[TheQuestionGuy]

Driving on the highway doing about 70.
Slap the peddle to the floor to accelerate, and less then a second later complete lift the foot off the gas (usually do this because someone has decided to change lanes right in front of me).

After my foot comes off, the RPMs jump to 6,000 yet my speed remains the same.

Anyone else notice this? Is there a reasoning for this behavior?

 

[Ddaddy]

I've never had that happen. Does the engine sound like it is going at the 6000 rpm or is it just the gauge?

At that speed and rpm the tranny is locked up and engine rpm should match gear selection and speed. Unless the tranny is decoupling and the throttle is sticking, I don't see how the rpm would jump that high with your foot out of the pedal.

 

[TheQuestionGuy]

yes you hear the engine rev up.
This is the 2nd 2015 Charger I have driven and could replicate this behavior in both.

 

[Ddaddy]

It sounds like something in the tranny programming that decouples the tranny and it takes a second or two for the engine throttle to peak and recover back to pedal position.

I would guess that this is related to fuel economy to allow the tranny to "coast" when the throttle is released and the specific circumstance you describe of going WOT just before the throttle release is causing it to happen.

It makes me wonder if you suddenly took your foot out of the pedal at normal highway speed if you would see the rpm drop to idle almost immediately.

 

[TheQuestionGuy]

It makes me wonder if you suddenly took your foot out of the pedal at normal highway speed if you would see the rpm drop to idle almost immediately.

Tried this a couple of times around 70 and 75.
Each time the rpms remained constant.

 

[Ddaddy]

Tried this a couple of times around 70 and 75.
Each time the rpms remained constant.

Weird. I wonder what it is about the WOT condition that causes it to happen? :dunno: