fastb18c1

i have a sc400 it when i turn it on it starts to shake, when i drive it it shakes, could this be the wires, plugs, selenoids, distributor it never shuts off it just shakes, anyone with the same problem b4

Gspec

Sounds like it's missing on one or more cylinders...When the last time you had a full tune-up? It could be any number of things, But I'd start by identifying which cylinder is misfiring and then make the determination as to what was the cause (plugs, wires, coils) Is the CEL on? If so you should stop by a shop or Autozone and get the code read as it will help point you in the right direction.