[kubel]

I was in line at Timmy's drive thru getting my morning double-double and was slowing creeping forward with my foot on the brake a little, and I found the car would jerk forward roughly once a second, then let go, then jerk forward, then let go. Has anyone else experienced this? ICE wasn't running.

 

[BAZINGA]

What gen? But how odd, have owned three Volt's (2012, 2013 and 2017) since March 2012 and over 50K miles and never experienced what you are experiencing. All three of mine have been silky smooth.

I'm guessing if it's that noticeable you probably need to book an appointment with your dealer.

 

[SkepTeach]

I was sitting on an incline waiting to pull into traffic, foot off the brake, and I noticed it would gently roll slightly forward, then back, then forward, then back. I'm guessing this is similar to what you experienced? It wasn't jerky though.

 

[tiger955rider]

I have also found that 1 second pulse. It seems to happen only at a certain amount brake applied. All of my previous ICE vehicles would do a brake chatter with the same situation. I believe it is the automatic forward creep turning on and off at that tipping point.

 

[Dutch]

If I press on my brake to just the right pressure level I can get this effect too, though mine isn't jerky either. So I've learned to avoid that "pressure area" on the pedal and either let up, or press harder. The "jerk" description is slightly troubling to me though.

 

[don shaw]

pressing on the brake pedal shuts off the electric motors, so probably you are pressing the pedal right at the spot where the motor is turning on and off/

(to see the effect of the motors being on when stopped, bring car to full stop with press on the brake pedal. Next, apply the parking brake and subsequently release pressure on the brake pedal, The front of the car will rise, as power is applied while the parking brake is on but the parking brake prevents wheel movement

 

[llninja]

My gen1 does this when I'm at the end of my gravel driveway where there is a slight downward incline. It sometimes feels like someone tapped the accelerator, but I think it's the antilock brakes not working, then kicking in, then releasing.

Also, when I had worn tires I would get a similar effect when braking concrete on once part of my commute where there was a small seam working its way into a pothole. As I'm braking, when I hit the hole, the tire goes airborne, kicking in the abs for a brief moment, and giving my body a short sense of uneasiness.

 

[chevyman142000]

Yes, I have this happen on my 2017. Problem is it is hard to replicate so I haven't been able to take it to the dealer. I also will get it happen when accelerating after stopping from time to time. Do you happen to also have the brake pedal will lose braking or sink down when braking?

 

[mach170]

I've noticed this when slightly releasing the brake while stopped. I suspect it is from the rotor on the electric motor getting pulled to the next magnetic section of the motor. Then power builds up and pulls it to the next magnetic section and so on.

 

[arkar]

I haven't been able to replicate with my 2017.