whitec4vette Posted June 12, 2008 Report Share Posted June 12, 2008 Hello, My mother has a 1991 Caddy Deville and has been running perfect for years. In the last month she started complaining about a vibration that no one else could sense, and now it has gotten worse. with such a broad range of potential issues, I thought i would start here and see what you can come up with. After driving the car for long periods, hours or so, the car will begin to shudder when you accelerate. If you let your foot off the gas, the car will regain its smooth ride. As soon as you accelerate again the car shakes. It won't shake when your are coasting, and it does it no matter what speed you are traveling. The car still shifts smoothly, but there is that quite obvious shaking that begins. We thought it was spark plugs so we got a tune up and still nothing improved. Please help us ASAP, Mother loves and needs her car back! Walter Link to comment Share on other sites More sharing options...
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