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Q: Engine runs rough on 2001 Ford Windstar

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My car runs rough and sounds like it has an exhaust leak. The engine light flashes while the car is running. I've been told that means a cylinder is not firing or the knock senor(?) is bad. All I know is the car runs terrible. Any help would be appreciated.
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Hi, this is indicating a misfire (cylinder not firing). This can be caused by a bad spark plug, ignition wires, cap and rotor, fuel injector, vacuum leak or an internal engine problem. The important thing is not to drive your van when it is running like this, you will damage the catalytic converter, which can be very expensive.
Rear more about this issue here:
Have the problem diagnosed to know for sure what the cause is.
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