Coil pack air leak??? 2000 merc Grand marq

wj7wj7 Member Posts: 1
Our 2000 mercury grand marquis sound like it has a vacuum leak (air leak) out of the manifold once the car warms up. The popping noise is more pronounced (happens more frequently) when the car is under a load (drive versus park).

I poured some soapy water over the area of the noise and got some bubbles. The bubbles are coming from the area around the coil pack(I believe this is what this is called).

Why would I have air bubbles coming out of an electrical device. What am I missing? Thank you for any help.
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