If it's not one thing then it's another. I took my CJ7 wheeling a month or so ago and have not driven it since. When I parked it the idle was really rough. I had to drive today and the idle was so bad that I stopped on the way to work and had a quick tune-up done to set the idle. Well, now that idle was fixed I noticed a new problem. Under acceleration the whole jeep vibrates like crazy. It only really seems to do it in 2nd and 3rd gears. It's pretty bad. I check the firing order just in case. Any ideas out there? I check my driveline to make sure that it was not dented. It is fine. The part I have a hard time exlaining is how it does not vibrate in 1st gear. I can be in 1st doing 30mph, shift to second and boom-vibration. Any ideas? I sure could use some help!