2001 Mercury Cougar Turn On Car Imediatly Starts Rev High Between 2000 2500 Rpm

2001 MERCURY COUGAR
145,000 MILES
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When I turn on the car it imediatly starts to rev high it goes between 2000 and 2500 rpm and consequently when I shift to drive or reverse it make the car jerk. What should I check, could be a sensor or a vacuum, or a throttle problem?
Mar 15, 2013 at 8:44 AM
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ASEMASTER6371
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make sure no vacuum lines are off or broken.

the idle air control motor may be bad if all else is good

is the check engine light on??

roy
Mar 15, 2013 at 11:10 AM
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