Typical general logging:
SAE.VSS
SAE.RPM
SAE.MAF
SAE.MAP
SAE.TP
SAE.IAT
SAE.ECT
SAE.LONGFT1 & 2
GM.HO2S11 & 21
GM.SPARKADV
GM.KR
GM.EQIVRATIO
GM.DYNAIR
CALC.CYLAIR
~Moderator~
Typical general logging:
SAE.VSS
SAE.RPM
SAE.MAF
SAE.MAP
SAE.TP
SAE.IAT
SAE.ECT
SAE.LONGFT1 & 2
GM.HO2S11 & 21
GM.SPARKADV
GM.KR
GM.EQIVRATIO
GM.DYNAIR
CALC.CYLAIR
~Moderator~
For idle tuning you need some other pids, including CALC.RAFIG and RAFPN...
on the PIDs tab, if you go rightclick->More Info on a CALC pid it says what other pids are required to be selected.
~Moderator~
Ahh! Hiding in plain sight. lol
OK, I'll eventually get the hang of this.
I will create a new template and dashboard with the parameters you suggested (and under 25 channels) and capture more logs this weekend.
Thank you again!
Elm
OK-
Here is the latest and greatest.
I did modify the tune prior to this run- I multiplied the entire VE table by 1.2 to accommodate the difference in displacement of an LS1 vs a 409 SBC.
Car didn't surge this time but it still wants to die whenever you flick the throttle unless you feather the throttle back to idle.
The long term fuel trim also took a good 10 minutes of run time before it started displaying data and by the end of the run (16 minutes or so), the LTFT was -18% on both banks.
I hope someone can make some sense out of this.
Thanks,
Elm
Log_1GCCS19W328117273_0004.efi
Last edited by ezobens; January 28th, 2017 at 06:02 PM.
Ok, idle tuning requires the VE and MAF tables to be close.
~Moderator~
Joe,
I don't know what that really means or how I get there?
The VE table is 'air mass per cylinder' and the MAF parameter is 'flow rate vs frequency'.
Apples to kumquats to me?
Please explain what 'close' means in regard to the two and how do I get there?
My apologizes for being so green with all this but I really do want to understand.
Thank you,
Elm
When the VE and MAF tables are close to the engine's actual physical conditions, then fueling/spark will be correct for those conditions, and the idle algorithms have a better chance of controlling idle...
any differences in the throttle body and intake manifold from stock will require editing the idle tables in addition to correcting VE/MAF.
Last edited by joecar; January 29th, 2017 at 04:00 PM.
Let me point you to the Calc.VET procedure in the Gen III section...
start with this procedure (it has links to various reading material), it is the easiest way to get started.
The GM ECM's are quite complex, there are many interdependencies among the tables.
~Moderator~
When I get home to my laptop later tonite, I'll post some reading material url's.
~Moderator~
Thank you so much for your help and patience Joe!
Yes, I probably have my work cut out for me-
The entire configuration is non-stock from the engine to the FIRST TPI intake to the throttle body.
Looks like I'll be doing lots of reading.
Thank you for your time and advice with this.
Elm