I recently had a new heater core installed on a 2006 Lincoln Mark LT and now when I try to drive it, it cuts off on me once i get out of the driveway. It starts back up fine, but then cuts again seconds after I try to drive. When I start the car it idles fine. I could have it idling for 10 minutes plus and have no issues, but once I shift it into gear and begin to back out of the drive way it shuts down again. Help!

 

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2006 Lincoln Mark LT