Mechanics

SPEEDOMETER JUMPS BETWEEN 20 AND 40 WHEN STOPPED

2002 Ford Taurus • 100,000 miles

The speedometer jumps between 20 and 40 mph when stopped. My blinkers also blink double time when the speedometer does this. Also, when I turn my lights on, the car speeds up, and shudders like it is going to die. It does not do this every time, and it just started today.
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Jessy
May 5, 2012.




Check battery cables and all grounds around the battery. Sounds like a bad ground issue

Roy



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