Very low speed Vibration

I have recently noticed a vibration that occurs at VERY low speed - such as below 0mph and 1mph, while just starting (or stopping).

The best way to describe this vibration is that it feels somewhat similar to going over a rumble-strip - but not quite so intense.

It only happens for a very short time while just starting off (or coming to a stop) - and then goes away. You almost have to try to make it happen. If I try to carefully control the increase of the car's speed, I can -sort of- extend the amount of time that this happens.

I certainly have to be on the 'look out' to notice this and attempt to make it happen to really identify it. Otherwise, (if I accelerate too quickly i.e.: normally) it just feels like a couple of bumps in the road.

I think I read on here somewhere something about a breakdown of the winding insulation that provides such an effect? Has anyone else ever experienced something similar? Is there any straightforward way (perhaps with a scan gauge or other tool) to conclusively diagnose this?

Any other experiences/guidance would be appreciated. Of course, I need to bring it to the dealer, but based on how difficult it is to 'find' this problem (if it is a problem) and how short lived it's effect is - I can imagine that getting the dealer to acknowledge it as a problem will be a challenge.

Thanks much,
Eric

 

Hi. Thanks for your help.

In this case, it's not the ICE. The 'vibration' occurs at a very specific speed, while the ICE is off.

It's sort of like a resonance phenomenon - where it builds as you approach the magic speed, and then tapers off as speed increases above the magic speed.

In this case, the 'magic speed' is very, very low (less than 1 mph), and the window / range of speeds for which it is noticeable is very narrow. With very much, careful concentration and application of the brake (to maintain the 'magic speed') - the vibration can be made to occur continuously.

Hopefully this is a bit more information, and a better description.

Thanks,
Eric

 

Thanks for your input. I appreciate your help and guidance. It's definitely not the ICE, and has no relation to the ICE.

As I said in my original post: "Of course, I need to bring it to the dealer..."

And, I'm well aware that the car is still under warranty, - but before I go to the dealer, I'd like to gather as much intelligence about this occurrence as possible. I know there are some great resources on here that in some instances may know more than average dealer service techs. I believe that the greatest value will be to start with such resources first.

I am seeking any input from someone who may have experienced a similar problem and had progress with regard to diagnosis and/or repair - perhaps with regard to winding insulation breakdown, as has been mentioned elsewhere here (although it may not be the same situation) - I think (hope) that winding insulation breakdown may result in a code and warning light.

Thanks,
Eric

 

Hi Tom,

So far, I have only observed it moving forward. (While progressing slowly in a very long on-ramp line.)

Oh - now I get your joke - "below 0 mph" should have been "below 1mph" ;-)

Eric

 

Thanks. I haven't noticed it while turning - but will keep my eye out for it now... In order for it to be more than a very brief blip, I have to control my increase in speed very carefully - it actually takes some effort to make it more noticeable...