somewhere i thought i read the AE/tps/map may affect my BLM or INT(which affects BLM). how can this be? i was of opinion AE invokes open loop operation and therefore has no affect on BLM. same with PE; involkes open loop so the 02 sensor is functional but the data is ignored. i do see my 02 volts affected when AE is engaged in winaldl but it shows with some delay as it appears the 02 (downstream=delayed) as AE/TPS is immediate. reason i ask is whether i should only datalog when i do not invoke AE or PE. comments?

 

There are a series of cells that hold the various BL corrections based on MAP, and RPM values. As the RPM/MAP values change you invoke different cells.

Using the BLs for tuning means being in a steady state condition. If your in AE or PE there is nothing meaningful in what the BLs maybe doing.

AE is just a transistional stage.
The PE AFR is based on the VE table, being 14.7:1.

 

Likewise, is DFCO a transitional stage? If so, that may explain why some of my off idle BLMs have been kinda funky up to now.

 

understood.

Q is if AE or PE was invoked during datalogging does it skew my BLM's in that cell where AE came on(or a neighboring cell)? i data log on way to or way home from office(25 miles) and occasionally AE will come on purposely or just accell up to speed entering on xway. i did disable AE/PE once for 3200 and 3600 rpms but was unable to get complete cell results. those with no data i just interpotated from other adjacent cells. bottom line is WOT a/f was 12/1 on wide band so underlying VE was OK.