I made a post a little bit ago about a jerking sensation while in drive at idle. Car is 2013 Chevy Cruze with the 1.8L motor, Auto Trans. 84K Miles
I put on the ebrake with the car in drive and popped the hood because there is a distinct noise coming from the engine that is in sync with the jerk
https://www.youtube.com/watch?v=u0sU35Bg6e0
Here is the video of the noise. What could it be?
Recently changed spark plugs. My bluetooth scanner didn't detect misfires when it was happening, cylinder 4 sometimes misfires on startup. But no codes.
Have you tried swapping the coil to another cylinder and checked if the misfire moves to the new cylinder? If it does, replace that coil.
If it doesn’t, watch Scotty’s video - https://youtu.be/sZg3YrAb6co
Like I said there are no misfires when the noise is occurring just slightly on startup but after that I get no misfires so I don't think its related. Plus the coils for this car come in a pack with all four so unfortunately I would have to buy a new pack to test that.
I will do more poking around to try and isolate where the noise is coming from.
I was told by a couple people it might be a belt pulley