I'm getting a low to mid-range misfire. It's not a bog but a definite misfire. Only been on the sled 4 times due to dismal snow conditions. First ride it ran flawless then the second time out I noticed it happening slightly. Third ride it stated out minimal then became constant. Cruising at 5500 to 6000 RPM is where it is worst. Hammer the throttle and it pulls through it and hits peak RPM no problem. Idles fine as well. After the third ride I went straight to my dealer. He had it for several days. Checked out everything and ran it in the shop but couldn't replicate the issue. They suspected the throttle safety switch which they claim is very twitchy on these. They showed me where to unplug it to eliminate that as a possible cause and sent it home with me. Just took it out again and still does the same thing. This time I brought my stock muffler (was running an HPS) and also swapped that off to make sure it wasn't doing some weird stuff. Only other changes I've made are clutching with a Speedwerx kit and billet cover. Can't see how any of that could cause the issue so haven't reverted it back to stock yet and the dealer isn't concerned about it either. Ran it on my stand at home and runs perfectly but of course it's not under a load.
I just dropped it back off at the dealer this morning and they'll look it over once again. He basically said if they can't figure it out to take it out and run it till it pops a code or I guess blows up. Doesn't instill a lot of confidence. Wracking my brain thinking about what it could be....maybe TPS or stator? TPS might cause an issue in a particular band like that maybe. Any ideas out there?
