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Can someone tell how to (or even if we can) access the deceleration ignition tables in EcuEdit? I tried looking but didn't see them. There are a couple of ??unknown tables... I wonder if on of these is it? Cheers, JC

I didn't think it was "up to" ecuedit to define the deceleration ignition tables. If you want stuff like that mapped, you'll need to edit the XML definition file to account for the things you want in that ROM location.

Ahhh, I see then. Thanks. Now, to figure how in the heck to do that... This XML stuff is totally new to me. So, how would I go about modifying the XML definition file to include the deceleration ignition table in the rom image?

Would the Ignitition Acceleration Compensation A - #81 - 29B3D be the table I am looking for perhaps? If so, that sucks because one of the axis is undefined.

thejean wrote:Would the Ignitition Acceleration Compensation A - #81 - 29B3D be the table I am looking for perhaps? If so, that sucks because one of the axis is undefined.

i believe that this table will alter ignition timing depending on the rate of change of vehicle speed. not sure though.

ken

Thats what I figured Ken. Care to work with me on figuring out the scaling for these tables? The tables I need are ignition timing and fuelling on overrun. Cobb has confirmed that they are in there and are used but I don't which tables theya re because the numbers the ECU spit out without scaling make no sense to me.

EDIT: Related thread... http://forums.openecu.org/viewtopic.php?t=957

actually, i changed my mind... it's probably ignition correction based on delta rpm, which is more pertinant.

i just changed mine and will keep an eye out in the logs to see if it has an effect on timing numbers.

i am also on the hunt for where exactly the ecu gets timing numbers for idle. it doesn't seem to get them from the main ign table.

not only just literally at idle rpm, but also, any time the tps is in the "idle" range, regardless of rpm, it pulls a timing number from SOMEWHERE, but i don't know where. it's around 11-14* in my case.

i'm afraid at this point we are getting really into the nitty gritty and poring over the hex is the only way to go about it. that is unless someone with protuner can make a change and compare maps for us...

ride5000 wrote:i am also on the hunt for where exactly the ecu gets timing numbers for idle. it doesn't seem to get them from the main ign table.

When you use ecuedit for editing you will find an idle ignition map. Its a 2x2 map with min/max rpm and timing figures.

ride5000 wrote:that is unless someone with protuner can make a change and compare maps for us...

You read my mind...

But, not all tables are available in protuner. We need someone with access to E***K to do this for us. Takers, PM me.

Assuming the X axis is load and the Y axis is RPM, does this look like it could be a decel timing table?

could be.

it looks like there may be a corresponding dynamic advance table to go along with that one.

These sort of questions are very ECU specific. Post a link to your ROM and I can try to take a look. I'm far more familiar with the DBW ECU, though.

Freon wrote:These sort of questions are very ECU specific. Post a link to your ROM and I can try to take a look. I'm far more familiar with the DBW ECU, though.

Here you go. Thanks, JC

thejean wrote:Assuming the X axis is load and the Y axis is RPM, does this look like it could be a decel timing table?

That was actually some math I applied to a CPC duty cycle table so I don't think it has anything to do with decel ign timing.

ride5000 wrote:i am also on the hunt for where exactly the ecu gets timing numbers for idle. it doesn't seem to get them from the main ign table.

not only just literally at idle rpm, but also, any time the tps is in the "idle" range, regardless of rpm, it pulls a timing number from SOMEWHERE, but i don't know where. it's around 11-14* in my case.

In my XML def, it pulls up a idle ign map and a throttle into idle map and a throttle out of idle map. JC

ride5000 wrote:actually, i changed my mind... it's probably ignition correction based on delta rpm, which is more pertinant.

i just changed mine and will keep an eye out in the logs to see if it has an effect on timing numbers.

Ken, anything to report back on this? JC