For a while now my car has had a problem where after pushing the revs it still feels like it ignites the odd cylinder on the wind-down and I can hear it popping on the way down. It significantly slows down the wind-down as well to the point where engine braking in very inaffective which isn't ideal for a spirited drive and I want to slow down quickly.

In one instance I came to a complete stop and the engine was idling at 5k until I turned it off and back on. So I decided the clean out the throttle body which solved the idle issue but not the wind-down issue.

Any help would be greatly appreciated.

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