Which ROM are you using for V5? It should be under the fuel section called "Airflow/Hz Baro and Air Temp Compensation".

 

when the temperature is hot the ecu is reduceing the timing advance and richen up the fuel with multiplier value in the fuel-timing trim vs air temp table ?

 

Does anyone have these tables defined for 90550001? Thanks!

Dan

 

Maybe I'm looking in the wrong place - but I'm having an issue with Open Loop cruise AFR's drifting a from 15.3 to 17 over time.

Is this table still valid in V7, or is it named something else...maybe "air density compensation for load and ipw"??

I cannot adjust the "air density compensation for load and ipw" table in V7 as any changes revert the cell to "0000"

Am I looking in the wrong place?

 

for 90550001:



<scaling name="CF128" units="Correction Factor" toexpr="x/128" frexpr="x*128" format="%.3f" min="0" max="2" inc="0.0078125" storagetype="uint8" endian="big"/>


<scaling name="TEMP" units="*C" toexpr="x-40" frexpr="x+40" format="%.0f" min="-40" max="115" inc="1" storagetype="uint16" endian="big"/>

<table name="Intake Air Temp Fuel Correction" address="38DC" category="Closed-Loop Control" type="2D" scaling="CF128">
<table name="Intake Air Temp" address="5194" type="Y Axis" elements="8" scaling="TEMP"/></table>

 

Would anyone have one for 88590715?

 

for 88590015

<table name="Intake Air Temp Fuel Correction" address="30FE" category="Closed-Loop Control" type="2D" scaling="CF128">
<table name="Intake Air Temp" address="714A" type="Y Axis" elements="8" scaling="TEMP"/>
</table>

 

Thank you!!

 

Would this table help cruising AFR's in Open Loop mode?

I have open loop cruising enabled and I'm seeing 0.7 - 1.0 shifts in cruising AFR's after cruising for awhile some time, car starts at 14.9, but ends up at 16.1 by the end of my normal day.

 

I include it in the Closed-Loop Control group, but it is also valid for open loop operation.

 

Thank you!

Think it could resolve my problem above?

 

I am having similar issues as you are with the "air density compensation for load and ipw" table. I can edit the scale to allow me to edit the table but it seems this table should be left alone from all that I've read. Not sure of which table is the best to edit to help me address my root problem, which is that I'm leaning out when the temp drops.

 

^ I am assuming your leaning out during WOT? If so what's your method of boost control?

 

Yessir. I'm using manual boost controller. On tephra 7 maf.

 

With the colder weather have you turned down the boost controller any? You could possibly be higher loads in the upper rpm range that you were not before and your fuel table may not be setup to anticipate this. Turn your mbc down a touch and you'll more than likely see your afr's fall back in line.


I tuned my car to run load based boost control, and to run the same load curve in the winter that I do during the summer it equates to 1.5 to 2.5 psi less during the winter where I live (depending on temperature).