NB Idle valve issue - PWM valve running DIYPNP MS2 - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-03-2014, 05:32 PM   #41
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Quote:
Originally Posted by Reverant View Post
Tom, IIRC your ECU has the expansion board that already does the hardware multiplication.

If you switch to 1x and the valve doesn't buzz, then you have the hw multiplier and in this case, increasing the software multiplier makes it worse.
Nice, I'll give it a try if I can figure out how to do it. This is how the Idle Control looks in the current version of TS with MS2/Extra v3.3.1:



The lowest I can set is 31 Hz - would that be the equivalent of a x1 multiplier?

Cheers,
- Tom
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Old 02-03-2014, 05:52 PM   #42
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Correct.
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Old 02-03-2014, 07:21 PM   #43
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OK so if I understand correctly, the new firmware (3.3.1) doesnt really do anything different from the old firmware (3.2.5), they just changed the terms and gave you frequencies up to 480hz which is the equivalent of a 16x multiplier? So using ~300hz you have about a 10x multiplier and have lost resolution. If 156hz the valve works at 2% steps then it works at 4% steps a 300hz, correct?

Rev, is this why you put in the expansion board or is that spec'd out individually on your MS2/Extra builds?
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Old 02-03-2014, 09:52 PM   #44
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Hector, the inversion is required as when you add the expension board it inverts the output. This change can simply be done in the software.

I'm not sure what other versions of MS have what hardware.
I am running a DIYPNP2.
DIYPNP MegaSquirt installation for the Mazda Miata

Originally I started with Firmware 3.2.1 and then moved over to 3.2.5 (can anyone say it is worth while going over to 3.3.1?)

Using TunerStudio 2.5.05
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Old 02-04-2014, 12:30 AM   #45
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Quote:
Originally Posted by one-niner View Post
Nice, I'll give it a try if I can figure out how to do it. This is how the Idle Control looks in the current version of TS with MS2/Extra v3.3.1:



The lowest I can set is 31 Hz - would that be the equivalent of a x1 multiplier?

Cheers,
- Tom
Mine don't look like that D: I must need to update. Our is my ms2pnp.
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Old 02-07-2014, 12:20 AM   #46
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Did setting your mspnp2 to pwm closed loop fix your high idle issue? I have the same issue with my mspnp2. I'm running firmware 3.3.0. As soon as my car starts it idles at 2k + even with the idle screw all the way closed.
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Old 02-07-2014, 07:26 AM   #47
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Im not sure who you are referring to but the OP resolved the issue in post #30 in this thread. It was a "phantom" fix. Also, he has a DIYPNP and not MSPNP2. They are MS2 based but not exactly alike.

BTW, DIYAutotune has fantastic support.
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Old 01-22-2015, 04:21 AM   #48
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Im experiencing the exact same problem with the same settings as above. I tried disconnecting the iac, but shoud it return to closed by itself? It revs to about 3k all the time with or without the iac connected.
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Old 01-22-2015, 12:15 PM   #49
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Blinded the IAC. Problem gone. It was stuck halfway open...
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