Questions on commanded AFR

[LS1_Dragster]

I'm using an 0411 computer with 01270003 OS, I've been tuning in open loop SD mode and now I turned on closed loop by:

B3801 enable
B3802 to 140
B3803 to 257
B4205 to 130 from 50 degrees up

It appears to be working at idle but when I rev it or power brake it the commanded AFR B0101 table does not seem to be in effect anymore. The commaned AFR stays at 14.63 the entire time.

Can I still use B0101 whith the above settings or do I have to change something else? Or can this be used in OLSD only?

Lee

[mr.prick]

Did you set {B3618} to something other that 14.63 or
reduce {B3616}?

[LS1_Dragster]

B3618 all 14.63
B3614 is 64 to 3600 and then 34 for the rest

If I set it to stock values then will B0101 be useless?

Lee

[5.7ute]

No. B0101 is your VE table that the pcm will use exclusively in SD mode. This table has no effect on your commanded AFR.
The PCM will command whatever is the richest out of B3647/B3618 & a few others that wont be relevant here. Can you either post your tune or a pic of these tables.

[mr.prick]

The commaned AFR stays at 14.63 the entire time.


B3618 all 14.63

This is why commanded AFR does not change and will keep actual AFR from changing while in closed loop.

[LS1_Dragster]

I'm so sorry, I said B0101 when I REALLY meant B3647! So let''s start over now.....

How can I use B3647 in CLSD Mode!

Lee

[macca_779]

You cant run Closed Loop Fueling with LTFT's enabled with COS3 or COS5 due to B3647 working in a semi open loop (STFT's only) mode.

Its mentioned in the COS Tutorial.

[LS1_Dragster]

You cant run Closed Loop Fueling with LTFT's enabled with COS3 or COS5 due to B3647 working in a semi open loop (STFT's only) mode.

Its mentioned in the COS Tutorial.

Thank you, I read that several months ago but I'm forgetting more then I learn!

Lee