HeatRaveR Posted September 5, 2008 Share Posted September 5, 2008 So I've got MS-I V3 running 29v coding and as far as I can tell, the only fields I see for adjusting Barometric Correction (other than turning it on/off in the Constants page) is something about min and max kPa. What should these be set at, and what other settings do I need to input to get this function up and running? I did a Search, but it looks like this is something most people haven't needed to fiddle with or posted about. Since I'm going to be traveling up to the mountains soon, so I figured this might be a useful function to have enabled. Thanks! Quote Link to comment Share on other sites More sharing options...
mobythevan Posted September 5, 2008 Share Posted September 5, 2008 The limits are only used as a bandaid for unwanted processor resets. Because I am at high altitude (my normal kpa reads 77) I have the settings at min=60, max=103. The bottom line is that if you are having resets you need to fix that problem, but these settings might at least help you get back home. Here is the text from the extra manual which doesn't tell you much: As the barometric correction is determined when the ECU powers up if it resets during running the current MAP value is taken in, the chances are the engine will be creating a vacuum so the value would be incorrect. You can set up limits so the correction is not so far out if the ECU resets. See "Baro Corrections" If you are unsure set the minimum to 90 and the max to 100 KPa and it will have no real effects during a reset. See the table if you drive at high altitudes. Quote Link to comment Share on other sites More sharing options...
HeatRaveR Posted September 6, 2008 Author Share Posted September 6, 2008 I am normally at sea level, however, I'm going on a trip up to Colorado actually. So would your min/max values still apply to me? And other than these min/max values, is there anything else I need to input to make this work (other than just turning it on)? Quote Link to comment Share on other sites More sharing options...
mobythevan Posted September 8, 2008 Share Posted September 8, 2008 I believe that is it, just turn it on. You could use my values I guess, like they say it is only for resets whcih should not occur ever on a normally operating megasquirt installation. Quote Link to comment Share on other sites More sharing options...
HeatRaveR Posted September 9, 2008 Author Share Posted September 9, 2008 If resets are happening, what are the symptoms? Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted September 9, 2008 Share Posted September 9, 2008 If resets are happening, what are the symptoms? The fueling can suddenly go rich or lean. Also, they'll show up in a data log, and MegaTune will beep when it's connected and a reset happens. Quote Link to comment Share on other sites More sharing options...
HeatRaveR Posted September 10, 2008 Author Share Posted September 10, 2008 The fueling can suddenly go rich or lean. Also, they'll show up in a data log, and MegaTune will beep when it's connected and a reset happens. Hm, I'm not sure if that's really happening (especially considering my cranking problem is the more immediate concern). Since this Barometric Correction is sort of a just-in-case/band-aid feature, is there any ill-effect to having it active even if it's not resetting? Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted September 10, 2008 Share Posted September 10, 2008 The *limits* are a band-aid, the correction is not. If you are not having reset issues I'd leave it on. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.