You have to find out where the popping sound is coming from, it can be a bad intake or exhaust valve or bad lobe on the cam, Ignition timing, rich or lean fuel mixture, or just a simple vacuum leak,
check all the hoses on your engine, and listen for hissing while it runs, vacuum leaks are often found by hearing a hissing, even when the brake booster leaks and you hear it hissing by your feet while you drive,,
Good luck, if you find anything and have more questions, leave me a comment, I'll help you!
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