Hey guys, I've got a question. I'm running 25psi of boost on my car right now and I'm trying to adjust the afr's on it. During WOT I'm running no knock at all, but my WB is showing 10.0 afr when at full boost. Anything above 22psi and it goes to 10.0. When I was running 22psi before my tune, I was running 11.3 afr's. So I adjusted my fuel map a little bit to get a little more fuel for the higher amount of boost. Now, I've got the fuel maps at 3500rpms+ @ 240-300 load higher (or leaner) than what it was from the factory. Does that sound about right to anyone? I'm running 9.x through out that whole range and it's still 10.0 afr. Any ideas?

Current mods include, HKS 3" TBE, FMIC upgrade, HKS intake, AEM TruBoost EBC, and AEM UEGO WB.

 

1- Check if you do not have any boost leak.
2- Post a log with a screenshot of your maps
Cheers

 

are you changing all fuel maps? under certain situations the ecu refers to a different map and flips back and forth. also the low octane maps will come into play if fuel quality is low. make sure you play with the numbers in the other maps.... or save a copy of your rom. then copy the high octane fuel map onto all other maps. and save that as a seperate file. load it to the ecu and see if it controls afr the way you chose. remember that the values in the ecu aren't absolute. the ecu will change afr based on several criteria on the fly. just cause your map says 10/1 doesnt mean thats what you will run

 

I will try to get a screenshot of my fuel maps here in a bit. I don't have a boost leak, checked that already. She is holding 25-26psi very nicely.

I'm changing both maps. I'm running 93 octane here. I've been leaning it out for a bit now, and I'm now starting to show roughly 10.8 afr's now and my cells for the 240%+ and 3500rpms + are roughly around 10.3-10.5. I know I need to lean it out a little bit more. Not getting any knock still, so everything seems alright, just a little too rich. Let me see if I can get some screenshots of my fuel tables.

 

Make sure to post up your log with the fuel map. It would be nice to see the loads your are hitting in your log.