Custom os tuning questions

[cyipher]

Also is there a delay for SOL to enable?

[joecar]

so whats the difference in SOL and CL with LTFT disabled then?

CL with LTFT disabled = Closed Loop with no trims.

SOL = Open Loop with STFT on stoich cells in B3647/B3649.

[joecar]

so whats the difference in SOL and CL with LTFT disabled then?

CL with LTFT disabled = Closed Loop with no trims.

SOL = Open Loop with STFT on stoich cells in B3647/B3649.

The implications of this are as follows:

CL with LTFT disabled:
- this is still CL mode,
- LTFT trimming has been disabled,
- STFT trimming has been disabled (either explicitly via B4206, or implicitly via LTFT trimming being disabled, depending on COS),
- OLFA tables B3647/B3649 are not active (because we're in CL mode),
- when you enter PE mode, the PE table B3618 is the only active fuel table;

SOL:
- this is OL mode,
- STFT trimming is enabled on stoich cells of B3647/B3649,
- OLFA tables B3647/B3649 are active (because we're in OL mode),
- when you enter PE mode, the active tables are B3618 and B3647/B3649, so commanded fuel is the richest of the current cell in those tables;

[joecar]

Note: for those COS's that have B4206, SOL may still function even when B4206 is disabled, you have to check this (by viewing what the wideband shows).

[picnic_george]

I R CONFUZED. If the o2 is correcting fuel, then it's the same thing isn't it? LTFT disabled and zerod, there will be no overall fuel correction, other than the o2s pulling the a/f mixture to stoich. Correct? Isn't that exactly what STFT enabled, LTFT disabled is doing too?

[picnic_george]

Is it just because that's the way the COS is? It would seem that disabling the LTFT on a non-COS would yield the same results. Am I correct? Is the wording what changes? I think that's where the confusion is, maybe lol

[joecar]

I R CONFUZED. If the o2 is correcting fuel, then it's the same thing isn't it? LTFT disabled and zerod, there will be no overall fuel correction, other than the o2s pulling the a/f mixture to stoich. Correct? Isn't that exactly what STFT enabled, LTFT disabled is doing too?

SOL does the same as B4206=enabled, but SOL is regardless of B4206 (some of the COS's don't have B4206).

[joecar]

Is it just because that's the way the COS is? It would seem that disabling the LTFT on a non-COS would yield the same results. Am I correct? Is the wording what changes? I think that's where the confusion is, maybe lol

Yes, SOL is a feature of the COS's...

SOL is enabled purely by B3647/B3649 cells being stoich, regardless of B4206 (for the COS's that have B4206).