hello boy..
i buy a plx devices wideband with gauge lsu bosch sensor 7057
i start to play with this yesterday night!
the a/f are little lean from 2000 to 4800 rpm..
next a 4800 rpm vtec engaghe and i have a big bug of rich mixture (cam angle 50? inition 32? fuel 2900 about 11.0 af ratio) next the a/f ratio sta little lean (about 13.2)
i modify my kal and remove fuel at 4900 rpm cam angle 50 about 20 % and see the gauge for af..bad it's the same about 11.5 but i hear a difference when driving car is moore fast in going up of turns and the activation noise vtec remarkablly is diminished!
next i try the kal and remone another 10 % of fuel and see the a/f same gear (4th) same af 11.5..why?
next i reduce the ignition value, from 32? to 30? and the noise vtec engaghe is disappeared and drive car is very good but in the datalog from plx i have a 1.13 volt about 12.3 af ratio..!
where is the problem?
it's possible the ignition or too high or too low?
i have attached the excel sheet about my voltage wideband..
sorry for my bad english but i'm italian boy :-)
my car have this modify:
OBX RACE HEADER
catback system 2.25"
airbox modified hondata with kn filter
hondata img
throttle body bored
KPRO
a/f tunning problem!
a/f tunning problem!
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Honda Ep3 stock k20a2 jrsc