2JZ trigger

[pc1010]

Hi Everyone.
I am new in the RusEFI, but so far I find it amazing with all of the features packed in STM32
I am trying to set up a 2JZ trigger, recently called "Toyota 3 Tooth", it has two parameters "2JZ Position" and "2JZ Precision".
What do these parameters mean? How can I set these?
I am referring to the newest version after commit https://github.com/rusefi/rusefi/commit/1c154f6ee7bae858617fd3a611cf318dbc072bd8
My setup looks like the one below:

trigger_TT_2JZ_3_34.png (32.7 KiB) Viewed 12830 times

[AndreyB]

Those have default values which hopefully just work. That specific cam is a but unusual and parameters are used to designate one of the three teeth as sync tooth.

Also that image you are referencing should not have been published Just updated https://github.com/rusefi/rusefi/wiki/All-Supported-Triggers#334-version and pushed https://github.com/rusefi/rusefi/commit/eda6435b18b01f1ce9de123a2407a93a75d3fc10

[pc1010]

Simulation Only? Does that mean that this pattern should not be used on an actual car yet?
If it comes to Trigger Angle I have it dialed in perfectly with timing light, but the VVT Offset Value, and these 2 parameters I have no idea how to even go near them
I have seen some ECUs have assisted features to set the CAM Offset, maybe that would be doable to implement in RusEFI some time in future?

QtBN50X.png (48.59 KiB) Viewed 12792 times

[AndreyB]

"dev 2JZ 3/34 simulator" option should not be used on real vehicle.

On real vehicle you should setup crank wheel separately and cam/vvt wheel separately to account for belt flex, something similar to https://rusefi.com/online/view.php?msq=1544&dialog=triggerConfiguration

[pc1010]

Thank you Andrey, it works perfectly

[pc1010]

Hi once again.
I got it to run, but I have a problems with idle on cold engine.
I noticed that stock ECU retards VVT on cold engine, also other standalone ECUs give you the possibility to do it.
Is it possible to add that feature?
Thanks!

VVTi_Settings.JPG (20.73 KiB) Viewed 12668 times

[Dron_Gus]

Hi once again.
I got it to run, but I have a problems with idle on cold engine.
I noticed that stock ECU retards VVT on cold engine, also other standalone ECUs give you the possibility to do it.
Is it possible to add that feature?
Thanks!

VVTi_Settings.JPG

Subaru's stock ECU does some AVCS and ignition retard to help faster warmup of catalytic converter. On idle and low loads. Not sure about toytota.

[pc1010]

I think it's similar, in my case the engine runs smoother on cold retard

[Dron_Gus]

I think it's similar, in my case the engine runs smoother on cold retard

Subaru rotates exhaust for earlier open of valves. Is it retard or advance? So fuel is still burning and warms cat.
This least for few minutes at start. Also secondary air pump is enabled during this cat warmup.
Disabling of this feature is big fuel-saver on cold weather and short runs.

[pc1010]

I think it's more retarded, the angle is closer to 0 (home position as I understand) when the engine is cold, than when it's warmed up.
Correct me if I'm wrong

[pc1010]

Hi, I don't know if I'm doing something wrong here.
I was running the stock ECU in parallel to do the ignition timing until I am sure all is good.
Now I switched all ignition to RusEFI and found out that my trigger angle 95 deg is way off and the ignition is pretty much advanced.
During the time I found a similar tune on RusEFI online and looks like it should be 170 degree. I entered that value and it is pretty much alright, now the AFR is all good and the idle dropped to the stock value.
The only thing is that the VVT stopped working. I found out that when I enter anything more that 130 degree of trigger offset, the VVT stops and does not change value, no matter if I change the cam offset, or the magic values.
Could it be some bug, or am I an idiot?
One log is taken with trigger offset 130 and another one 170. You can see there the VVT angle for intake cam is standing still on the latter one...

[AndreyB]

https://github.com/rusefi/rusefi/wiki/HOWTO-upload-tune
https://github.com/rusefi/rusefi/wiki/HOWTO-upload-log

Let me lock this thread since too many separate questions were already touched. Let's have separate threads focusing on specific isolated areas.