Injector shut-off map

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Feb 9, 2012 | 09:13 AM

#16

And

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From: Bristol, England

this is the scaling i've set up

Quote:

and the table

Quote:

this shows a value of 475ms does this sound about right?

if the stock value is suppose to be 0x0014 then thats at address 0x1588 as at 0x158a is 0x0013 assuming 16bit numbers?

Last edited by And; Feb 9, 2012 at 12:02 PM.

Feb 9, 2012 | 09:49 PM

#17

acamus

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From: Lattitude 48.38°, Longitude 17.58°, Altitude 146m = Slovakia, for common dude

Quote:

Originally Posted by And

sweet many thanks, you don't know the 9055 one as well do you ?

thanks
Andy

0x158A is not used by code in 9055.

Feb 9, 2012 | 09:51 PM

#18

acamus

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From: Lattitude 48.38°, Longitude 17.58°, Altitude 146m = Slovakia, for common dude

Quote:

Originally Posted by And

this is the scaling i've set up

and the table

this shows a value of 475ms does this sound about right?

if the stock value is suppose to be 0x0014 then thats at address 0x1588 as at 0x158a is 0x0013 assuming 16bit numbers?

there is a hysteresis used by code, so both play role, but I am not sure of the purpose of these setting.

Feb 14, 2012 | 09:31 PM

#19

CDrinkH2O

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And - so did reducing this value reduce the fuel cut delay on 9653XXX6 for you?

Feb 14, 2012 | 11:57 PM

#20

And

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From: Bristol, England

i changed the original value of 475 to 200 although not really been watching the afr as not driven the car much lately, was going to log the TPS and injector pulse to see if the time between the shut off has changed, will try and get done asap, although with Acamus saying it wasn't used in the code kind of put me off too

Andy

Feb 22, 2012 | 12:50 PM

#21

And

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From: Bristol, England

so i did some tests with the modified values but it made no difference

as shown by the graphs below, the first is the standard 500 475 values and 100 75 for the second graph
As you can see from these graphs it takes about 3-4 seconds for the injectors to shut off after throttle lift off

any other ideas?

Last edited by And; Feb 22, 2012 at 03:06 PM.

Feb 22, 2012 | 02:50 PM

#22

CDrinkH2O

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Yep - saw the same effect. IPW is reduced by both sync and async decel subtractions as TPS transitions to full shut, but then there is another final async IPW contribution before the injectors shut off completely. This drives AFRs into the 10s and makes a nice double martini smell (unburned E85

) when I pull up at a junction. Unfortunately I've not found anything yet to stop this pleasant smell. Next step for me is to download IDA Pro 5.2 and brush up my disassem skills on the SH4B.

Perhaps tephra, acamus, mrfred or bez can comment on the location(s) in 96530706 for the decel fuel cut delay subs that control this smelly behaviour? I'm ready to knock myself out on some code to find the answer

Feb 23, 2012 | 11:55 PM

#23

And

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From: Bristol, England

do you want the decel tale locations for 9653? here they are if you do

Code:

	<table name="Decel Fuel Cut Delay #1" category="Global Fuel Settings" address="42ce" type="2D" level="2" scaling="uint8">
		<table name="Load" address="697a" type="Y Axis" elements="7" scaling="Load"/>
	</table>

	<table name="Decel Fuel Cut Delay #2" category="Global Fuel Settings" address="42dc" type="2D" level="2" scaling="uint8">
		<table name="Load" address="697a" type="Y Axis" elements="7" scaling="Load"/>
	</table>

	<table name="Decel Fuel Cut Delay #3" category="Global Fuel Settings" address="42ea" type="2D" level="2" scaling="uint8">
		<table name="Load" address="697a" type="Y Axis" elements="7" scaling="Load"/>
	</table>

	<table name="Decel Fuel Cut Delay #4" category="Global Fuel Settings" address="42f8" type="2D" level="2" scaling="uint8">
		<table name="Load" address="697a" type="Y Axis" elements="7" scaling="Load"/>
	</table>

	<table name="Decel Fuel Cut Retard" category="Global Fuel Settings" address="4312" type="2D" level="2" scaling="Timing">
		<table name="Engine Speed" address="6576" type="X Axis" elements="10" scaling="RPM"/>
	</table>

Feb 24, 2012 | 12:21 AM

#24

CDrinkH2O

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From: San Francisco

Correction

I believe mrfred recently found that these are actually ISCV demand adders that are driven by TPS.....

