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k....just so you know, idle surge (bouncing) is 90% of the time cause by a leak in the intake system.
Don't know much about the popping except it could be a fuel/air issue. Usually too much air going into the engine. The pops is excess fuel exploding from poor combustion. Could be you need new spark plugs or you do have a bad air/fuel ratio by excess air.
I wouldn't be surprised if you have an intake problem....IE vacuum leak, dirty throttle butterfly, throttle body sensor.
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