2007 Toyota Camry — single-cylinder misfire comes and goes

Ask what changed right before it started. Swap the cheap/easy piece first on the 2007 Toyota Camry and see if the fault moves. Don't erase codes until someone who can help has seen them. I'd want a dollar figure or a measured spec, not 'should be fine.' Not driving it hard until I know more.

Log the conditions before you spend. Write temp, speed, and in-gear vs coast when the 2007 Toyota Camry does it — then decide on parts. If the cheap test changes it, stop and reassess. On “single-cylinder misfire comes and goes,” that was the fork that mattered for me. Time, temperature, and whether it's in gear are the notes that actually help a shop. Next check is the cheap one I can do in a driveway.

Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2007 Toyota Camry and see if the fault moves. Save the big job until that test fails. No need to make it theatrical. Your commute and mine probably aren't the same, but the test still applies. No warning lights, which is why I'm documenting it.

Cleared nothing. I want service to see the alert on the 2007 Toyota Camry first. Heat soak after errands is the other window.

Ask what changed right before it started. Move a coil or plug on the 2007 Toyota Camry if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. Time, temperature, and whether it's in gear are the notes that actually help a shop. Checking again after work.