My scanner interprets it as "means Engine Misfire Detected on Startup (First 1000 Revolutions)"

I am troubleshooting the same codes (different cylinder PO301, which is more covienent) replaced the spark plug and it went away for 15 miles, now back with PO301 and PO316 again...

Next work is Coil Pack, then Fuel Filter, if that doesn't solve it. Let me know what you find, and I will do the same!