I have a misfire on cylinder #3, It only happens after revving the engine really high then when I idle, it stops working. When I drive up to maybe 25 mp/h it kicks back in and I feel it jolt and is fine until I idle.
I have replaced spark plugs for all cylinders, and the coil pack for cylinder #3.
I went to a shop and they told me that it's not holding compression.
Does anyone know if compression actually could be the problem? I don't know cars that well but it just seems odd to me.
Chevy Cobalt 2008, 2.2L Engine