What is keeping us from running o2 sensor-less? I've heard the ecu only has 16 fuel points (you'd know better than I would ), and so does an emanage. S-afc II has 12. Couldn't we drop the o2 sensor(s) and run off a fuel map? This should make tuning easier, because instead of the ecu adding/removing fuel, it should run on a flat-map, which is then adjusted totally by the piggyback.
Just an idea. Feedback, flames, ect are appreciated.
-Jeff

 

I would think that non O2 sensored run cars usally also run of MAP sensor (Manifold Absoult Pressure)? if i'm not mistaken. But who knows

 

ok,

ALL modern fuel injection cars run an oxygen sensor. both MAF and MAP variaties.

the O2 sensor is usually used for what are called long and short term fuel corrections. short term is an instantaneous correction to the amount of fuel supplied, long term is a pre-calculated correction to the amount of fuel supplied. on SR's an KA's the O2 correction is only short term form the best of my knowledge. it is also only applicable to certain areas of the fuel maps. usually under light load conditions. also, the O2 sensor usually gets ignored during WOT. so, why do we want to eliminate the O2 sensor, it doesnt really hurt us.

 

No o2 sensor saves me $5 on a o2 bung, and $80 on the damn sensor
-Jeff

 

So what happens if you run on flat pre-programmed maps and then the whether changes dramatically? If the intake temp drops by too many degrees does that mean there is more air getting into the cumbustion camber cause it is more dense? If so then couldn't you in theory be running into the lean side tooooo much with colder weather. Also, what happens to an engine with the fluxuation in humidty? Is the o2 sensor just one of the imputs the computer uses in open loop to make adjustments for such things?

 

The air intake temperature sensor and mass air flow sensors adjust for that. O2 sensors change the fuel based on a:f ratios.
-Jeff

 

just upgrade to a realtime o2 sensor and scrap the analog sensor.

 

$80 for an O2? I thought you were better than that. Universal Bosch for our cars run around $23. It doesn't come w/ the OEM harness connector but just splice and dice from an OEM one. You can also just splice in w/out the harness, it's one wire for heavens sake...

Jesse