2003 Ford Explorer On Cold Morning Starts Engine Begun Lurching Audible

2003 FORD EXPLORER
160,000 MILES
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on cold morning starts the engine has begun "lurching", an audible, cyclical revving up and down noise that rocks the whole truck- as if I were quickly pulsing the accelerator. Stops as soon as I get above 5 mph. Seems to run fine otherwise. What could this be and does it warrant a visit to my mechanic?
Dec 16, 2012 at 5:42 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
is the check engine light on???

could be a vacuum leak or a bad idle control valve.

it will warrant a visit to track down the exact failure

Roy
Dec 16, 2012 at 6:31 AM
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