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Old 03-01-2008, 12:25 PM   #1
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Default MS questions.

1)Does the fuel pump wire off MS (purple) supply 12V or a ground?

Mine does not turn on the fuel pump. If I supply 12 to the pump itself it come on and runs fine.

2)What temperature should the stock computer turn on the electric fans?
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Old 03-01-2008, 12:33 PM   #2
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I think it sends out a ground, but you could easily measure it. It's designed to trip a relay, not drive the pump itself. 212* is when the stock fans come on IIRC.
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Old 03-01-2008, 01:04 PM   #3
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Quote:
Originally Posted by patsmx5 View Post
I think it sends out a ground, but you could easily measure it. It's designed to trip a relay, not drive the pump itself. 212* is when the stock fans come on IIRC.

I could easily test it if I knew it worked or I know what I was testing for. lol
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Old 03-01-2008, 01:06 PM   #4
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i believe the temp is closer to 206-207 for the main fan to turn on. the 2nd fan should turn on at a higher temp.
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Old 03-01-2008, 01:09 PM   #5
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Set meter to DC Volts, put black lead to ground, put red lead to MS Fuel Pump wire, turn on MS using the stim. The Fuel Pump LED should light for 2 seconds, then turn off. Your meter will either read Zero volts, or 12V. If zero put black lead on meter to 12V+ and retest.
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Old 03-01-2008, 01:19 PM   #6
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It provides a ground to the FP relay.
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Old 03-01-2008, 01:20 PM   #7
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Quote:
Originally Posted by patsmx5 View Post
Set meter to DC Volts, put black lead to ground, put red lead to MS Fuel Pump wire, turn on MS using the stim. The Fuel Pump LED should light for 2 seconds, then turn off. Your meter will either read Zero volts, or 12V. If zero put black lead on meter to 12V+ and retest.
Will do, thanks.



This picture shows the wire on the FP relay I attached the MS too. I have to go and check the wiring diagram but off the top of your heads, does it need a grd or 12v signal to turn on?
Attached Thumbnails
MS questions.-fuel_pump_lead.gif  
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Old 03-01-2008, 01:22 PM   #8
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Quote:
Originally Posted by cjernigan View Post
It provides a ground to the FP relay.
Thanks!
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Old 03-01-2008, 11:53 PM   #9
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Another Q:

On the target AF display table, mine is showing volts and I have seen others show AF, how do I change it to show AF? Must be a setting I'm missing....but where...
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Old 03-02-2008, 12:42 AM   #10
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don't know what gauge you have but here it is for the AEM UEGO LINEAR http://forums.plastikracing.net/view...?p=52097#52097
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Old 03-02-2008, 10:17 AM   #11
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Thanks, have to try that.
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Old 03-12-2008, 02:02 AM   #12
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ok tried that. Edited the "msns-extra.ini" np.

Than it says to edit the "MSQ" file.....how? Its not a TXT file? Am I missing something?

Below is the instructions.


AFR targets in "AFR" instead of "volts" for AEM_LINEAR

MSnS-E (as well as the MS2) give you the option to define AFR targets at certain kpa/rpm points. The problem with this is that if you use the AEM_LINEAR wideband, the configuration isn't set like it is with other linear widebands. Originally, if you choose the Innovate 0-5V wideband, the AFR targets table is set to accept AFR values. If you choose the AEM_LINEAR sensor, your target values can only be entered in volts like so:

Image

Unless you don't mind memorizing or looking up the voltage values for a specific AFR, this can be a pain in the ***. To change the configuration to accept AFR values, follow these steps:

1. Open msns-extra.ini in a text edit. Notepad is available on Windows systems so you might as well you that if you don't have an advanced text edit. For me, this file was located under: C:\Program Files\MegaSquirt\MegaTune225\MegaTune2.25\mtCfg\ms ns-extra.ini


2. Scroll down to #elif AEM_LINEAR. This can be found on line 808.


3. Change the code from:
Code:

#elif AEM_LINEAR

afrBins1 = array, U08, 0, [8x8], "Volts", 0.0196, 0, 0.0, 5.0, 2

to
Code:

#elif AEM_LINEAR

afrBins1 = array, U08, 0, [8x8], "AFR", 0.038666, 255.0, 10.0, 20.0, 1




4. Now you are going to need to edit your MSQ file. Otherwise, you will get an error saying that units do not match. Search for (line 586):
Code:

<constant cols="8" name="afrBins1" rows="8" units="Volts">

and replace it with
Code:

<constant cols="8" name="afrBins1" rows="8" units="AFR">




5. If you originally had AFR target defined in voltages, they will not appear correctly in MegaTune once you re-open your MSQ for editing. You will need to re-enter in the AFR target, but this time in AFR format instead of volts.



Here is the new AFR targets table with AFR values:

Image
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Old 03-12-2008, 02:34 AM   #13
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AEM is linear...right? Is there a sensor on the drop down menu (maybe other) list that would give AF for the AEM? That would be and easy fix, but which one?

Its standard 0-5V

Last edited by IcantDo55; 03-12-2008 at 03:08 AM.
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