Got a new lap top and tossed the old one which had megasquirt and MLV installed on it. Before the switch I copied all of the megasquirt files over to the new laptop because some were modified for my setup so I didn't want to have to go back through all the steps of configuring megasquirt for no AFM, wideband o2, etc.

But, there's one thing that didn't carry over - in Mega Log Viewer it cannot display MAP pressure, or boost-vaccuum - it says that to do so it requires a user-defined value for the formula: engine off MAP pressure in KPA.

What value do I put here? I can't remember what I did or where I foudn the answer years ago when I set MLV up...

Thanks

 

I've been thinking about this and shouldn't the value for this be 100 kpa? Isn't that atmospheric pressure?
Engine off means no vaccuum - so atmospheric pressure makes sense... someone confirm that this is right though please.

 

*Nearly* 100kpa. It depends mostly on your elevation.

The basic setup for my MS2 is that it reads the pressure at startup and defines it as 100. We use to say it's 100kpa, but in fact it's 100% of the atmospheric pressure at startup.

Maybe MLV asks you for this value because DIYPNP does not handle it the same way?

 

Get in your car, fire up tunerstudio, turn the key to run and look at the map value.

That is the value you want to use.