fuel mileage indicator - accurate?

[tranquility]

You know the one that gives you the 'instantaneous' fuel mileage depending on how much you press the gas pedal? I'm not sure if mine is still acting up. Whenever I accelerate, it is accurate because the # goes up, but when I let go of the gas pedal, the # still goes up for a few seconds before going to 0: is this normal?

[rking117]

Originally Posted by tranquility

You know the one that gives you the 'instantaneous' fuel mileage depending on how much you press the gas pedal? I'm not sure if mine is still acting up. Whenever I accelerate, it is accurate because the # goes up, but when I let go of the gas pedal, the # still goes up for a few seconds before going to 0: is this normal?

Yes it is normal. It is as accurate as it can get for software driven results. The problem is that the instant mileage indicator is not reliable. Over a larger distance it can be so your distance to empty is a bit better but still off by a bit.

[tranquility]

So when I'm pressing the brake and the # still goes up before going to 0, it's still normal? The reason I raised this is because I though that it was super-accurate before and never noticed the # going up before, so wonder if I have a glitch now.

[Baremeg55]

Originally Posted by tranquility

So when I'm pressing the brake and the # still goes up before going to 0, it's still normal? The reason I raised this is because I though that it was super-accurate before and never noticed the # going up before, so wonder if I have a glitch now.

Yes, it makes sense. You are coasting to a stop, so no load on the engine, results in large MPG figure. The number should go up from the time you let off the accelerator until the car comes to a stop.