Been having a couple issues with idle changing af alot mostly leaning out in Hondata S300. i dont mess with ect or iat corrections. I changed injector voltage compensation tables and no help. it will sit at 14.7 perfect at idle then after some time lean out to 15.5 to 15.8 sometimes.

Also i took this log today and added 3% then clicked ctrl+L and still said 3% off. it never changed and yes real time update is selected.

Having issues and have 2 cars to get to a race this Sunday. any help appreciated.

Car is a crx, PLX M300TE wideband on D10, b16 swap crower stage 2 1/4 cams valvetrain, victor x im, 6xmm throttle body. putting pump and injectors in this week. (pump maxed in log will attach if someone tells me how).

Do have logs and file but manage attachments will not allow me to post them.

 

Look at your logs and see what the ect and iat temps are when it starts to lean out.

 

they are ect 175 and iat 90 at idle.

 

the ecu is adding fuel until it hits 177 this is when you need to set the idle at 14.7

 

thats informational but i have set af between 180 - 195 and still leans out and im also talking the whole map. I will drive it and have the AF set 14.7 pt and change a few cells and then 15's and 16's and its not my math. 2d map is nice curves and no crossing on the low cam (havent done much to high cam). then thats what leads me to the percent change issue. if i add 3 percent it will still want 3 percent and real time is on. wasnt there a way to go fro 4 cell blocking to 1 cell blocking? i cant seem to figure to set it back to 1 cell.

 

I can assure you the "problem" isnt hondata s300.

Are you running in open loop or closed loop?

Have you monitored the vehicles other then idle a/f?
Meaning drive the car & make a pass, then do it again later. If the air temps & coolant temps are the same, the a/f ratios should be similar.

 

apparently you didnt read this part!
Of coarse im in open loop. and plenty of street driving. it seems to lean out and its not over run its under load? I also have this posted on hondatas forum and am hoping for more help there aswell. any one else have this issue? and if i hot key Control+J it brings up the adjustments and i add x amount of percent and it doesnt ritchin sometimes.

 

Apparently I didn't. Your explanation of the issue wasn't 100% clear to me.
I just looked at your calibration on the hondata forums. Look at your tune in 2d, your cells shouldn't intersect like they are.

Stop using auto tune/target lamda. Use datalogging/playback methods, cell tracing & your brain.
If you didn't know: Just because x cells read lean at a specific load & rpm doesn't mean you only adjust x cells.

Also I noticed the Battery voltage between the two logs you posted are different, one appeared to be at 13.x the other was at 14.x

You are going to want to monitor the variances in fuel pressure & battery voltage between runs to determine if there are any issues with fuel pressure or voltage.
I have a feeling your issue is related to battery voltage/fuel pump issues etc.