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| Forum name | Engine Management Systems & Controllers |
| Topic subject | MS pulse width and battery voltage correction |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i54&topic_id=3361 |
3361, MS pulse width and battery voltage correction
Posted by wickedtalon, Aug-16-07 05:07 AM
I have a problem w/ turning on my headlights and it affecting my pulse width and AFR. I'm idling around 13.1:1 AFR but when I turn the headlights on the pulse width increases by .2 my AFR goes to 11:1.
What is your battery voltage correction #? Mine is set at 0.2
Should it be different.
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3364, RE: MS pulse width and battery voltage correction
Posted by Slushbox, Aug-16-07 10:16 AM
.10 here
This is from Megamanual:
Battery Voltage Correction (ms/V) (BatFac) is the number of milliseconds that MegaSquirt-II adds to each fuel injection pulse to compensate for the slower opening of the injectors with lower supply voltages. Generally 0.10 ms/V or 0.2 ms/V is about right.
Sounds like megatune thinks your battery voltages are a little looowwwww.
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3370, RE: MS pulse width and battery voltage correction
Posted by WickedESi, Aug-17-07 04:29 PM
Originally posted by wickedtalon
I have a problem w/ turning on my headlights and it affecting my pulse width and AFR. I'm idling around 13.1:1 AFR but when I turn the headlights on the pulse width increases by .2 my AFR goes to 11:1. What is your battery voltage correction #? Mine is set at 0.2 Should it be different.
If your running rich w/ the correction, try making the number smaller.
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