Can someone take a look of my datalog

[D_Thissen]

How many KM are on the tune?

[D_Thissen]

Originally Posted by Roadcone

that last log, commanded vs actual AFR... thats WAYYYY off.

commanded 12:1
actual 11.25:1

yet lt and st fuel trims are at 0... that makes ZERO sense.

At least he is on the richer side

[sIowbrz]

Originally Posted by D_Thissen

How many KM are on the tune?

I HAD ABOUT 100KM ON THE TUNE

[sIowbrz]

i dont plan to get it tune until i get the header but ill be taking it to the track want to make sure that im not damaging anything haha

[D_Thissen]

1000km is more than enough for the car to 'learn' the new tune. I haven't had a chance to look through your logs, but if your IAM is <1.0 on the street, it more than likely will drop further on the track as your Oil/Coolant Temps rise. You could always give PC94 a shot. I had good luck using that when I was on the Stg.1 93 tune.

[Kodename47]

Originally Posted by Roadcone

commanded 12:1
actual 11.25:1

yet lt and st fuel trims are at 0... that makes ZERO sense.

How does that make no sense?

[sIowbrz]

Originally Posted by D_Thissen

1000km is more than enough for the car to 'learn' the new tune. I haven't had a chance to look through your logs, but if your IAM is <1.0 on the street, it more than likely will drop further on the track as your Oil/Coolant Temps rise. You could always give PC94 a shot. I had good luck using that when I was on the Stg.1 93 tune.

sorry its 100 km not 1000 km lol

[bababooey]

Originally Posted by Roadcone

that last log, commanded vs actual AFR... thats WAYYYY off.

commanded 12:1
actual 11.25:1

yet lt and st fuel trims are at 0... that makes ZERO sense.

apologies if I created confusion concerning who's log that reply was towards. this thread seems to be a little more lower level conversation than the sticky I originally posted that in.

still trying to learn which values are critical for a healthy engine. if the KM question was to me, i had to of put much more than 200 miles on since this reflash. prior to that was another 93 tune that was too agressive so the relearn of ecu from switching fuels isnt a possibility.

[steve99]

Originally Posted by bababooey

apologies if I created confusion concerning who's log that reply was towards. this thread seems to be a little more lower level conversation than the sticky I originally posted that in.

still trying to learn which values are critical for a healthy engine. if the KM question was to me, i had to of put much more than 200 miles on since this reflash. prior to that was another 93 tune that was too agressive so the relearn of ecu from switching fuels isnt a possibility.

couloured link below on ECU logging might help

[steve99]

Originally Posted by Roadcone

that last log, commanded vs actual AFR... thats WAYYYY off.

commanded 12:1
actual 11.25:1

yet lt and st fuel trims are at 0... that makes ZERO sense.

If ltft is low then that usually means the closed loop portion of maf scale is good ie kind of the lower rpm and light throttle portion, section below 3v maf.

if the commanded and actual afr follow each other well in wide open throttle areas means open loop area of maf scale is good ie sextion over 3v maf


in this case it appears the closed loop is ok but the open loop section of maf scale is not correct hence his ltft is low but car runs rich during wide open throttle runs


11.2 is the rich limit of standard 02 sensor scaling so it might be even richer.

fix would be to reduce the values in the open loop area af maf scale be the percent difference in the afr and commanded afr in this case about 8%. Their is a nice maf scaling tool that will do the work for you.

[sIowbrz]

Originally Posted by steve99

If ltft is low then that usually means the closed loop portion of maf scale is good ie kind of the lower rpm and light throttle portion, section below 3v maf.

if the commanded and actual afr follow each other well in wide open throttle areas means open loop area of maf scale is good ie sextion over 3v maf


in this case it appears the closed loop is ok but the open loop section of maf scale is not correct hence his ltft is low but car runs rich during wide open throttle runs


11.2 is the rich limit of standard 02 sensor scaling so it might be even richer.

fix would be to reduce the values in the open loop area af maf scale be the percent difference in the afr and commanded afr in this case about 8%. Their is a nice maf scaling tool that will do the work for you.

I have no idea how to do it would you able to help a noobie out? Haha