No Problems

[SVX10]

Friday night I got an error code from my SVX. I didn't catch the whole code. About 3 night before that, I got a check engine light, but it went off quickly. Since I have only 400 miles left on my warranty, I figured I'd just have them fix it....THEY FOUND NOTHING! I had them do the full diagnostic check. It took them forever, so I figure they looked at a bunch of stuff. They've been really good with service, so I have to rule out incompetent mechanics. Also, when my car is cold and I accelerate, it jerks through the low RPM's then goes fine. Anybody have any ideas what could be wrong? The mechanic said it's running great, so I don't know what's up. I was gonna have my throttle body/injectors/valves cleaned to see if that fixed it. Anybody done this? If so, did it make any sort of difference...do you think it is worth it? Any help is greatly appreciated. If you don't want to help, please don't tell me why you don't want to help, just don't say anything.
Mat