VE and BLM cell edges

[rrauscher at nni.com]

It is the idle cell. Some ecm's do it differently, the one
talked about here uses cell 4 whenever it thinks it is in idle.

If the car is not moving, must be at idle. Or so the ecm thinks.
The ecm will then lock into the idle cell. This prevents the
cell to use from changing due to map fluctuations. Same deal
with the closed throttle SA table. Prevents things from moving
around too much.

On a heavily cammed engine, it can be a good idea to change
which cell the ecm uses for the idle cell. Otherwise the cell
to use can 'jump' the instant the car starts to move.

BobR.


>I don't want to sound like a moderator, but the first question that i had
>was why would it lock in this block?  Could this be an OR situation?  what

>is the purpose of locking it into a cell?  if this is some kind of safety
>or Limp home mechanism then maybe there are multiple situations that this
>could occur.  it appears that you both had different situations but the
>same result.  
>
>why lock in a cell & why cell 4.  this the cell that is used the most
>(common cruising/driving), or ?????  
>
>thoughts?
>BW
>
>
>
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