I know this subject has been hashed and re-hashed, but I did a mod today that you should consider if you have the steady throttle stutter. I did a search on here about it after becoming thoroughly frustrated, I discovered that by unplugging the TPS and disabling the ACV, it seemed to alleviate the stutter. JD has written about it extensively. I have been on the boards for over a year, and I must have missed it when it was up...anyway, try it, ....you'll like it!! rekless PS...you can do a search on the "jetting" forum for TPS and ACV.