So instead of relying entirely on my own subjective impression, I started digging.
I plugged in a data logger to the Infiniti’s OBDII port and started recording throttle position, pedal position, RPM, and more.
To be clear, this wasn’t an engineering exercise or an attempt to uncover a defect. It was a curiosity test on a single press vehicle.
What The OBD Data Showed
Looking through the logs, one pattern repeatedly stood out. Relatively modest accelerator inputs often appeared to correspond with much larger jumps in reported throttle activity.
Low pedal applications could feel muted, while slightly more input seemed to trigger a noticeably stronger response.
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Importantly, the graphs didn’t reveal signs of an obvious failure.
We didn’t observe erratic signals, random drops, dead spots, or behavior typically associated with a failing accelerator pedal sensor or throttle issue.
RPM traces also behaved predictably.
Still, the overall shape of the data appeared to broadly mirror what I felt from behind the wheel.
Specifically, a response curve that sometimes felt less progressive and linear than expected.
There are a lot of caveats here.
OBD logging isn’t the same as factory engineering data, and parameter scaling can vary based on the scan tool, available vehicle signals, and how individual manufacturers report information.
Modern vehicles also filter driver inputs through layers of torque management, transmission programming, and software logic.
In other words, these traces should be viewed as supplementary context, not proof of how Infiniti calibrated the QX60.
