hey guys i just got my car running last night its a itb 13:1 compression lsvtec. it starts with the map in the car, and when i first start it, my plx wideband reads right around 14.7:1. so i let it idle and after about 20 seconds it starts going leaner and leaner and leaner till i have to shut it off. i added a bunch of fuel in the low speed fuel table, with no changes to the gauge. so i added 10 psi fuel pressure and the exact same thing happened again. right now the cars open header and the o2 is mounted probably 6 inches from the end of the header is it possible air is coming in the tailpipe and throwing off the reading? this is my first major buildup and first time with a standalone. any help would be greatly appreciated. thanks in advance

Shaun

heres the buildup of the car is your interested
https://honda-tech.com/zerothread?id=1364932

 

Reversion/dilution is probably affecting your O2 readings. On a full throttle pass on the dyno, open header O2 readings can be inaccurate up to about 3,000 rpm. After that rpm the A/F readings tend to be more reliable.

 

the reason its reading 14.7 for the first 20 seconds is because the wideband is heating up...thats nto an accurate number...the wideband will read that until its hot and then read correctly....If your using the software that came witht he s300 it needs to updated...they released a **** program with it and that was the first major problem...

what size injectors are you running? update the software and then add to the overall fuel trim till it gets right

pm me if you need help as you cant expect it from hondata

 

thanks guys for the quick replies anyone else have any issues like this ever

 

go to option on the top and check realtime update..
that will help with the adding fuel and not getting any results..
seth

 

he was using the crappy software they released it with....

 

yeah i figured it out thanks for the help