Poor Cold Idle (Yes I searched)
Nov 6, 2009, 06:47 PM
#226
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Logic....did you remove the EVAP stuff as well???
Question: Can you dive a little deeper into the "Idle Stability Timing Control" table? I as because on the 94170008 the settings are WAY different from the 9653. Also there is still one section of it that is unknown.
I ask because I am curious if this table can get the car to get to it's idle setting faster, thus curing the 2K rev.
What are your theories on the 2k rev?
Question: Can you dive a little deeper into the "Idle Stability Timing Control" table? I as because on the 94170008 the settings are WAY different from the 9653. Also there is still one section of it that is unknown.
I ask because I am curious if this table can get the car to get to it's idle setting faster, thus curing the 2K rev.
What are your theories on the 2k rev?
Nov 6, 2009, 07:25 PM
#227
The FPR and EGR solenoids and lines, as well as evap canister and related items, are all long gone, with the EGR port plugged at the head. Everything is physically removed.
In my last round of changes (which accompanied getting rid of the 2000 RPM idle), I finally got back around to disabling lean spool (FBA bit 0), completely zeroed out the "Warmup Retard Control" table, copied the open loop load and throttle #1 and #2 tables from 96940011, and made a few final tweaks to "Initial Cranking IPW vs Coolant Temp" to help with cranking.
I'd probably be looking at either the "Warmup Retard Control" (ie. "Percent Low Temp Timing Trim vs. Coolant Temp") or "Open Loop Load/Throttle" tables as good candidates for being the cause of the problem.
In my last round of changes (which accompanied getting rid of the 2000 RPM idle), I finally got back around to disabling lean spool (FBA bit 0), completely zeroed out the "Warmup Retard Control" table, copied the open loop load and throttle #1 and #2 tables from 96940011, and made a few final tweaks to "Initial Cranking IPW vs Coolant Temp" to help with cranking.
I'd probably be looking at either the "Warmup Retard Control" (ie. "Percent Low Temp Timing Trim vs. Coolant Temp") or "Open Loop Load/Throttle" tables as good candidates for being the cause of the problem.
Nov 6, 2009, 07:59 PM
#228
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So my only change tonight is that I made the Open Loop Load 1 & 2 match my original 94170008 rom. Test to come.
As for setting the open loop change over point....I don't seem to have that table. Can someone post the XML for me?
As for setting the open loop change over point....I don't seem to have that table. Can someone post the XML for me?
Nov 6, 2009, 08:24 PM
#229
Here's the definition I have for 96530006:
For the record, I haven't touched these settings (haven't needed it).
PHP Code:
<scaling name="LT Trim Hz" units="Hz" toexpr="x*6.25" frexpr="x/6.25" format="%.2f" min="0" max="1593.75" inc="6.25" storagetype="uint8" endian="big"/>
<table name="Closed Loop - LT Trim Control" category="Fuel" address="35e5" type="2D" level="2" scaling="LT Trim Hz">
<table name="Conditions" type="Static Y Axis" elements="4">
<data>Low -> Mid</data>
<data>Mid -> Low</data>
<data>Mid -> High</data>
<data>High -> Mid</data>
</table>
</table>
Nov 6, 2009, 08:34 PM
#230
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That isn't the one I was speaking of....I am looking for the "Min Temp For Closed Loop" table.
We can use it to make the car never use close loop if we want.
I think this is it....I created this from the 94170015
<table name="Min Coolant Temp for Closed Loop" category="Global Fuel Settings" address="15aa" type="1D" scaling="Temp"/>
It appears to be working in EcuFlash. The temp is 32* F.
We can use it to make the car never use close loop if we want.
I think this is it....I created this from the 94170015
<table name="Min Coolant Temp for Closed Loop" category="Global Fuel Settings" address="15aa" type="1D" scaling="Temp"/>
It appears to be working in EcuFlash. The temp is 32* F.
Nov 6, 2009, 08:37 PM
#231
Here's the definition I have for 96530006:
For the record, I haven't touched these settings (haven't needed it).
PHP Code:
<scaling name="LT Trim Hz" units="Hz" toexpr="x*6.25" frexpr="x/6.25" format="%.2f" min="0" max="1593.75" inc="6.25" storagetype="uint8" endian="big"/>
<table name="Closed Loop - LT Trim Control" category="Fuel" address="35e5" type="2D" level="2" scaling="LT Trim Hz">
<table name="Conditions" type="Static Y Axis" elements="4">
<data>Low -> Mid</data>
<data>Mid -> Low</data>
<data>Mid -> High</data>
<data>High -> Mid</data>
</table>
</table>
Nov 6, 2009, 08:39 PM
#233
That isn't the one I was speaking of....I am looking for the "Min Temp For Closed Loop" table.
We can use it to make the car never use close loop if we want.
I think this is it....I created this from the 94170015
<table name="Min Coolant Temp for Closed Loop" category="Global Fuel Settings" address="15aa" type="1D" scaling="Temp"/>
It appears to be working in EcuFlash. The temp is 32* F.
We can use it to make the car never use close loop if we want.
I think this is it....I created this from the 94170015
<table name="Min Coolant Temp for Closed Loop" category="Global Fuel Settings" address="15aa" type="1D" scaling="Temp"/>
It appears to be working in EcuFlash. The temp is 32* F.
Nov 6, 2009, 08:50 PM
#235
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Woo Hoo....I derived my first piece of XML. I am so proud of myself.
Anyway,
It seems like we all have resolved any cold start & cold drivability issues. The problem now is an annoyance of the RPM climing to 2K after cold start. It does settle after a few seconds.
As I stated earlier about the Idle Stability Timing control......could the sensitivity or possibly the unknown portion of the table affect how quickly the car finds it's base idle settings????
Anyway,
It seems like we all have resolved any cold start & cold drivability issues. The problem now is an annoyance of the RPM climing to 2K after cold start. It does settle after a few seconds.
As I stated earlier about the Idle Stability Timing control......could the sensitivity or possibly the unknown portion of the table affect how quickly the car finds it's base idle settings????
Nov 6, 2009, 09:08 PM
#238
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In 96940011 the Idle Stablilty Timing Control (ISTC) has the following...
Sensitivity = 91 Timing limit = 10 Untested = 94
Where our v7 and the 9417xxxx roms have the following...
Sensitivity = 128 Timing limit = 8 Untested = 8
So now I am very confused as to what these numbers are for. The timing limit is pretty self explanitory....but the others ? ? ?
Sensitivity = 91 Timing limit = 10 Untested = 94
Where our v7 and the 9417xxxx roms have the following...
Sensitivity = 128 Timing limit = 8 Untested = 8
So now I am very confused as to what these numbers are for. The timing limit is pretty self explanitory....but the others ? ? ?
