Coils and plugs replaced - what brand? Misfire is nearly always the coil. Injectors fail, but coils are more common.
Start by swapping the coil and plug from cylinder 3 to cylinder 2. If the misfire moves with it: it's a coil. Get a new coil. Bosch or Volvo only. Everything else is junk.
IF the misfire stays on 3, then it's your injector.
For injectors, I would send all 5 out to this guy: http://www.hurstinjectorservice.com/
He's awesome. Did the injectors on the XC and it runs like new. Under $100, including shipping. A bargain. He's also done the injectors on a 1975 Mercedes 450 SL that I'm working on. Best way to go. New injectors will cost you more than twice what he does.
Current Fleet:
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (126K, Michelin AS4, HPL 0W40)
2005 MB SL600 (55K Michelin AS4, Mobil 1 0W40)
2004 V70R (143K, six speed M66, HPL 5W40)
2004 XC90 (235K, HPL 0W30 Euro)
2002 V70-XC (295K, HPL 0W30 Euro)
2002 V70-T5 (225K, IPD bars, Bilsteins)
2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)
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