM
- Temperature
- Load

If you see the image below you can notice that the camshaft is being advanced or retarding according these factors. Although there are six diagrams of camshaft angles, three of them are matched with others. I marked them for you to understand with ease.

It is hard to notice correctly if the overlaps are the same but if you see accurately, the camshaft angle figures are labeled with a 7-digit number. Some of them are actually the same label so it makes me think that infact they are at the same position.

So lets make a summary of this:

Camshaft Angle 1 - Fully Retarded

During idling \ Light Load (1a) = At Low Temperature (1b) = Upon Starting \ Stopping Engine (1c)

Camshaft Angle 2 - Fully Advanced

At medium Load (2a) = In low to Medium Speed Range with Heavy Load (2b)

Camshaft Angle 3 - Retarded but more advanced than Angle 1

In High Speed Range with Heavy Load


Still.... if you notice the 2nd and 3rd diagrams you will notice that the valve has only two ports and not three, which I am thinking are Angles 1 and 2. So that makes me think, where would the valve be at Angle 3?

[Yaris Hilton]

Got a link to that 1NZFE Spec Details.pdf document?

[Parmas]

Originally Posted by Yaris Hilton

Got a link to that 1NZFE Spec Details.pdf document?

http://www.autoclub72.ru/forum/index...e=post&id=1552

[Parmas]

Originally Posted by cali yaris

The AEM EMS has a wizard for Toyota motors, I believe it automatically sets parameters for VVTI. So I'm not sure I'll be able to answer your question, but Art is going to look into it further.

Garm I have an idea..... if we connect an oscilloscope on the signal wire of the valve timing control on a stock 1NZFE with a stock ecu, we could know eventually the frequency and duty cycle at all rpm ranges.

The problem is I don't own one damn... or else someone could check with a toyota expert on this .... maybe H3ilton


Edit: I found a waveform of the camshaft timing valve here on page 33 http://www.etimago.com/yaris/repairm...%20Control.pdf

Can anyone translate it in terms of frequency or duty cycle?

I uploaded some pages of the manual that relates to VVT information

[cali yaris]

wow, now that is over my head, sorry!

[Parmas]

I told this to a friend and he said that from the look of the waveform he concludes that it is at:

Frequency 1000Hz because frequency = 1 \ t and since the waveform shows 1ms\div so = 1 \ 0.001s = 1000Hz

Duty 33% because the waveform shows 3 pulses each about a bit longer than each division. Since there are 10divisions and 3 pulses (each a bit longer) ......... so 1pulse = 1.1 x 3 = 3.3.... 3.3div out of 10div = 33%

Garm can your tuner confirm this?

[cali yaris]

I haven't heard back yet

[Parmas]

Explained more in detail from where these values came.... if there is a mistake don't hesitate to post why and of course the right answer :)

By the way previous tuner set these values to 60Hz and 7.1% in which if the "new" values are correct, with the present values I have on my ecu there is a high possibility that the valve is never being activated and it is always on the most retard state at all loads and rpm!!! that explains roughy state etc...

[rob323]

I don't think your frequency value is correct. If each division is one millisecond (which isn't entirely clear), then each pulse appears to be about 3.5 milliseconds apart, which correlates to approx. 285Hz. I agree with the 33% duty cycle amount though.

[Yaris Hilton]

Thanks for the link, Parmas!

[Parmas]

Update:

Today I went to my tuner and we began to check the Stock Crank Trigger in order to configure the ecu accordingly. We found out that the stock toyota crank sensor has a sense config of 37 -3 (Please anyone confirm this) in which the present ecu do not accept this triggering. Infact the ecu is configured to 36 -1 which do not represent my setup....

Please garm or anyone can you confirm this 37-3 triggering?

[rob323]

I can confirm from my Echo manual that it has 34 teeth, so your 37-3 config might be correct.

[Parmas]

Originally Posted by rob323

I can confirm from my Echo manual that it has 34 teeth, so your 37-3 config might be correct.

Thanks rob that relievs me from doubts!

Anyother who wish to confirm this trigger feel free especially garm

[Bluevitz-rs]

It's actually 36 minus 2.

This is info coming from a Toyota Canada Technician Trainer.

Edit: So there should be 34 teeth, but only minus 2, not 3.