Rb25 neo runs lean in 4th and 5th gear light load
Posted: Wed Jul 30, 2014 6:29 am
Hello,
I have the car running fairly well at idle and I'm trying to adjust K constant enough to drive it to the dyno after upgrading the turbo and injectors. I am only slowly driving it down the road not going above 2500rpms and it drives fine from 1st to 3rd gear but as soon as in to 4th i start seeing afr close to 16-17 and in 5th gear goes all the way 20.2 and above. Car bogs when it runs this lean. According to the map I'm in the close loop zone. I have disconnected the o2 sensor and set the feedback temp to 200 degrees aswell.
I have changed the fuel filter and played with k and latency but I get the same results in 4th and 5th gear. I have checked base fuel pressure and its solid I have an aem regulator. I've done a boost leak test and it is solid no vacuum leaks.
I am noting that battery voltage fluctuates from 13.5 to 12.9v, I am not sure if this might be causing this?
I've also attached a log file for reference.
Thanks
I have the car running fairly well at idle and I'm trying to adjust K constant enough to drive it to the dyno after upgrading the turbo and injectors. I am only slowly driving it down the road not going above 2500rpms and it drives fine from 1st to 3rd gear but as soon as in to 4th i start seeing afr close to 16-17 and in 5th gear goes all the way 20.2 and above. Car bogs when it runs this lean. According to the map I'm in the close loop zone. I have disconnected the o2 sensor and set the feedback temp to 200 degrees aswell.
I have changed the fuel filter and played with k and latency but I get the same results in 4th and 5th gear. I have checked base fuel pressure and its solid I have an aem regulator. I've done a boost leak test and it is solid no vacuum leaks.
I am noting that battery voltage fluctuates from 13.5 to 12.9v, I am not sure if this might be causing this?
I've also attached a log file for reference.
Thanks