On my 2002 jetta wagon 1.8t It has been idleing a little rough, so I removed and cleaned out the throttle body. Followed instructions and turned key on too allow for alignment
. No high pitched sound was heard to indicate it was adjusting. Started car and it runs but shakes very much. Drove for ten minutes and the engine learches alot. No trouble lights are on. What happened? Any help would be great.