No it is not a rotor, this noise is independent like a pump and does make the pedal vibrate. The noise can be heard sometimes when not braking as well. -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx]On Behalf Of clark thomas Sent: Friday, February 08, 2002 10:09 AM To: Elijah Scott; mailing-list@xxxxxxxxxxxxxxxx Subject: Re: IML: 92 is in garage-ABS ? >--- matthew Hopkins <mhoppy@xxxxxxxxxx> wrote: >> My Question- The manual says the ABS makes the brake >> pedal vibrate and it >> does it, not necessarily when hard braking. It >> almost seems like this could >> be front Air suspension which I thought the car >> didn't have. (It has rear I >> know) I will look for air in front, but is this the >> ABS and if so should it >> be making a noise and vibration for no hardbraking >> reason? > >Matt, > >Congratulations on your new Imperial! While the >'90-'93 Imperials don't have the appreciation (yet) >that many of the older Imperials do, they are still >excellent cars, especially when considered in the >context of the time period they were produced. > >At any rate, it soundse like your new Imperial may >simply have a front brake rotor that's out of round. >The ABS system will make the brake pedal vibrate, but >ONLY when the ABS system is activated (under hard >braking or conditions where one or more wheels slip or >skid). Otherwise, you should feel no vibration. > >A warped brake rotor will definitely cause a >vibration, especially under light braking conditions. >Fortunately, this problem is easily remedied by >"turning" the rotor or replacing it. With milage as >low as you car has, I would expect there's plenty of >metal left to allow the rotor to be turned. > >Best luck! > >Elijah > Might also be CV joints. Check the rubber boots. If they are bad, a real easy fix.