Could be the distributor. That just happened to mines.
How do you change spark plugs in a 6 cly Toyota Camry?
how to replace spark plugs on 2006 camry LE
To change spark plugs on a 1994 Toyota Camry, remove the black shafts. The spark plugs are down the four holes. Use a socket set with extension to reach the spark plugs. Replace old spark plugs with new ones.
A 1996 Toyota Camry that will have spark and then sometimes no spark might be having a problem with the spark plugs. Each individual spark plug is now a solid state electrode in that year of Toyota Camry. The ignition coil pack on top of the spark plug is probably loose or cracked.
change the plugs at 60,000 miles.
100-120K miles.
remove upper intake plenum
1342
Every 100K or when necessary.
To check the denso spark plugs compatibility with your 2006 Toyota Camry, I would suggest you refer to a garage or a Toyota dealership, in person or online. You always have the option to email them with any concern or information you have on your Camry. Your Toyota dealer is always in the know on their cars and which parts are best suited, even for older models: they remain their models.
It is feeling silly and my other answer is it is behaving badly
In the engine ... usually on both sides or inline on the top.