Ford Focus Forum, Ford Focus ST Forum - View Single Post - Speedometer jumps/bounces and car trembles/shakes
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Old 05-14-2007, 02:15 PM   #12
StupidZX3
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I replaced the plugs and wires also, about a day after that, the car threw a CEL on and started to shake even worse.. Turns out the coil was cracked... Replaced it, and the car runs perfect now, no more jerking of the speedometer or bucking of the car.
 
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