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Old 07-17-2012, 02:55 AM   #1
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Default A/C Idle Up

This is going to sound stupid, but where the heck is the A/C idle up settings on the MSPNP2 within TunerStudio? I have searched for a while now, and can't seem to find the map within the software. Got the car idling well, and running pretty good now at about 11psi but the A/C at idle just about kill it. I found this pic on here, but can't seem to find the setting from within TunerStudio.

https://www.miataturbo.net/attachmen...-c-ac-duty-jpg
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Old 07-17-2012, 03:02 AM   #2
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That table is not available with the MSPNP2, it is only available on the Enhanced MS2 that I build.
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Old 07-17-2012, 03:04 AM   #3
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Thanks for the reply. What are my options to help the cause then? I was under the impression that this new gen2 had this natively. Or is it just the A/C control, and not the idle up?
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Old 07-17-2012, 03:12 AM   #4
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I'm no expert when it comes to the MSPNP2. DIYAutoTune.com should be able to help you.
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Old 07-17-2012, 09:16 AM   #5
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Old 07-17-2012, 09:32 AM   #6
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the MSPNP2 handles the a/c idle up function outside of software, iirc. Contact diyautotune.com for details.


please dont go reloading random firmware on it like aaronc7 has suggested.
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Old 07-17-2012, 11:09 AM   #7
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Quote:
Originally Posted by wolfram View Post
This is going to sound stupid, but where the heck is the A/C idle up settings on the MSPNP2 within TunerStudio? I have searched for a while now, and can't seem to find the map within the software. Got the car idling well, and running pretty good now at about 11psi but the A/C at idle just about kill it. I found this pic on here, but can't seem to find the setting from within TunerStudio.

https://www.miataturbo.net/attachmen...-c-ac-duty-jpg
The A/C idle up is an analog dial. It's hiding under the MAP hose in this picture.



Adjusting it will change how much extra current it runs through the IAC valve when the A/C is on.
Attached Thumbnails
A/C Idle Up-jumpers.jpg  
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Old 07-17-2012, 11:58 AM   #8
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My bad. Didn't realize mspnp2 needed its own separate firmware.

Edit: appears to be same firmware.... you could probably upgrade firmware if you wanted to be able to control it thru software. Still check with DIY.

Last edited by aaronc7; 07-17-2012 at 12:27 PM.
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Old 07-17-2012, 03:08 PM   #9
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Thank you for the post Matt... Kinda wish I'd made this thread several years ago.
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Old 07-17-2012, 03:09 PM   #10
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Quote:
Originally Posted by aaronc7 View Post
My bad. Didn't realize mspnp2 needed its own separate firmware.

Edit: appears to be same firmware.... you could probably upgrade firmware if you wanted to be able to control it thru software. Still check with DIY.

this is acceptable

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Old 07-17-2012, 03:48 PM   #11
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Quote:
Originally Posted by aaronc7 View Post
My bad. Didn't realize mspnp2 needed its own separate firmware.

Edit: appears to be same firmware.... you could probably upgrade firmware if you wanted to be able to control it thru software. Still check with DIY.
The MSPNP Gen 2 uses the current stable firmware release (3.2.1), but there is no provision in it for bringing the A/C signal to the processor. You'd need to do a couple wiring changes to use the firmware based idle up.
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Old 07-17-2012, 07:13 PM   #12
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The wiring changes are minor and easy for anyone to do with basic soldering skills. There are good docs on ms2/extra forum on all the firmwares that support software based idle up. This code is based on the later MS3 code and is now being supported by the ms2 developers.

Btw - Reverant is wrong is saying his kits are the only way to get this. Anyone with a ms2 (including Reverant built) can upgrade and get the better idle handling code in the later releases.

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Old 07-18-2012, 03:26 AM   #13
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Quote:
Originally Posted by gslender View Post
Btw - Reverant is wrong is saying his kits are the only way to get this. Anyone with a ms2 (including Reverant built) can upgrade and get the better idle handling code in the later releases.
I stand by what I said. My Enhanced MS2 is the only Megasquirt that has the table posted above. Prove me wrong.

I would also ask that you do not tell people that have my Enhanced MS2 to switch to other firmware variants, when you don't know that doing this can cause them to lose half the features their ECU has.
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Old 07-18-2012, 03:37 AM   #14
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Dimitris, is the source available for the Reverant variant? I know vanilla kits won't have all the hardware, but it's still cool to review.

Do you submit any changes back to the extra guys?

EDIT: And right at this moment, I have 777 posts and you have 3333. Thank you for listening.
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Old 07-18-2012, 03:48 AM   #15
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PMed.
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Old 07-18-2012, 05:01 AM   #16
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Quote:
Originally Posted by Reverant View Post
I stand by what I said. My Enhanced MS2 is the only Megasquirt that has the table posted above. Prove me wrong.

I would also ask that you do not tell people that have my Enhanced MS2 to switch to other firmware variants, when you don't know that doing this can cause them to lose half the features their ECU has.
...easy tiger!

The OP was asking generally how to get AC Idle up. You provided a post saying that your custom ECUs that you sell is the only way to get that table and by inference may lead people to think your kit is the only solution. The OP used a pic to reference the only thing he/she could find, and I took it that it was an example, and not limited to that as an answer. You took the opportunity to say only your kit offers the table, but you conveniently failed to mention that other solutions exist that can also solve the AC Idle Up for MS2/MS3.

As for telling people to upgrade ... As you don't openly publish anything about your kits, how would anyone know at all what they would loose or not.

Also, I never instructed anyone specifically that they must, just that they can. If they loose functionality then I guess they would need to assess that (and hopefully you've been clear about that when you built/sold them a kit??).

They could always roll back if they find they don't like it... unless of course you don't provide the custom firmware to your customers? In which case, I'd be worried about that!!

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Old 07-18-2012, 06:06 AM   #17
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I specifically replied that the specific table quoted is only available on my own ECUs. Nothing more, nothing less.

I do provide the firmware if someone makes a booboo, in fact in most cases I perform the firmware upgrade myself as a free service, to make sure the upgrade goes smoothly.
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Old 07-21-2012, 02:02 PM   #18
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Back on topic....

Seems that I just need to open this guy up and adjust the analog dial? That pretty much it?
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Old 07-21-2012, 02:29 PM   #19
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correct.
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Old 07-21-2012, 03:34 PM   #20
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yup. just did it, and it works like a charm! On a side note, what is the general consensus on electronic boost control, open loop or closed loop? I think the problem i am going to run into is not having a TPS to tell the system how to properly navigate the target maps. Any ideas? I will move this to another topic if needed.

Thanks ya'll!
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