Wiring up the MJLJ in my Zetec, Part 2

[Hamiltonguitars]

I got my laptop to talk with the MJLJ, I feel warm and fuzzy all over (somebody hug me).

Questions:
When entering the ignition map data do you enter from low to high or high to low (for the Map bins) or does it matter?

Does anyone have any thoughts for baseline input for the MAP sensor?

Thanks,
Rod

[MartinM]

The normal way of having a map is:
- rpm bins increase left to right (ie rpm increases left to right)
- MAP bins increase in value top to bottom (ie pressure increases top to bottom, or vacuum increases bottom to top)

Then the bottom left advance bin will contain the lowest advance value and:
- advance increases left to right (ie advance increases as rpm increase)
- advance increases bottom to top (ie advance increases as vacuum increases)

For a more sophisticated map, the top left corner of the advance bins might not follow this general trend if you're trying something fancy to control low speed idle by having three closely spaced low rpm bins (eg 800, 900 and 1000 rpm) and a set of advance values at high vacuum/low pressue to encourage the engine to idle at the middle rpm bin value

If I was starting out from new for a n/a engine, I'd use MAP bin values in the order of 20-30 minimum and 110-120 maximum with equal spacing between - but then use the runtime display in the configurator to get an indication of the real min and max values being achieved

[Hamiltonguitars]

Thanks Martin, that wil get me going.
Rod H