My 2000 expedition with 120000 miles is shaking tremendously when accelerating. When the gas is not pressed it will be fine until i stop at a light or intersection it will then again just shake like crazy and continue when i accelerate off i have checked all fluuids and had an oil change about 1500 miles ago. any ideas?
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You should be showing the check engine light--take the car to Autozone or other such business and get a free computer scan (they will be happy to sell you any needed parts). The scan should pinpoint any fuel or ignition problems. Good luck!
Sounds like one of the coil over plugs have gone bad. this will cause mis-fire which causes your car to sputter, skip, and shake. It can be changed easily when finding out which one it is. But rather expensive for a simple part $40+ each.
It sounds like you may have a problem feeding the fuel to your engine, I had the same problem with my 89 RS. All the 1989 model's fuel systems were recalled. I think you may need a new fuel pump. The fuel pump is located inside the gas tank in the rear of the car right under the rear axle. The fuel pump itself isn't too expensive, but with other small parts such as the electrical harness upgrade and fuel filter and the labor you should be looking somewhere in the $500 range. I hope this helps.