Code:

	<table name="ISCV Demand TPS Adder - Neutral AC Off" category="ISCV Control" address="42ce" type="2D" level="2" scaling="ISCV_AX2_8">
		<table name="Throttle" address="697a" type="Y Axis" elements="7" scaling="ThrottlePercentage"/>
	</table>

	<table name="ISCV Demand TPS Adder - In Gear A/C Off" category="ISCV Control" address="42dc" type="2D" level="2" scaling="ISCV_AX2_8">
		<table name="Throttle" address="697a" type="Y Axis" elements="7" scaling="ThrottlePercentage"/>
	</table>

	<table name="ISCV Demand TPS Adder - Neutral A/C On" category="ISCV Control" address="42ea" type="2D" level="2" scaling="ISCV_AX2_8">
		<table name="Throttle" address="697a" type="Y Axis" elements="7" scaling="ThrottlePercentage"/>
	</table>

	<table name="ISCV Demand TPS Adder - in Gear A/C On" category="ISCV Control" address="42f8" type="2D" level="2" scaling="ISCV_AX2_8">
		<table name="Load" address="697a" type="Y Axis" elements="7" scaling="Load"/>
	</table>

See https://www.evolutionm.net/forums/ec...ng-clutch.html

I've successfully used them to stop stalling on light load clutch in, (like going up a hill and stopping) and to get my idle stable.

Feb 24, 2012 | 12:51 AM

#25

And

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From: Bristol, England

ah i had read that one before and forgot all about it

so the quest continues .....

Feb 25, 2012 | 09:25 PM

#26

Mattjin

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From: Sydney, Australia

There should be a couple of 2D maps that very the decel cut delay based on the TPS amount you were at before lifting off. It also works together with a 2D ignition retard map. At least these maps were in my 80700010 rom, and I have seen them in numerous others.

Feb 25, 2012 | 10:27 PM

#27

CDrinkH2O

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From: San Francisco

Quote:

Originally Posted by Mattjin

That's encouracging Mattjin. Can you post up the addys and axis locations so I can search for them in 96530706?

Feb 27, 2012 | 02:17 PM

#28

And

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From: Bristol, England

bump for some more suggestions Mattjin are you talking about these maps

9055001

Code:

<table name="Decel Fuel Cut Resume Enrich" category="Fuel" address="3aaa" type="2D" level="2" scaling="EnrichmentAdj">
<table name="Engine Temp" address="5102" type="X Axis" elements="9" scaling="Temp"/>
</table>

<table name="Decel Fuel Cut RPM Offset" category="Fuel" address="37f4" type="2D" level="2" scaling="RPM8">
<table name="Engine Temp" address="50e8" type="X Axis" elements="8" scaling="Temp"/>
</table>

8997010

Code:

<table name="Decel Fuel Cut RPM Offset" category="Fuel" address="37de" type="2D" level="2" scaling="RPM8">
<table name="Engine Temp" address="5fd0" type="X Axis" elements="8" scaling="Temp"/>
</table>

<table name="Decel Fuel Cut Resume Enrich" category="Fuel" address="3a94" type="2D" level="2" scaling="EnrichmentAdj">
<table name="Engine Temp" address="5fea" type="X Axis" elements="9" scaling="Temp"/>
</table>

Last edited by And; Feb 27, 2012 at 02:33 PM.

Feb 29, 2012 | 08:32 PM

#29

CDrinkH2O

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From: San Francisco

And - thanks, that helps mate. I'm using IDA PRO 6.1 to mark up the 96530706 ROM and I can now compare it to 9055001 & 8997010
and run a pattern match search for these same tables. I will post back the xml if I find a match in 9653XXX6.
Can you can test the effect of changing these tablesa nd post back what you find?

Feb 29, 2012 | 09:04 PM

#30

Acree

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From: Dallas

Any chance for the 88590715 rom?

-Acree

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