How does temp effeect c.l.s.d?

[smslyguy]

I have been running c.l.s.d. for a while now and i can't figure this one out.. In warmer temp's say like above 60 degrees my v.e. tables are spot on. When temps dip below say 50- 40 degrees my car starts to run lean.. Is there a setting somewhere that controls I.A.T. blending? LIke b4901-b4902??

It will run in p.e mode at temps above 60 at w.o.t. 12.8, but in temps below this it starts to really lean out to around 13.2 or so.. It Here is a copy of my scan.. It will actually start slightly missing while accelarating.. I'm out of idea's...

[nevinsb]

I think it was A0014 in the COS.

[smslyguy]

any idea's at all??

[joecar]

Yes, nevinsb is saying that to correct this in SD you need to run a COS and edit table A0014.

Without A0014 (only defined in the COS's) you can't correct this when in SD.

[smslyguy]

So is this one of the draw backs from not running a c.o.s.?? Meaning that this is typical when running c.l.s.d. for the vehicle ro run leaner on cooler temps??

[BLK02WS6]

I've never messed with B4901, but I wouldn't think it would help much because at WOT, it is already weighted pretty heavily toward IAT. You could always try it and see if it would help, but in the end, I think your answer is like said above - go to a COS and use A0014...

[smslyguy]

Does a0014 only effect o.l. or both c.l. and open loop??

[joecar]

A0014 only affects OL...

but the PCM is in OL during warm up until CL temperature is reached.

[smslyguy]

On a c.o.s. with the octane scaler set to 100% to use the high octane table, would it revert back to the low octane if knock was detected or not?

[5.7ute]

Is there any positive fuel trims being added when you are at WOT over 60 degrees compared to WOT under 60 degrees?

[smslyguy]

No, none that I am aware of.. is that even possible if your fuel trims are negative in c.l. mode?? Meaning wouldn't your fuel trims have to be positive for fuel to be added in c.l.?? My car misses under load like the a.s.r. button is engaged.. like cutting fuel.. according to my wide band it wouldn't appear as though its not running lean enough to causefuel starvation..

[joecar]

On a c.o.s. with the octane scaler set to 100% to use the high octane table, would it revert back to the low octane if knock was detected or not?
Yes, but only if A0000 is disabled... and you have to set A0002 to 100%

( A0000 when enabled forces A0001 as the scaler )
( A0002 limits the scaler upper value )

[joecar]

Yes, only positive trims are added.

[joecar]

Post your tune file.

[smslyguy]

14022 Thanks joecar, here is a copy of my current tune. Let me know what you think..

[smslyguy]

Also i see in c.o.s. they have table b3647 is this just used only in o.l. like the other table b3605??

[joecar]

Yes, B3647 is an improved B3605.

B3647 is used in OL, but with an additional feature: any cells that are stoich will be trimmed to using STFT (this is called semi-open loop), regardless of B4206 (which may or may not exist in all COS's).

[smslyguy]

Any idea's on the tune?

[joecar]

I'll look at it later this morning...

[smslyguy]

Yes, B3647 is an improved B3605.

B3647 is used in OL, but with an additional feature: any cells that are stoich will be trimmed to using STFT (this is called semi-open loop), regardless of B4206 (which may or may not exist in all COS's).

So realistically you can run (with this o.s.) o.L.S.D. and still have the st.f.t for stoich only cells. Correct? So in turn you could have a better fuel economy while running O.L.S.D. with this o.s.

[joecar]

Yes, correct, OL with STFT on stoich cells. Yes it does improve mpg a little.

[joecar]

Any idea's on the tune?


I'll look at it later this morning...

Fix the out-of-range cells:



Out of Range calibration summary: 01:33:10 pm, Wednesday Oct 10, 2012

EFILive Custom Calibrations
{A0002} Octane Scaler Limiter, was out of range when loaded.
{A0009} Boost VE Table, contained one or more out of range values when loaded.


and also A0012, A0013.

More info:

When you upgrade from 12212156 to COS3 or COS5 are you doing this:
- full flash of COS3/5,
- cal only flash from 12212156,
- read back from PCM and save to file,
- edit file and fix any out-of-range cells (including A0012, A0013),
- look thru all tables for sane values and fix the insane ones,
- cal only flash.

Those are important, make sure that all the Axxxx tables and B3647 contain sane values.

OOR: make sure you get rid of the blue dogear corners.



