Idle rocking? Vacuum maybe

[paddy1000111]

Hi all,

I had a rib tear off my 4 month old aux belt and slap it's way around the engine. Since then I've noticed that when in Neutral and stopped the idle causes the car to gently rock, that's with the AC off etc and there's no notible engine noise change. It feels as though it's missing at idle but there's no roughness to the engine.

I'm not sure if it was there before and I'm more sensitive to it now or if the belt might have damaged a vacuum line stopping the mounts going to idle mode maybe? Does anyone have a vacuum system diagram or any useful help?

 

[CSGMART]

Seems like you spotted the same thing as me. Others said it was normal.

Thread here - https://www.ftypeforums.co.uk/viewtopic.php?t=8346

 

[paddy1000111]

It could be normal. Just seems to come and go. It was particularly bad earlier when I started it from cold. Drove it hard, stopped and it was still there. Drove it to the specialist to ask and it went away in true fashion