Int bL numbers

[nero]

Is this a normal range (just got my scanmaster)?

Int ranges from 116-141
bL ranges from 122-139

o2 is all over the place... it's being swapped out for a denso unit this weekend!

Are those normal ranges? And, while you're here... what the heck is Int and bL and what are their desired ranges?



thanks!

 

[nero]

oh

Oh, those numbers are on a warmed up engine with normal driving.

 

[pacecarta]

int (integer)and bl (BLM's or block learn cells) ideally should center on 128 and the computer will work towards learning itself to that # , as yours is doing . and those # only matter at idle with engine warm .
depending on airflow and rpm the BL can be in any of 16 cells that store info on what your car needs in regards to more or less fuel to run smooth when not in WOT or power enrichment modes . blm at idle is the one you normally look at since its an indicator of whether you have too much air or too much fuel as a high or low blm will show the computer struggling to adjust (but not winning). dont wory about what BL values you have off idle ,as you accelerate you will see the stored values for the cells as you pass thru them and they will most likely be near 128 depending on your driving habits

o2s will jump around once in closed loop as the computer goes rich then lean to control emmissions ,it shouldnt stay locked on one value except at wot when the computer runs off programmed fuel maps and doesnt use the o2 readings or try to make rich /lean adjustments, when the CC(crosscounts) start getting low or o2 readings stay at one place too long indicating a lazy O2 thats when to yank it .
go to gnttype.com and read up

 

[2QUIK6]

Those BLMs look to be normal, I try to program so that the BLMs are +-10 from 128. I think the minimum is 90 where the computer can no longer control fueling and the high # is I think 150?? anyway, and # higher than 128 means you are running lean and the ecm is adding fuel, lower than 128 means rich and the ecm is removing fuel based on the fueling computations stored for that rpm/load and MAF table reading.
The BLm is long term, the INT is short term.....notice if the INT changes very rapidly either climbing above 128 or decreasing below 128...when this happens, the BLM will adjust by 1 number every few seconds until the INT start to hover around 128.

The O2 reading will bounce all over the place, the ecm takes the avg of those reading to determine the reading and to adjust fueling/BLMs. Crosscounts should cycle from 0-255 in less than 90 seconds, if longer than that, then the O2 is getting lazy and needs replacement. Use only AC Delco or Denso O2s, do not use Bosch as they do not last very long for some reason in TRs has been alot of peoples experience including my own.

 

[nero]

Thanks folks! Very informative, glad to know my TR is nice n healthy!

 

[MistaScott]

You should never be stuck at 128. Ideally, you will see the BLM jumping around, and usually sticking in the low 120s.

And yes, Bosch o2s are crap.