1994 Nissan Pathfinder high-pitched whistling sound

1994 NISSAN PATHFINDER
75,000 MILES • 4 CYL • 2WD • AUTOMATIC
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1994 Nissan Pathfinder mileage: 75,000. I noticed a high-pitched whistling sound coming from the right rear of the car this morning. It seemed to come and go. What could this be a symptom of?
Nov 9, 2010 at 7:29 PM
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It may be a fuel pump about to fail. They sometimes will make noises before they fail completely.
Nov 9, 2010 at 7:30 PM