Adjustable O2 sensor

[CartsXJ]

I had a question about this idea in another thread, hopefully somebody has done or thought of this before. When the system is in close loop mode, throttle <70% it read the O2 sensor and adjusts the system accordingly no matter what the MAP senosr says. Is it possible to change what, voltage/amps.etc., the O2 sensor tells the computer during this mode to gain performance? Or am I barking up the wrong tree? And speaking out of my:moon:


Hopefully the Dr. will chime in:D

TIA

[MaXJohnson]

I had a question about this idea in another thread, hopefully somebody has done or thought of this before. When the system is in close loop mode, throttle <70% it read the O2 sensor and adjusts the system accordingly no matter what the MAP senosr says. Is it possible to change what, voltage/amps.etc., the O2 sensor tells the computer during this mode to gain performance? Or am I barking up the wrong tree? And speaking out of my:moon:


Hopefully the Dr. will chime in:D

TIA
in closed loop, the MAP sensor is still used to determine load. The O2 provides feedback to determine whether the fuel map is on target, too lean or too rich. O2 output is sampled repeatedly by the computer and fuel trim is adjusted accordingly. Output from the O2 sensor is like an on/off switch. It either detects too much oxygen or it doesn't. If you fake the signal from the O2 sensor, the computer would continuously read samples of too rich or too lean and keep incrementing the fuel trim accordingly until it hit the limit of rich or lean. It would then stay there until your fake signal was removed. I don't see how you could use that to do anything productive.

[5-90]

Yep, and the HEGO sensor signal isn't adjustable per se. Besides, as mentioned before, it's more of a "feedback" signal than an actual adjustment - it's used to verify and fine-tune the fuel metering to keep things up to scratch. You really don't want to go to the trouble to adjust that signal - you'd be better off adjusting a fuel metering input - like the MAP or CTS signal (don't play with the TPS either...)

5-90

[CartsXJ]

Hey guys thanks for the enlightenment about the sensors, not touching anything else except the MAP.

[gradon]

good ?!