small pulse adjust - 60Lb deka

[fezz57]

currently running 60lb Seimens deka,

have both min and default pulse width at about .8

and have a linear scale on the small pulse adjust from -0.14 to 0. 04 top to bottom.

it idles good but runs rich on deceleration (12:1)

the injector base pulse width has a minimum value of 0.595 as loged.

any ideas

[fezz57]

sorry, my mistake, this is what i have in my small pulse adjust.



-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.151975
-0.136778
-0.121580
-0.121580
-0.091185
-0.060790
-0.015198
0.015198
0.030395
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593
0.045593


these are just a guess


my VE cant seem to correct the light throttle tuning enough.

still running too rich

[5.7ute]

What is your IBPW1 & IBPW2 during decel conditions? There is a cax file I made that is used to lower another minimum pulsewidth limit that may be active. Can you post a tune & log file with IBPW & your wideband AFR etc?

[fezz57]

looking at the data page in the scan, it went down to 0.6 somehere?????

at idle it sits around 1.8 i think,

i should have the right PID's to see this info

[5.7ute]

The minimum transient pulsewidth table {B9021} is what is causing your issue. With the setting in your tune 1.398216ms + Injector voltage offset 0.5+ ms will give you an absolute minimum pulsewidth of over 1.8ms. The 0.6ms IBPW is an anomoly.(More than likely DFCO being active)
I have attached a .cax file that you need to unzip into your C:/program files/efilive/V7.5/calibrations folder.
Then search for B9021 which is in the fuel/injectors parameters & set this to a lower value than B4003.
You may need to raise the lower map values again to ensure you havent lowered the VE table too much in these regions due to this limit being hit during AutoVE.

[fezz57]

thanks

i will give it a go

let you's know

[fezz57]

had some good results,

although its made the VE table a liitle odd in the lower MAP around 3K

its OK though

how can we reference what area in the small pulse to adjust this out.

heres the tune and log

[5.7ute]

You are not filtering out the transient conditions, hence the weird VE table at low map. When doing AutoVE I find it better to completely remove the foot from the loud pedal during decel. This lets a simple TP less than 1% filter keep the transient fuelling out.
To reference the small pulse table check out my thread here http://forum.efilive.com/showthread.php?t=10179&highlight=IBPW

[Frost]

The minimum transient pulsewidth table {B9021} is what is causing your issue. With the setting in your tune 1.398216ms + Injector voltage offset 0.5+ ms will give you an absolute minimum pulsewidth of over 1.8ms. The 0.6ms IBPW is an anomoly.(More than likely DFCO being active)
I have attached a .cax file that you need to unzip into your C:/program files/efilive/V7.5/calibrations folder.
Then search for B9021 which is in the fuel/injectors parameters & set this to a lower value than B4003.
You may need to raise the lower map values again to ensure you havent lowered the VE table too much in these regions due to this limit being hit during AutoVE.


Are these transient tables the same that are added in the CAX section sticky that were merged with the Lean Cruise Enable?

Also, I'm not sure, but the transient minimum that you mentioned, Is that Transient>minimum fuel milligrams in HPT? If so, are the the Min RPM and MAX TPS% that define transient fueling enable/disable ? Or am I way off and you are talking Injector Minimum Pulse equivalent?

[5.7ute]

Are these transient tables the same that are added in the CAX section sticky that were merged with the Lean Cruise Enable?

Also, I'm not sure, but the transient minimum that you mentioned, Is that Transient>minimum fuel milligrams in HPT? If so, are the the Min RPM and MAX TPS% that define transient fueling enable/disable ? Or am I way off and you are talking Injector Minimum Pulse equivalent?

It appears that what I made as B9021 is the same address as HPT for the Transient/minimum fuel milligrams. I have tested my scaling & units & have found them to be accurate.(on a couple of platforms) Whether HPT use another calculation from IFR to define this table IDK.
I havent tested the steady state parameters & there influence on this table at this stage. But it does appear to be an absolute minimum PW with no referral to the default PW table. Hence the need to set it lower than B4003 if you want the default PW table active.
Joe was going to add the tables to the .cax sticky but I am not sure if he has yet.

[joecar]

Was this the one for 12212156:



[B9021]
; Description
; ---------------------------------------------------------------------------------------------------------------------------------
DESC.001 = Minimum injector pulsewidth during transient throttle/airflow conditions.
;
;
; Seg Caption Major Minor Vis Dis 2D Grp
; --- ------------------------------------ ---------------------------- ---------------- --- --- -- ---
VIEW = 2 "Transient Minimum Pulsewidth" "Fuel" "Injectors" 1 1 0 1
;
; Address(es) BitOff Bits Typ Inv
; -------------------------------- ------ ---- --- ---
ADDR = B632 0 16 SNM 0
;
; Units Factor Offset Prec MinLimit MaxLimit MinUser MaxUser
; -------- -------------- ------ ---- -------- -------- -------- --------
SI_SLOT = ms 0.015198 0 6 0.0001 4 0.0001 4
;
; Body Col Row
; -------------- -------------- --------------
ULABELS = . . .
;
; Enumerations
; -------------------------------------------------------------------
SI_ENUM = .
IM_ENUM = .
;
; Units Labels
; ---------------- -----------------------------------------------------
SI_COL = .
IM_COL = .
SI_ROW = .
IM_COL = .
;
; ================================================== =============================

[joecar]

I have been a bit busy and may have forgotten... :doh2:

How do you want me to do, do you want me to merge into the existing cax files... i.e. to end up with a comprehsive cax file (including also LC, TF)...?

What do we do about the TF parameters that are now pre-defined in some of the OS's... i.e. do we leave them in there as duplicate table id's...?

I only seem to have B9021 for 12212156 ans 12202088... do you have it for other OS's...?

[5.7ute]

12225074 has the same address for B9021 as 12212156 . So the cax you posted is fine for that OS as well as the 012900x COS.
I havent had any requests for any of the other ls1 OS so I havent gone searching for any other .bin files.
It may be worth just adding them to the existing files Joe. There was one parameter MICK made that mirrored the HPT method at this address. But I am not sure if that is in that main zip file in the cax section or not. Might be worth checking.
Cheers
The other Mick

[joecar]

Ok, 12225074 has it at same address as 12212156... ok, give me a couple of days.

[mr.prick]

Cool Mick. :cheers:
I added this to the 12212156.cax
Will this help reduce the rich AFR readings ramping out of PE? :lookaround:

[5.7ute]

Cool Mick. :cheers:
I added this to the 12212156.cax
Will this help reduce the rich AFR readings ramping out of PE? :lookaround:

No.:grin:

Next in line for testing is the steady state activation. Then I can move onto the transient stuff again.

[fezz57]

have to thank 5.7ute for the new cax. file i added.

this has help me a great deal

Cheers

[5.7ute]

No problems fezz57. Glad I/we could help.
Where abouts in OZ are you situated?

[fezz57]

Sydney we are

cheers