Hello Robe,

I'm currently diagnosing a 25LC-7A that has a noticeable misfire but only at idle. Check engine light is on but I am unsure of how to check the codes.

There was a hose leaking on the mixer, that has been replaced. Also the spark plugs have been changed, all coils seem to be in good working condition. Misfire goes away during any off idle rpm including a manually held rpm.

Thank you