Gary's Track Day/Fast Road Weekend Car 1zz Turbo.. Now Built 2zz Turbo

Started by Gaz2405, March 11, 2019, 20:39

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threepot

I'm a bit perplexed on the ECU Master EMU idle settings for these Denso return springless pwm things... there are settings for frequency in hz etc, "3 wire PWM no spring", etc.

The one on my mates Ignis Turbo was setup by some "proper tuning place", but the coil block was unscrewed and the valve all seized up. It never idled consistently.

I've got it actually working, and it mostly hits its target idle pretty quickly, and catches before it stalls etc. But I just fudged about with stuff I don't know about... here is a picture of my settings:-



Would you share your setting to see if I'm barking up the right tree with the config?

Gaz2405

Quote from: threepot on January  5, 2023, 18:53I'm a bit perplexed on the ECU Master EMU idle settings for these Denso return springless pwm things... there are settings for frequency in hz etc, "3 wire PWM no spring", etc.

The one on my mates Ignis Turbo was setup by some "proper tuning place", but the coil block was unscrewed and the valve all seized up. It never idled consistently.

I've got it actually working, and it mostly hits its target idle pretty quickly, and catches before it stalls etc. But I just fudged about with stuff I don't know about... here is a picture of my settings:-



Would you share your setting to see if I'm barking up the right tree with the config?


Yeah no worries, just on my phone at the moment, but will fire up the laptop tomorrow
1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

Gaz2405

Quote from: threepot on January  5, 2023, 18:53I'm a bit perplexed on the ECU Master EMU idle settings for these Denso return springless pwm things... there are settings for frequency in hz etc, "3 wire PWM no spring", etc.

The one on my mates Ignis Turbo was setup by some "proper tuning place", but the coil block was unscrewed and the valve all seized up. It never idled consistently.

I've got it actually working, and it mostly hits its target idle pretty quickly, and catches before it stalls etc. But I just fudged about with stuff I don't know about... here is a picture of my settings:-



Would you share your setting to see if I'm barking up the right tree with the config?


Idle settings below @threepot 👍

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1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

Gaz2405

Half an hour on the car this morning.

Replaced the PCV valve with an larger diameter 3/8 BSP, threaded barb.

Both breathers now run in AN10 hosing to a 1L catch can which is now filled with steel wool/Brillo pads to act as baffles.

I'll see how this set up goes, as I also have a 2l baffled catch can to swap in.

I've also got the 3 port Mac boost controller wired in temporary to see how we get on, plan is to keep the peak boost of 18.5 psi and not let it tail off to 15psi at redline.

Planning on doing this by using the boost controller in open loop mode in the ECU, by monitoring and adjusting the duty cycle required, as last time I had issues with the PID settings trying to get the closed loop working.

Was hoping to get our this weekend, but the weather wasn't playing ball.

Few engine bay pics below to give you a flavour.

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I'm also getting some time on a local rolling road to get some power runs in and do some tuning.

It'll be interesting to see how by "road tune" looks.   
1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

Gaz2405

Went to take the car out today....


Didn't go to plan.

Once the revs are up to 3k, they won't drop without letting the clutch out in gear to try and stall it.

It's not a stuck throttle cable or throttle body, I've checked manually with the throttle body and the TPS is at zero.

My first thought is a knackered IACV after I've been tried reviving the old one.

I'm positive it's not a vacuum leak.

So I've ordered a new IACV to see if it fixes the problem.

1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

Gaz2405

One thing I thought it could have been, whilst out trying to fix it.

The only things I've done since last going out in it are:

1. 'sort' the IACV, which meant quite a bit of boost pipe work off.

2. Update the ECU's firmware.

Whilst out in the car I reverted the firmware back just incase.
1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

threepot

Can you slip the inlet pipe off the throttle body, then put your finger down the hole and block the IACV orifice on the side? If it stalls instantly you know there is too much air going round the idle control bypass route for whatever reason.

Gaz2405

Quote from: threepot on January 15, 2023, 19:42Can you slip the inlet pipe off the throttle body, then put your finger down the hole and block the IACV orifice on the side? If it stalls instantly you know there is too much air going round the idle control bypass route for whatever reason.

Yeah I might try that 👍
1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

Gaz2405

I've also got rid of my PCV for a non valved version, but cant think that would do anything.
1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0

threepot

It did cross my mind to suggest something to do with the PCV system, after all it is a potential source of unregulated intake... see if it changes the idle when you take the oil filler cap off, or crimp the hose on the PCV barbs.

On some aftermarket turbo cars, the PCV one way valves blow apart as the plastic frames for the mushroom valve inside was never designed to withstand the boost pressure. And on stuff like VAG 2.0 tfsi they just fail all the time anyway because its chinese plastic trash  :))

Gaz2405

Quick hour on the car tonight.

I've swapped my IACV, with a known working one from my 1zz which was in nearly new condition. (Different part numbers but they are interchangeable)

I've left the PCV as is, as I can't think how that would affect it as I've got them venting to atmosphere.

Inspected all the boost pipes and reconnected.

Also found another cause of a rattle, exhaust clamp just catching in the crash bar.

Won't know if it's got it until a test drive.
1zz turbo. Home built and home mapped.

Now 2zz turbo. Home built and home mapped

Build thread https://www.mr2roc.org/forum/index.php?topic=67004.0