My 2000 3L SE recently began having an intermittent stumble under load. I hooked up my Ultragauge and finally got a pending trouble code; P0305. I checked and found it indicates a cylinder #5 misfire. I was able to search and find that cylinder #5 is the middle cylinder on the left bank of the V6 engine; on the easy side! I've never replaced any of the ignition coils so I guess I'm due.