Toyota 3SGE Beams VVTi code

[mr2.3sge]

Hi guys,

I started my project and I would like to use fully Sequential injection and spark using the OEM COP's.
This engine is a 98 4Cyl. 3SGE Beams Red-Top with VVTi on intake cam. This is a JDM engine and a 4Cyl. version of 2JZ VVTi (square engine, VVTi on intake cam) and I think that the 3SGE VVTi crank gear has the same teeth as 2JZ VVTi. There is a 3 teeth wheel on intake cam as 2JZ.

I selected the 2JZ VVTi Spark mode but the tunerstudio generates an error because this spark mode cannot support 4Cyl engines.

I'm opening this topic to ask for your help. Can you please make a 3SGE VVTi code?

Here it is the composite log file to show you the crank&cam specs.
tell me if you need more info.

[jsmcortina]

Have you confirmed the tooth#1 angle as Matt suggested in the other topic?

James

[mr2.3sge]

I have an alloy crank pulley and I still didn't put a 0º mark on this pulley to check it correctly, but I think that will be around 210º.

These images were captured @TDC

[jsmcortina]

To get it right you need to do what Matt said in the other post - run the engine in "Toothed Wheel" mode using wasted spark or wasted-COP and semi-sequential fuel. You can confirm the exact tooth#1 angle with a strobe. That correct number can then be built into the 4-cyl 2JZ mode.

James

[mr2.3sge]

I did it but the engine starts and goes down. It might be the idle valve control.

I'll remove the crank pulley tomorrow and make a mark on it.
Thanks for your support

[mr2.3sge]

Hi again,

I have already found the tooth #1 correct angle. The value is 226deg.

I tried to start the engine but every time I did it, the engine only ran for a few seconds. I did some Datalogs changing the Cranking RPM from 700 to 500 but it seems to be worse. Do you have any idea why it is happening? Sorry but I'm new with these things.

[jsmcortina]

Is that tooth#1 angle confirmed with a strobe?

This is really a tuning question now.
From the looks of it you only have a narrowband O2 sensor, that makes it difficult to use.

Do you have a specific reason to use Alpha-N as the fuel algorithm? As a guess I think you are running too lean. When in cranking mode, you are getting a pulsewidth of 5.6ms, when the engine gets to higher RPMs and uses the VE table, the pulsewidth plummets to 1.5ms.

James

[mr2.3sge]

Yes I confirmed this angle with a strobe.
Do you will develop a new 3S VVTi code? How many time do you think it can take? Just to know what I'll do now.

I'm using Alpha-N because this engine has a MAF sensor but I don't know the MAF curve. I have 2 MAP sensors here but I still didn't connect them.
Thanks I'll open a new topic in "MS3 General Support" section.

[jsmcortina]

Please try the pre-1.4 development code. It already allows 4cyl with 2JZVVTi mode. For the same exact timing, you may need +11 deg in the offset field.

James

[mr2.3sge]

Many Thanks I'll do it

[mr2.3sge]

The engine doesn't start with the 2JZ VVTi mode. It seems not to be on correct ignition timing because of intake "bangs". I re-checked the tooth #1 angle and that's correct (226deg).

I tried to change the "timing for fixed advance" but there is no any change. I don't know why.

I made a composite log again to see what is happening with the engine sync. Seems there is some noise on CMP, so I enabled the noise filter on secondary tach for 500uSec, turned on the Tach period rejection for 0,4ms and for 30%. I don't know if I can put this specs but the Lost sync counter reduced a lot.

The engine still the same and doesn't start.

[jsmcortina]

With a dirty cam signal there will be problems for sure.

What timing do you see on your strobe?

James

[mr2.3sge]

This is the composite log I made. I'm talking about this noise on CMP wave.

It's a old strobe. I sync the timing light with 0deg mark and then tried to move it with fixed timing advance

[mr2.3sge]

I saw that you, on "2JZ VVTi syncloss" topic, told that we cannot connect the CMP- and CKP- at the same pin. Why? I done it because Matt told me to do.

[ragepower]

What timing do you see on your strobe?

I was helping him. When using strobe, if you change the trigger offset, it will change the position of TDC mark. But If you change the "timing for fixed advance", the position of TDC mark won't change.

[mr2.3sge]

need help... :/

[jsmcortina]

I tested on the bench the other day before posting and the ignition outputs lined up the same with your previous MSQ and the 2JZZ mode enabled with the offset I mentioned.

James

[mr2.3sge]

And about that CMP noise? Should I be worried and/or change the wiring?

[jsmcortina]

And about that CMP noise? Should I be worried and/or change the wiring?

Yes, that needs fixing. It isn't going to work with the noisy cam signal. Have you applied a "shunt" resistor across the CMP+/- connections?

James

[mr2.3sge]

No, I connected them as the OEM connection.
What is the resistor value that should I place?