Tunerpro rt not changing fuel map ?

v8killer · Post by **v8killer** » Mon Apr 27, 2009 6:09 am

hey guys i have this problem with my fuel map not changing, i can change the actual numbers but when i hit upload it will not change the engine tone or the afr on my wideband ? i can however change everything else like inj size rev limit and timing........ i'm at a loss also i do change it in every fuel map !

Post by **dex** » Mon Apr 27, 2009 8:39 am

Is there more than one fuel map and therefore the one you are changing is not being used by the ecu?

v8killer · Post by **v8killer** » Mon Apr 27, 2009 10:54 am

it has 4 fuel maps and i copy and paste each one, still no change ! !

Post by **dex** » Mon Apr 27, 2009 11:50 am

Ok, so two things come to mind; are you in closed loop or are there other maps that you have not got access to?

v8killer · Post by **v8killer** » Mon Apr 27, 2009 12:33 pm

well it will be in closed loop because the o2 is cycling were i tried to change the idle afr to lean it out but it stays right on 14.7-14.8 ! and the 4 maps are the only ones i know of ?

Post by **Mangus** » Mon Apr 27, 2009 1:23 pm

What vehicle? If it's in closed loop, changing the fuel map may not affect anything, as the ECM will trim out your change.

Change something more "noticeable" such as the idle speed map. See what happens with that.

Post by **dex** » Mon Apr 27, 2009 11:59 pm

If it is in closed loop fuelling then the ecu will typically not use fuel maps and will target stoichiometric.