Sounds like worn rockers... pull the hose from the intercooler to the intake on the drivers side and see if it’s popping or backfiring in the hose, sure sign of trashed rockers. I fixed 10 in the last year, very common in the 100k + miles from using the wrong oil or going too long on the oil change.
Here’s an example Of what it can sound like
https://m.youtube.com/watch?v=95x7NiozPB0If it is worn rockers you had better find a shop or person who is familiar with these engines to fix it. So post your location and someone will guide you where to go. You can also go to Sasquatch to find a shop nearby who knows how to fix these Jeeps.
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