Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > ECUs and Tuning > MEGAsquirt
Reload this Page >

How to control NB2 AC fan on MSLabs MS3 Basic when using single fan?

MEGAsquirt A place to collectively sort out this megasquirt gizmo
Sponsored by:
Sponsored by:

How to control NB2 AC fan on MSLabs MS3 Basic when using single fan?

 
Old 02-04-2019, 08:02 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Jul 2016
Location: Orlando, FL
Posts: 145
Total Cats: 2
Default How to control NB2 AC fan on MSLabs MS3 Basic when using single fan?

On a 2002 NB2 when using an MSLabs Megasquirt MS3 Basic. What settings do you use to control a single fan off the drivers side engine cooling fan plug to operate when AC switched on? How to control NB2 AC fan on MSLabs MS3 Basic when using single fan?

Got rid of my air conditioning "passenger side" fan due to space restrictions. Using the engine fan plug to control a single Spal low profile in the center of a Trackspeed radiator. Would like to program the MS to activate the single fan when AC is energized independent of engine temp control.

Believe you can change Fan Control output pin after changing Programmable On/Off outputs and port settings? I'm getting over my head quickly just stating that, and don't want to hose something?

Both fans worked great when running dual stock fans. Now the single fan works great for engine control, but not for AC also.

Screen shots would be nice as programing is not my forte. And yes I've searched a bunch of threads back several years.
Blkbrd69 is offline  
Old 02-05-2019, 06:45 AM
  #2  
Senior Member
 
Join Date: Apr 2011
Location: Hollywood, FL
Posts: 647
Total Cats: 62
Default

First thing I would do is email Reverant and get it straight from him.

If not, this is on a regular MS3Pro running 1.4.0 and NOT MSLabs so I don't know if you have the same .INI file or whatever they call it. If not like this look for a fan control dialog somewhere in the tune. If nothing there, try going to programmable outputs, find the output you have the fan on and see if you can do an "or" command to turn on fan.

BTW, I think you are going to miss the second fan. On my old set-up I couldn't get both fans working and AC at idle sucked. Once both fans worked, it is at least managing the high side pressures in hot weather so the AC does something at idle. It's hard to make the AC work at idle without that other 1400 CFM sucking out heat.

hector is offline  
Old 02-05-2019, 12:11 PM
  #3  
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,584
Total Cats: 241
Default

Originally Posted by Blkbrd69 View Post
On a 2002 NB2 when using an MSLabs Megasquirt MS3 Basic. What settings do you use to control a single fan off the drivers side engine cooling fan plug to operate when AC switched on? How to control NB2 AC fan on MSLabs MS3 Basic when using single fan?
This is already the default on the basemap.

The cooling fan is on InjE, the A/C compressor is on InjF and the A/C fan is on InjG. The cooling fan is configured to switch on when you enable the A/C through TunerStudio, and the A/C fan is also activated when the compressor is engaged through hardware on the mainboard. Ie activating InjG in test mode activates both the A/C compressor and the A/C fan.
__________________
Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
MS Labs: Plug and Play Megasquirt ECUs for ANY 90-05 Miata (NA, NB1, NB2 w/VVT, MSM), including basemaps to get you started ASAP. PM me or email or details.
For support on MS Labs ECUs: Please email, be sure to include the unit's serial number and include a datalog and your current map.

Last edited by Reverant; 02-05-2019 at 01:32 PM.
Reverant is offline  
Old 02-05-2019, 09:04 PM
  #4  
Junior Member
Thread Starter
 
Join Date: Jul 2016
Location: Orlando, FL
Posts: 145
Total Cats: 2
Default

Ended up reconfiguring it and it didn't work, so went back to base settings and it works like a charm??

Thinking the flux capacitor just needed to be reset ???
Blkbrd69 is offline  
Old 02-25-2019, 08:50 AM
  #5  
Junior Member
 
Join Date: Jun 2009
Posts: 55
Total Cats: -3
Default

What is on Inj H then?

Both of my fans are set at 89c to turn on but actually they turn on one after another.

My idle drops too much when the fans come on any idea?
etang789 is offline  
Old 02-25-2019, 09:19 AM
  #6  
Design Engineer
iTrader: (1)
 
DNMakinson's Avatar
 
Join Date: Jan 2013
Location: Seneca, SC
Posts: 3,510
Total Cats: 468
Default

Originally Posted by etang789 View Post
What is on Inj H then?

Both of my fans are set at 89c to turn on but actually they turn on one after another.

My idle drops too much when the fans come on any idea?
See Hector's post in this thread. See the check box for allowing fan to control idle up. Tick in and then put in appropriate values delay (60 mS perhaps) and Duty % (1.5). Then also have some small RPM increase (25 RPM) so that (If you have set up for Advance idle correction) you will get an instant increase in Spark Advance due to the immediate detection of a -25 RPM error.

That takes care of the main fan, at least.

Pretty sure I have my A/C fan only coming on with A/C, as I have found no need for them both for cooling only.
DNMakinson is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Savington
Trackspeed Engineering - Miata Accessories
16
04-24-2017 02:57 PM
briswo
Miata parts for sale/trade
16
09-11-2016 02:34 PM
Ian
Miata parts for sale/trade
2
03-29-2016 11:27 AM
MiataRoadster
Miata parts for sale/trade
0
01-27-2016 12:32 PM
chris101
Miata parts for sale/trade
13
01-03-2016 04:05 PM


Thread Tools
Search this Thread
Quick Reply: How to control NB2 AC fan on MSLabs MS3 Basic when using single fan?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.