its ok, mostly.
idle hot 800 and regulates.
closed loop ,checks are very hard to do , lacking scope, scan tool , . (o2 swings about 6 times a second , something that confuses most DMMs)
the only why know closed loop fails, easy is low MPG.
if the 02 sticks high, engine goes lean and bogs and power loss (very rare for this to happen)
if sticks low goes rich and wastes fuel. but with extra power, (that is how it works,,, Stoich Airfuel is low smog, max mpg, but open loop is opposite and more power.
when you accelerate you drop 02 and Stoich and makes full power, that is why driving aggressive wastes fuel, that simple.
or driving near WOT. some cars drop 02 and go rich at 75% throttle.
here is mine , at idle , look same at light flat cruise.
this dirt cheap scan tool is a tad too slow .
it ties hard.
but the 02 is clearly seen swinging here perfectly , this is MAX MPG on gas cars. made. using this narrow band sensor.
![[Image: O2b1s1.jpg]](http://www.fixkick.com/sensors/O2%20sensor/O2b1s1.jpg)
this is the final goal, getting swings just like that. and when it does that, it burns every drop of fuel.
what this is , is the ECU HUNTING perfection... (one more servo)
my innova 3160 does this better. in 02 graph mode.
idle hot 800 and regulates.
closed loop ,checks are very hard to do , lacking scope, scan tool , . (o2 swings about 6 times a second , something that confuses most DMMs)
the only why know closed loop fails, easy is low MPG.
if the 02 sticks high, engine goes lean and bogs and power loss (very rare for this to happen)
if sticks low goes rich and wastes fuel. but with extra power, (that is how it works,,, Stoich Airfuel is low smog, max mpg, but open loop is opposite and more power.
when you accelerate you drop 02 and Stoich and makes full power, that is why driving aggressive wastes fuel, that simple.
or driving near WOT. some cars drop 02 and go rich at 75% throttle.
here is mine , at idle , look same at light flat cruise.
this dirt cheap scan tool is a tad too slow .
it ties hard.
but the 02 is clearly seen swinging here perfectly , this is MAX MPG on gas cars. made. using this narrow band sensor.
this is the final goal, getting swings just like that. and when it does that, it burns every drop of fuel.
what this is , is the ECU HUNTING perfection... (one more servo)
my innova 3160 does this better. in 02 graph mode.
http://www.fixkick.com