afr target tables

Spawne32 · Post by **Spawne32** » Fri Apr 08, 2011 8:02 pm

Just wanted to get some suggestions on what my AFR target tables should look like...heres how i have it setup now, couple people i talked to said they dont like the clarity of the table on the vac side because it jumps too much between columns and isnt progressive enough, but i havent found a way to add more vacuum columns without it removing the boost columns.

ckretvix · Post by **ckretvix** » Sat Apr 09, 2011 2:36 pm

Vacuum doesnt need alot of clarity. The engine isnt under alot of load so variation is mostly unnoticeable.

Post by **Bugermass** » Sun Apr 10, 2011 3:31 pm

this is just a lookup table for the AFR overlay logging stuff. It has no effect on engine fueling. This is not a VE based ECU lol..

Spawne32 · Post by **Spawne32** » Sun Apr 10, 2011 4:10 pm

i am quite aware that it is only for reference, however it is important from what i understand when using the tuner auto adjust feature, which i have been using

Post by **Bugermass** » Tue Apr 12, 2011 9:39 pm

its plenty of res for the capabilities of the stock ECU

Spawne32 · Post by **Spawne32** » Tue Apr 12, 2011 9:54 pm

two major problems im having is the tune is varying so much from day to day with different weather, and i havent been able to get the ECT and IAT corrections right, and i have large peaks and drops in the fuel map that i cannot seem to smooth out without going rich or lean in some spots, some areas in the middle of the map need more fuel then all the surrounding cells and vice versa, cant seem to figure out why. Its been suggestion that i may have a reverberation in my exhaust or intake causing that since i ran 2.5\" pipe into a 2.25\" type-r axle back for noise purposes, if thats so im gona have to take that off.

ckretvix · Post by **ckretvix** » Thu Apr 14, 2011 8:01 pm

hmm I drove all year long on a single tune through winter and summer never touching part throttle. AFR's may change a bit, you will never get it perfect, but drivability shouldnt be different

Post by **Bugermass** » Fri Apr 15, 2011 12:33 am

post your tune..

Spawne32 · Post by **Spawne32** » Fri Apr 15, 2011 12:48 am

this is from a few days ago 9400rpms has been helping me out, he gave me a new one to upload with a smoothed map, havent played with it yet.

Post by **Bugermass** » Fri Apr 15, 2011 7:52 pm

The reason your fueling is unstable and inconsistant is because your fuel map is poorly mapped. You need to start over from scratch.. Read some of the other threads on here about tuning fuel and look at some of the posted maps to get an idea of what you need to do. Also you should not be using overall fuel trim %.. The only offset you need to adjust is FV.. Put the exact flow size of your injectors, and adjust FV gradually until your in the ball park in cruising areas of the map. Start with a fresh map and go drive and adjust your FV until your AVG fueling at cruise is mid 14s.. Then start tuning your fuel map from there.