I have the exact same symptom. How did this work out for you?

Just thought I would finish this thread. The P0303 code stopped and has not come back after 300+ miles, so I guess changing the plugs has solved the misfire problem for now. Thanks for all of the help.

I just might do that. On my way home from work yesterday, I didn't get any codes and no CEL flashes, so maybe it is OK.

Today I pulled and re-gapped the new plugs. It did flash the CEL and I got a p0303 code. Hey, at least the p0300 is gone. I'm starting to wonder if these plugs are going to work for this car. I don't ever feel a misfire.

Did the guy at Autozone actually try to read the code? Sometimes there can be a code even if the light goes off.

A code reader is worth every penny.

Maybe check the hydraulic engine mount in the front, under the fan.

What is the proper gap for the plugs? This would be the only other thing I can think of that would affect more than one cylinder.

Do you have a link to the battery replacement procedure?

This morning the car is running great. I stopped and picked up some fuel injector cleaner and filled up the tank, and within 5 blocks the check engine light came on. I am got p0300, p0302, p0305, and p0305. Can the fuel injector cleaner cause these types of misfire codes?

I didn't know about the evaporator drying cycle the first time it happened. After using the air conditioning and the weather conditions are right, the blower will automatically turn on and blow until the AC evaporator canister is dry, but it waits until you are done driving and have turned the car o...