Originally Posted by
MRRPMBRP
For sure up to a point, as if we were to put the sensor in an 8ft pipe, of the same length, guarantee it wouldn't meter the air correctly as it does now at idle.
On mine, it has a super big tube, cams, and large tb, the worst combo to make idle nicely, but it does still. I did notice a difference in A/F ratio control when I installed the super big tube, compared to the smaller one it had. Not a difference of rich or lean, but of being able to keep A/F where it was commanded, low rpm, part throttle light load, where airflow is very slow through the sensor. Seems to swing around a good bit, with nothing changing, according to the sensors input to the ecu. It's not a problem at all, works good actually, motor sounds happy, but it still acts like unmetered air going in.
As far as the OP's problem, I'd say he needs to adjust the throttle table, and torque table(s) to get his throttle ironed out. He doesn't say what car, tb, motor, combo he has, in this thread, but that's where I think he needs to go