bad vibes, what did they do Options

[dingy]

what the hell did they do to my car . ok here is the scoop i took my car a 98 gxs in to get some things taken care of first my timming belt and balancer belt and a coulpe other things elce too. Like getting it alined and a wheel stud put in just your little things i could do but didn't want to. so here is what happened they finished my car about 7 hours later and when i got it back and started it up the thing iddled real rough. and i was not pulling the 17 Lbs of vac. on my boost guage only 11 so that told my the timming was off i took it back also but befor i could get turned around i noticed the car was real loud now like i had no muffler this happened all the way through the rpm range. i took it right back and they said they would get it first thing the next day and they did. It was off one tooth on the front cam and the vac went back up to the normal 17 lbs and the car was iddling better so i thought cool they got it right. well wrong there was still the loud noise through the whole rpm range and as you get up to 4 to 6 K rpms it gets real bad and loud i have stock exhaust so its not loud at all and it vibrates somthing horrable they say that it seams ok to them but this is not right i know my can and i am afraid to drive it for fear it will vibrate apart while i am driving so they have it again and will look at it monday . if any of you know why it might be doing this vibs i will be more that greatfull to hear it . i personal think that they didn't get the balanser lined up right. everything that i could see looked allright but i am not the best to ask about this which is the reason it was take in to the shop in the first place PLEASE help me if you can why the bad vibs