i had steeda u/d pulleys and had stock pulleys put back on and now notice a slight vibration that comes and goes only at idle. you can feel it in the steering wheel the most, but doesnt change if you move the steering wheel. it's almost harmonic. it's like a hhhmmmhhmmmmm hhhmmmm hhmmmm.is it poss that my tech didnt torque the crank pulley properly. i had the ford dealer listen to the noise and feel the vibration and they said it was normal. i only had my car stock for about 5-6k never noticed it, now has16k. any ideas? note: noise/vibration was there befor s/c was installed

 

come on... somebody has to have some ideas. does anybody notice this in there car?