Misfire around 2k rpm intermittent

smokey_the_xterra

Test Drive
Location
Milton GA
2005 Xterra with 205k miles, I have a slight misfire under light load at around 2k-2,300rpm. It is not all the time and won’t throw a code! I had this same problem earlier this summer so I changed my spark plugs and it went away until now. What do you guys think it is? This thing won’t give me a break with problems.
 
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