Calc.VET: correcting MAF and calculating VE (in single log)

[tinindian]

You can fail the MAF without un-wiring it (if you don't understand this, then you did not understand the AutoVE tutorial)...

The AutoVE tutorial I have says to unplug the MAF, I understand that completely. I thought I would be able to turn off the MAF as you posted with these settings:

"To fail MAF set both C2901, C2903 to 1 (which I can do) and set C6001 P0101,2,3 to 1-trip (which I can't)".

I have V1 and the only options are MIL & NO MIL. Yes, I am using my 5-pin MAF (no SD).

[joecar]

I guess indirectly it tells you what to do but if it's truly a tutorial why not provide the whole thing for people that don't have serial wideband? Not even sure if this is correct:

*CLC-00-100
factor 0 20 .1 "{CALC.AFR_LC12}/14.7"

*CLC-00-110
factor 0.5 1.5 .4 "{GM.EQIVRATIO}*{CALC.LAMBDA}"

Almost correct...

you will also have to add this line just before the line defining CALC.WO2BEN:

. . .
CALC.LAMBDA               F100 CLC-00-100   factor          Tuning           "Lambda from WB"
CALC.WO2BEN               F110 CLC-00-110   factor          Tuning           "BEN from WB"
. . .

or you could do this instead (did you see this part):

or simply combine those (i.e. same as method 1):
edit CALC.WO2BEN1 (CLC-00-110) to be "{GM.EQIVRATIO}*{CALC.AFR_LC11}/14.7"

that is much simpler (you just edit the last part of CLC-00-110).

I know you're trying to get people to "figure it out" but why make it easy for people w/ serial & hard for people w/ analog?

I would have to provide (and test out) a calc_pids.txt file for each analog wideband...

but, if you got this far you already learnt some of what is needed (like learning how to edit calc pids).

[joecar]

Tuning without learning how to edit calc pids is like driving around in 1st gear not realizing there are N-1 more gears

[tinindian]

Thanks Joe. I feel editing calc pids has more to do with the intricacies of EFILive than actual tuning, but it is what it is I guess.

Ya I had the lambda line in there already. So what PID do I use in place of EXT.WO2LAM1 (isn't this for serial wideband?) if I am to continue on with calc.vet?

Also, if I go the AutoVE route why can't I get the MAF to fail like you wrote: "To fail MAF set both C2901, C2903 to 1 (which I can do) and set C6001 P0101,2,3 to 1-trip (which I can't)".

I have V1 and the only options are MIL & NO MIL. Yes, I am using my 5-pin MAF (no SD).

[joecar]

You replace "{EXT.WO2LAM1)" with "{CALC.AFR_XXX1}/14.7"

where CALC.AFR_XXX1 is the analog AFR pid for your wideband and 14.7 is the assumed stoich AFR of that wideband (some use a slightly different value if stoich so you have to see what their user manual says).

[joecar]

The AutoVE tutorial I have says to unplug the MAF, I understand that completely. I thought I would be able to turn off the MAF as you posted with these settings:

"To fail MAF set both C2901, C2903 to 1 (which I can do) and set C6001 P0101,2,3 to 1-trip (which I can't)".

I have V1 and the only options are MIL & NO MIL. Yes, I am using my 5-pin MAF (no SD).

Your tune file does not contain table C6001...? What PCM and OS do you have...?

You can still get the MAF to fail, but you would have to wait for a MAF DTC to trigger... setting C6001 P0101,2,3 to 1-Trip causes the DTC to trigger immediately rather than on the next trip cycle.

V1 doesn't limit the tables you see... the OS id would (since it would depend on which tables have been "discovered" for that OS).

[joecar]

Also, are you connecting your 5-pin MAF using a 5-pin connector directly, or a 3+2-pin to 5-pin converter...?

[tinindian]

Your tune file does not contain table C6001...? What PCM and OS do you have...?

You can still get the MAF to fail, but you would have to wait for a MAF DTC to trigger... setting C6001 P0101,2,3 to 1-Trip causes the DTC to trigger immediately rather than on the next trip cycle.

V1 doesn't limit the tables you see... the OS id would (since it would depend on which tables have been "discovered" for that OS).

My bad. I was looking at C6002, not C6001. One last question. I set the MAF to fail like you advised but when I loaded the tune and started it up the PID SAE.MAF was still changing. I kind of expected it to stay at zero. How do I know for sure the MAF is turned off?

[tinindian]

Also, are you connecting your 5-pin MAF using a 5-pin connector directly, or a 3+2-pin to 5-pin converter...?

I wired the 5-pin connector directly.

[joecar]

So you do have table C6001...?


When the MAF is failed but still physically present, the PCM still reads it but does not use it if any of the MAF DTC's is triggered.


If any of these DTC's trigger then the MAF is failed (i.e. PCM is using VE exclusively): P0101, P0102, P0103;

if you do not see one of those DTC's as currently triggered, then the PCM is either using the MAF (if physically present), or it is calculating an estimated magical "desired" MAF value (if physically removed).