Ah, the dreaded P1399 and misfire codes...I've been reading a lot about this on the forum. Here's our issue. It's a 2000 Honda CRV and is throwing the 1399 code as well as other misfire codes. Depending on when I read the code, it is either just 301, or sometimes it's 301, 302, and 303, plus the random/multiple misfire code. I have not had the valves adjusted since buying the car 6 years ago because it wasn't something I was aware of. I've found a mechanic who says he can do the valve adjustment for 75 bucks. Is this worth doing? It has 190,000 miles on it and I'm hoping I can squeak out a few more months on the car. So far, I've done the spark plugs, the distributor cap and rotor, working on the ignition coil, but can't get it out because of a stripped screw, and a new fuel filter.