The most likley cause is the coil and or igniter pack. It is also common for the rotor button under the distributer cap to brake and in some extreem cases for the distributer itself to be stuffed.
After that, you have the electrical sytem to look at, wiring, then the computer or ignition system. But to help you, the 94 Camry v6 does have a diagnosis plug, and with the standard equipment the fault code can be read; or you can run a jumper piece of wire between 2 contacts there.... check your contacts and connections as the CEL light should flash the error codes.
That will cause the CEL ( Check engine light ) to flash a given number of times. That will tell you the trouble code and you can Google the trouble code
Then disconnect the battery for 5-10 minutes, and repair the item that is causing the code. The CEL should not comes back on. It may take 20 + miles of driving for the light to come back on if another code has been thrown.
A short circuit.
Will a 1998 Toyota Camry motor fit in a 1999 Toyota Camry
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.
No, it will not.
The blower motor resistor is defective.
I would start with replacing the spark plug wires and spark plugs (if you did not do that for a while). If does not help check the coils or distributor depending on what you have.
Yes, it can cause check engine light to come on. Reasons are multiple - anything from air/vacuum leak, spark problems etc. to major failure.
Bad spark wire (common problem) or failed coil.
Tire out of balance or bent wheel.
Could be your timing belt.
Yes. Both Toyota and Camry are proper nouns (brand name and model).
Toyota Camry coil wire can burn out from age or excessive use. The manufacturer recommends that you change the coil wire every 30,000 miles.