I realize this thread might be too old for a reply but here goes...I've been driving my 99 rx300 for one month. I purchased it in Houston and drove back to central Texas with no problems, smooth as silk. It is a clean car with only 91K. Yesterday, I had to accelerate hard and quick to avoid an accident. About five miles later, I stopped at a store and when I started the car to leave, the cel began flashing and I got the sputtering and missing thing. O'Reilly printed out codes P0300, P0303, and P0304. I also noted that the trac control off light comes on after startup. Is this going to be the same problem I see in this thread? Which replacement should I start with? Any suggestions would be greatly appreciated.