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Author Topic: AFR Desired vs Actual  (Read 15320 times)
golfputtputt
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« Reply #30 on: August 13, 2019, 07:40:20 AM »

Still in the weeds.
Modifying FKKVS makes the idle hunting dramatically worse, even if i scale FKKVS ms axis to address idle areas. KFKHFM makes it worse as well.

There are too many issues to figure out and i’m just reading the FR randomly, understanding nothing and getting no where.
Car still runs like shit.

Anyone have ideas of what to variables to log?

It seems load, rpm, afr and corrections oscillate in time with eachother and ign timing oscillates inversely. What drives what? I’m not sure whats at the top of the pile here. Like, if rpm was stable would it trickle down and the other variables will straighten out? Where do i begin?
« Last Edit: August 13, 2019, 09:34:00 AM by golfputtputt » Logged
aef
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« Reply #31 on: January 22, 2025, 05:54:57 AM »

Tuning any injectors with known MAF:

1. Set the MAF parameters correctly (or if it's stock, leave as-is).
2. Zero FKKVS and KFLF
3. Set KRKTE to something reasonable
4. Set TVUB to something reasonable.
5. Test
6. TVUB
7. KRKTE
8. FKKVS
9. KFBAKL/KFVAKL

If you have to touch WFRL when is the right moment to do this?
Befor or after FKKVS and why?
« Last Edit: January 22, 2025, 11:56:40 PM by aef » Logged
prj
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« Reply #32 on: January 22, 2025, 05:15:57 PM »

If you have to touch WFRL when is the right moment to do this?
Befor or after KRKTE and why?

After, as the final thing, it's only important on transients, you're tuning steady state.
KFBAKL/KFVAKL = mults for WFRL.
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aef
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« Reply #33 on: January 22, 2025, 11:57:46 PM »

Thank you as always.

I made a typo by asking for "before or after KRKTE" while i wanted to write FKKVS but i guess the answer is the same.
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