I have tried searching and come up with the same things. I am now getting my high rpm bucking back and it is making me want to sell this thing. 3rd,4th and 5th gear especially. I have just changed my spark plugs and set my timing to 12 degrees. It stopped for a week and today it started back today. I am going to the dyno in two days and don't want to waste my money if I am not going to get the results that I want with a messed up car. Do you think that when I get the dyno tune that they will not have a problem fixing the higher rpm bucking with the tune? I mean they get on it in like 3rd or 4th gear and if it is bucking it will not get correct number readings and they will not be able to tune it correctly, right? I am so pissed and am about to sell this piece of crap. I read about people who get a dyno tune and it just feels like a different car. I hope that is what it is going to be for me. I don't know anymore...