COS5:
showthread.php?t=2599 (http://forum.efilive.com/showthread.php?t=2599)
showthread.php?t=2270 (http://forum.efilive.com/showthread.php?t=2270)

Fixing Out Of Range (OOR) Cells:
showpost.php?p=87052 (http://forum.efilive.com/showpost.php?p=87052&postcount=14) post #14
showthread.php?14119-3000-RPM-max-and-setting-codes-03-Z06-with-Magnuson-at-150kPa (http://forum.efilive.com/showthread.php?14119-3000-RPM-max-and-setting-codes-03-Z06-with-Magnuson-at-150kPa) posts #14, #17
showthread.php?14654-I-need-help-getting-the-most-out-of-my-car (http://forum.efilive.com/showthread.php?14654-I-need-help-getting-the-most-out-of-my-car) post#2

[joecar]

B3609: set to all zero.

B3647: this is not correct... it should slope richer toward the high map columns (not toward the low rpm rows).

B3618: below 3200 and above 4800 could be richer.

C6001: set the MAF DTC's to 1-Trip or to Non-Emissions (not 2-Trips).

[smslyguy]

Fix the out-of-range cells:


and also A0012, A0013.

More info:

Thanks for looking joecar. what does dogear corners, mean? I put all sane values in that was from the orginal load i did with this c.o.s.

[smslyguy]

B3609: set to all zero.

B3647: this is not correct... it should slope richer toward the high map columns (not toward the low rpm rows).

B3618: below 3200 and above 4800 could be richer.

C6001: set the MAF DTC's to 1-Trip or to Non-Emissions (not 2-Trips).

ya, b3647 just loaded what was from my other tune for some reason. It is corrected now. b3618 why would you want it to be richer in below 3200 and above 4800 when it's already commanding 12.8 on the upper r.p.m.s However what would you recomend for below 3200 r.p.m's?

Also what is the main difference between on c6001 1-trip or to non-emissions vrs 2-trips??

[joecar]

Thanks for looking joecar. what does dogear corners, mean? I put all sane values in that was from the orginal load i did with this c.o.s.See the blue "dogear" corners on the cells tha are OOR...

Did you fix the OOR cells (there's a trick to it)...?

[joecar]

ya, b3647 just loaded what was from my other tune for some reason. It is corrected now. b3618 why would you want it to be richer in below 3200 and above 4800 when it's already commanding 12.8 on the upper r.p.m.s However what would you recomend for below 3200 r.p.m's?

Also what is the main difference between on c6001 1-trip or to non-emissions vrs 2-trips??

I think 13.1 (lower rpm) and 12.8 (upper) rpm are on the lean edge of safe... they are ok if you monitor you wideband.



C6001: P0101,2,3 set to 2-Trips means it takes 2 trips to fail the MAF...

i.e. on the first trip the MAF is not failed but being used (no MAF DTC present)...

and if B5001 is not valid (yours is all zero) the PCM computes a MAF value from the VE table.

[smslyguy]

See the blue "dogear" corners on the cells tha are OOR...

Did you fix the OOR cells (there's a trick to it)...?

Sorry, i'm still not getting what you are meaning here? Could you explain a little better?

[smslyguy]

Another side note is at 6400 r.p.m's my fuel injector's are running at 96%. It's not very often i run it that high, but the way it skips like it's cutting off fuel from the injector's under load almost makes me think that one my injector's have failed.. My question is if an injector was bad wouldn't it not work period? This agian is just a guess i'm making.

after adjusting A0014 (I.A.T. ve multiplier) it made no defference as my car cutting out, however it did infact rich'n the mixture down to 12.2 a.f.r.

[joecar]

Sorry, i'm still not getting what you are meaning here? Could you explain a little better?Look closely at A0012 and A0013 (for example)...

the tunetool has colored the 4 corners of each of these cells blue (they look like dogears)...

that means they are OOR.

Post a screenshot of your A0000, A0001, ..., A0012, A0013.

[joecar]

Another side note is at 6400 r.p.m's my fuel injector's are running at 96%. It's not very often i run it that high, but the way it skips like it's cutting off fuel from the injector's under load almost makes me think that one my injector's have failed.. My question is if an injector was bad wouldn't it not work period? This agian is just a guess i'm making.

after adjusting A0014 (I.A.T. ve multiplier) it made no defference as my car cutting out, however it did infact rich'n the mixture down to 12.2 a.f.r.The engine cutting out is a physical problem...

Could get the injectors cleaned.

Also check things like fuel filter/pressure, spark plug wires, crank endplay (too much causes CKP signal to be lost).