Throttle by wire behavior?

[uniberp]

I need some comparison data/opinions for the throttle behavior on my 2008 Forester.

 

How I've trained my ECU: I am a mild driver. Commute at 68 everyday 50 mile round trip. That's about it. Use my truck on weekends.

 

I noticed if I fully stab the throttle at road speed, say 50, and release, it goes into pretty hard engine braking for about a second after, much more so that if simply releasing the  throttle. It was a little disconcerting. (I was wearing heavy boots, slipped and stomped it)

 

Normal behavior for this car?

 

 

 

 

 

[Gloyale]

it might have thought you were in a "power" or "sport" mode as far as Torque Converter lockup.  That's more likely what you were feeling.

 

Since you stabbed the gas suddenly, it thought you were in a more spirited driveing session, like hard corners, on off throttle....so it was locking the TC to give you more engine braking and control in the transistions.

 

When you are cruising, and let off the throttle, it doesn't lock the TC for gas mileage reasons........kinda lets you "coast" a bit down the hills a bit until you are completely off throttle for a few moments.

Edited September 28, 2013 by Gloyale

[Fairtax4me]

More a function of the transmission than the throttle body.

You stomped it hard enough to make it kick down into 3rd,(maybe even 2nd) then let off just as it shifted. Engine speed went up since it shifted to a lower gear. Higher engine speed means more engine braking. Stays that way for a second then it figures out you're not still at WOT, so it shifts back to 4th and then you cruise along.