Have codes now what ! 2003 Disco help!

[fishhawk]

I was at the stop light the other night and it started to shutter like a miss fire. The Check engine light came on , drove it about half mile it stopped smoothed out.. then start again. I had the codes checked and they are as follows. P1319? and 307 code. The guy at the shop said one of the codes was a miss fire on cyl 7. So I put new plugs in it today and it started skipping on and off eratic. The check engine light stays on and the brake light also is now coming on and off erratic. I went by advance auto the guy there checked said the code was a missfire on 7. What should I replace next the wires. Also could the power pack be failing? Thanks for any thoughts or suggestions . Mark

[Disco Mike]

Probably also need to replace your old wires with some new 8 mm silicone wires, how many miles on your engine?

[fishhawk]

It has 120,000 all road miles.

[Savannah Buzz]

1. Check brake fluid level. Brake warning light un-related to misfire codes. You obviously have the multi-volume set of Murphy's Law, Rover Edition.

2. P1319 is Misfire detected with low fuel level, like Mike says, many times misfire codes go away with new plugs and decent wires.