codes P0301 cylinder #1 and P0316 Eng misfire detected on tartup-1st 1000 Rev on 2003 Ford Taurus

I went to get my emissions done and got the following codes P0301 cylinder #1 and P0316 Eng misfire detected on startup-1st 1000 Rev what does it mean and how do I fix it asap

2 answers 2 comments
changed fuel filter and codes (P0301 and P0306) disappeared. Changed on Ford Taurus at 101,000, may have been original filter. Tank side gas was dark brown.
Thought I was going to have to change out the spark plug wires and ignition coil.
P0301 means misfire detected on cylinder #1, for 300 consecutive revolutions. P0316 means the misfire was detected in the first 1000 revolutions. It all means you had a dead miss on #1. It could be a bad sparkplug, a shorted to ground sparkplug wire (likely). You didn't tell us which particular engine you have, there are 3 choices for 3.0 liter, like Flex Fuel, for instance. The high output engine has an ignition coil on each cylinder, the one on #1 could be bad if that's the case. If it doesn't have a coil on each cylinder, it's probably not a coil but a wire or plug. there's the possibility it's an injector problem too, also possible that there's a mechanical problem like a bad engine valve but not likely. I once found a faulty ground side circuit for the injector in a car like this which caused a similar problem. check the sparkplug and wire first, though before figuring whethe there's a poblem with the injector.
I have the same problem but the engine i have is a EFI 6 cyl, same codes too P0301 AND P0316 i have changed out the sparkplugs and even got a new coil pack, but still have the problem of rough idle when driving and in park, i haven't tried to change the wire on number 1 or check the fuel injector.