So far I haven't seen the PO300 in my '05 Evo, but the other week I was visiting my grandma and her car was running really rough and uneven, the CEL popped on and I told her to take it to the dealership to get the code read.

She took it in later that week and called me to tell me what it was. She said "they said something about PO300"....i started laughing....not because it was funny, but because I knew exactly that PO300 is the DTC for "Random Misfires"

This was on a 1996 Oldsmobile.

Anyways, thought it was a funny story.

/ancker