Notices
MEGAsquirt A place to collectively sort out this megasquirt gizmo

NB Idle valve issue - PWM valve running DIYPNP MS2

Old Feb 3, 2014 | 04:32 PM
  #41  
one-niner's Avatar
Junior Member
 
Joined: Sep 2010
Posts: 80
Total Cats: 1
From: Denmark
Default

Originally Posted by Reverant
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
Attached Thumbnails NB Idle valve issue - PWM valve running DIYPNP MS2-xb03.jpg  
Old Feb 3, 2014 | 04:52 PM
  #42  
Reverant's Avatar
Elite Member
iTrader: (10)
 
Joined: Jun 2006
Posts: 6,020
Total Cats: 369
From: Athens, Greece
Default

Correct.
Old Feb 3, 2014 | 06:21 PM
  #43  
hector's Avatar
Senior Member
 
Joined: Apr 2011
Posts: 913
Total Cats: 217
From: Hollywood, FL
Default

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?
Old Feb 3, 2014 | 08:52 PM
  #44  
wydra's Avatar
Thread Starter
Newb
 
Joined: Jul 2012
Posts: 20
Total Cats: 0
Default

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
Old Feb 3, 2014 | 11:30 PM
  #45  
Impuls's Avatar
Senior Member
iTrader: (1)
 
Joined: Jan 2012
Posts: 754
Total Cats: 19
From: Tampa, FL
Default

Originally Posted by one-niner
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.
Old Feb 6, 2014 | 11:20 PM
  #46  
zero415's Avatar
Junior Member
 
Joined: Aug 2013
Posts: 74
Total Cats: 1
From: Madison, In
Default

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.
Old Feb 7, 2014 | 06:26 AM
  #47  
hector's Avatar
Senior Member
 
Joined: Apr 2011
Posts: 913
Total Cats: 217
From: Hollywood, FL
Default

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.
Old Jan 22, 2015 | 03:21 AM
  #48  
Teejay187's Avatar
Junior Member
 
Joined: Jul 2013
Posts: 85
Total Cats: 48
From: Norway
Default

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.
Old Jan 22, 2015 | 11:15 AM
  #49  
Teejay187's Avatar
Junior Member
 
Joined: Jul 2013
Posts: 85
Total Cats: 48
From: Norway
Default

Blinded the IAC. Problem gone. It was stuck halfway open...
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ndragun
MEGAsquirt
0
Sep 20, 2015 10:28 PM
huesmann
MEGAsquirt
19
Sep 16, 2015 07:11 PM
vehicular
General Miata Chat
12
Sep 14, 2015 03:17 PM
compuw22c
MEGAsquirt
4
Sep 12, 2015 07:42 PM
Backwoodsballer
General Miata Chat
0
Sep 4, 2015 06:39 AM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 11:32 PM.