99 Millenia 2.5L P0300 Stumbling idle

[dshine32805]

I have a 99 Millenia 2.5L, automatic, 184k,

Yesterday out of nowhere the engine started to run really rough at idle, no real power loss when driving, idle is stumbling really badly though, feels like it is going to stall and the lights dim.

CEL will come on and blink then proceed to cycle back to on and blinking. Checked it and got code P0300, can't seem to find much specifically for the Millenia. Anyone experience this issue before?

Where do I start? Can I troubleshoot components at home without purchasing anything?

thanks in advance

[yel-low]

Originally Posted by dshine32805

can't seem to find much specifically for the Millenia. Anyone experience this issue before?

Welcome to the forum. Did you happen by chance to notice the little "Search" link on the top of the forum? That issue has been discussed hundreds of times on here both for the 2.3 and 2.5.