ait resistor mod

[pigpenracing]

Are you sure it only works for 15 minutes or is this just something you read? The resister tells the computer that the air going in is 25 degrees cooler. This makes the computer change timing and fuel to compensate. Yes the o2 sensor reads how rich or lean it is, but the computer is still tricked telling the sensors something different. Some people relocate the ait sensor to get cooler air. This don't work either? What if I was to buy a $300 chip. How do we know it does not do the same as this ten cent resistor? The high dollar chips just fool the computer also correct?

[Chris07LB]

save yourself the time..

[eTiMaGo]

Originally Posted by pigpenracing

Are you sure it only works for 15 minutes or is this just something you read? The resister tells the computer that the air going in is 25 degrees cooler. This makes the computer change timing and fuel to compensate. Yes the o2 sensor reads how rich or lean it is, but the computer is still tricked telling the sensors something different.

Correct. But the ECU's algorithm works in such a way that it uses the O2 sensors for the long term fuel trim. As you said the computer will change the fueling at first, but the O2 sensor will keep telling it that the output is too rich or too lean all the time, so the ECU will readjust itself.

Some people relocate the ait sensor to get cooler air. This don't work either?

those who have tried their hands at custom intakes have had related problems, where CELs would show up if the sensor is placed in a certain way.

What if I was to buy a $300 chip. How do we know it does not do the same as this ten cent resistor? The high dollar chips just fool the computer also correct?

Well what those with piggyback systems like the e-manage unplug the rear O2 sensor, this puts the engine is a fail-safe mode where this long-term adjustment is disabled. But, the CEL light will be on at all times. I suppose you could do this too with a resistor mod, but I doubt the benefits will outweigh the inconveniences.

What I have yet to see anyone try, though, is to try and adjust fuelling through modification of the O2 sensor output?

[pigpenracing]

Go to ebay and type in yaris chip under search. They have one that ties into the ait sensor and o2 sensor both. It has an adjustment knob on it also. They also sell one that goes just on the o2 sensor.