momentary lean dip at small throttle changes
Posted: Mon Mar 28, 2016 5:03 pm
hello everyone,
i get a momentary lean condition while increasing throttle position.
example lets say i'm cruising at 500mbar at 14.5afr @ 10% tps,
when i give it +-20-50%tps it goes to lets say 800mbar and the afrs gets to 16.0-16.5 for a second, and after that second it goes back to the afr's i tuned it to,(14.0 afr)
i tried increasing tip in up to 55% (but it didnt help the lean spot, just made it richer for a second at WOT,
when i give it full throttle i dont get this lean dip,
what could it be?
i also noticed that while cruising at very low throttle position (1%-2%-3%) afrs gets rich 13.5-13.8afr and it seems that what ever i take off the maps wond help this rich spot,
setup is:
s300v3
id1000 at 43psi no vac
gm 3 bar,
stock throttle size.
i attached the map now but i will have a datalog in a few days, (my wideband offset is too high and i need to sort it out)
i get a momentary lean condition while increasing throttle position.
example lets say i'm cruising at 500mbar at 14.5afr @ 10% tps,
when i give it +-20-50%tps it goes to lets say 800mbar and the afrs gets to 16.0-16.5 for a second, and after that second it goes back to the afr's i tuned it to,(14.0 afr)
i tried increasing tip in up to 55% (but it didnt help the lean spot, just made it richer for a second at WOT,
when i give it full throttle i dont get this lean dip,
what could it be?
i also noticed that while cruising at very low throttle position (1%-2%-3%) afrs gets rich 13.5-13.8afr and it seems that what ever i take off the maps wond help this rich spot,
setup is:
s300v3
id1000 at 43psi no vac
gm 3 bar,
stock throttle size.
i attached the map now but i will have a datalog in a few days, (my wideband offset is too high and i need to sort it out)