|
Yea even my 2000 MY car with cable throttle 1ZZ and narrowband sensors doesn't go open loop until who knows how many rpm. It said closed loop at well over 3000rpm and heavy throttle.
On newer cars with wideband sensors I think it might be more common to run rich to extend catalyst life, but not sure. Wideband sensors allow closed loop enrichment.
I'm not sure what ideal load is if 100% load is stoichiometric, but I'm guessing probably 80-90 :O I know peak BSFC of this engine is pretty ****ty at full load (I think in the 260s g/kwh) according to the Toyota development paper, which is what leads me to think that.
|