What steps to tune VE table in speed density mode

[sachem]

I’ll grab a log file while I’m there at the shop. Do I disable closed loop or allow it to enter into closed loop? That’s one of the things that confuses me. So many of the videos and forums say to not allow closed loop. I’ll set up my logger to capture as many of the parameters that I have available to me in the logging program. As I said, I really want to learn this, so whatever you ask, I’ll do. I don’t have a dyno, so I will have to do the best I can “on the road tune”, but at least I’ll know and understand the procedure.

[Pulse_GTO]

I’ll grab a log file while I’m there at the shop. Do I disable closed loop or allow it to enter into closed loop? That’s one of the things that confuses me. So many of the videos and forums say to not allow closed loop. I’ll set up my logger to capture as many of the parameters that I have available to me in the logging program. As I said, I really want to learn this, so whatever you ask, I’ll do. I don’t have a dyno, so I will have to do the best I can “on the road tune”, but at least I’ll know and understand the procedure.

If you don't have a wideband you will need closed loop activated in order to get feedback from the factory narrowband O2 sensors so that they may calculate the fuel trims. If you have a wideband then you want to log your data in open loop as the O2 sensor will be reporting the actual fuel ratio and the error can be calculated from that.

[sachem]

I do have a wideband.

[steveo]

if you have a closed loop flag in your log so we can tell if you're in closed loop or not then leave it on

[sachem]

Just checked, I do have a closed loop flag.

[steveo]

nice! so if you post a log and your current ve table ill make a tutorial for you

[sachem]

Sorry for the late reply, didn't realize there was a second page. I'll get the logs this Monday and post them. Thanks for all your help

[sachem]

nice! so if you post a log and your current ve table ill make a tutorial for you

Looks like it will be a week before I get the log files. The oil pan replacement has some hitches that I am working through.
The engine is apart and I'm waiting on parts and the time to get back to it is holding up progress.
I will send the files ASAP. Thanks for your time and knowldege.

[sachem]

nice! so if you post a log and your current ve table ill make a tutorial for you

Hello Steveo,
just got the car running today, but couldn't get the logger to connect when i was able to drive it in the yard at the shop. So I made a log file idling in my driveway. I don't know if it is enough to give a tutorial or not. If it is not i will send another file when I register the car. I noticed that the wideband readings on the gauge don't match the logger. Is that because the sampling speeds are different between the two, or is my formula in the logging program incorrect? The program won't allow me to attach a cscv file.How do i get it to you