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Rough Idle/Stumbling in General But Especially After Fill-Up

24K views 31 replies 12 participants last post by  2019_FFS  
I've been noticing sometimes rough idling (like when sitting in car for a few minutes to let engine warm up from cold start). But I don't fill up to the max, maybe 3/4 full. Would this be the same or different problem?

thanks,