Hondata

Hi everyone, first post on the forums. I recently picked up a flashpro for my CSX Type S and been experimenting with different calibrations and analyzing datalogs. I am very new to the whole tuning world and still trying to wrap my head around all the data. I found a calibration done by Eficu on these forums for another member as it was the closest to my current mods. So far on the datalogs, there is no Knock and the AFR, s. trim and l. trims looks ok to me? I could be wrong.. Car feels a lot better to drive with this calibration compared to stock.

Current mods are very modest...
-T1R intake
-Megan racing Test Pipe
-J's 60rs axle back. (stock CSX midpipe)

The car had a couple codes (p0139 and P0171) before the flashpro and the fuel economy dropped. Since disabling the secondary O2 sensor, the codes have not returned but the fuel mileage still seems pretty poor. I am getting around 15-16L/100km mostly city driving.

Is there anywhere in the datalog that would indicate why the fuel economy is so poor? If someone could take a look at the logs to see if the car is running safely with this calibration or make any changes that would be great...I'm still learning about the fuel tables but not comfortable enough to mess with them yet. Any input is much appreciated! Thanks in advance.

Welcome to the forum,

Overall the car is running lean. The fuel tables need to be adjusted. I would refrain from driving the car too hard until you get it dialed in.

- Ed

Hi Ed,

Thanks for taking the time to look over the datalog. I won't drive the car hard until everything is looking ok. It's my daily to and from work so there's not much time or space to do a pull anyways haha.

If the engine is running lean overall, even in part throttle, shouldn't that mean that it would be consuming less fuel, thus better fuel economy? If the fuel tables where adjusted to increase fueling, my fuel economy would be worse.

Perhaps there could be a leak in the exhaust and the O2 sensor is sending a lean mixture signal..maybe the ECU is dumping more fuel to compensate? Could that be the case?

It’s possible it could have an exhaust leak. The o2 sensors are what’s keeping the fuel in line right now. It’s adding more fuel but to make sure it’s hitting the correct AFR.
The ecu only dumps fuel aimlessly when it has a fault code in an effort to save the engine.

It’s possible the calibration needs to be looked over in detail. Once that is done I’m sure it will run a lot better.

-Ed

Tried to edit the fuel tables a few times for part throttle with what I've read up on so far.. not sure if it made any positive changes. Ed, if you are able to take another look at the latest calibration and datalog I have to see if it's ok for normal driving that would be great. I pretty much never drive at WOT so just looking for a tune that safe enough to get me by in the mean time while maybe getting to vtec once in a while.

If you're able to provide any changes to the calibration to get it running ok for me that would be very much appreciated!

Patato.FD5S wrote: Thu Dec 07, 2023 10:03 pm Tried to edit the fuel tables a few times for part throttle with what I've read up on so far.. not sure if it made any positive changes. Ed, if you are able to take another look at the latest calibration and datalog I have to see if it's ok for normal driving that would be great. I pretty much never drive at WOT so just looking for a tune that safe enough to get me by in the mean time while maybe getting to vtec once in a while.

If you're able to provide any changes to the calibration to get it running ok for me that would be very much appreciated!

I will take a look at it when I have some downtime.

-Ed

Absolutely. Thanks for all the work you do for other members on here on your own time.

The calibration is running a little lean but not bad. The fuel trims are around 5%. I personally like to shoot for -5% so there is more fuel on the table. I rather the ecu remove than add fuel.

-Ed