I have a fuel injected 03 Heritage Springer with Screaming eagle stage one, k & H air filter, TFI, super trapp slip on pipes. I have also replaced the plugs and plug wires. Normally, she runs real good. For the last three months or so, I have noticed that when I start it up, it either hits right away or it chokes (sounds like its sucking in air), pops, a little smoke comes out of the air cleaner, and then it takes a few cranks to get her to fire up again. I didn't think anything about it until yesterday when I was riding home from work. I started her up and she hit right on the first crank. I rode for about 20 minutes in traffic (start and stop) and then decided to fill up on gas. I stopped at the same place I always do and filled up with high octane as normal. The gas pump was running really slow, so it took for ever to fill it up. I started her up and drove about 1 minute when all of the sudden it back fired, lost power, then hit again and kept going. It kept doing this over and over, sometimes much worse than others. If I squeezed the clutch and revved it up, it sounded fine. But when I put load on it, it backfired and lost power. I pulled over and let her sit for about five minutes. She started right up but kept doing this on me most of the rest of the way home. By the time I got home, it had gotten a little better and was only doing it once in a great while and without the loss of power. When it lost power, it was very abrupt, jerking me back and forth. Last year, I replaced the fuel pump and lines inside the tank due to the holes in the gas line issue and it has been running good till this. I read a few posts about loose electrical connections and such while doing my homework first. :s My battery is connected well and there is no corrosion or anything. Anyone have some things they think I should look for or check? It also sounded like the exhaust might have been a little louder than normal and I noticed some popping on decel that I don't normally have.