1987 Pontiac Firebird HUMMING NOISE

1987 PONTIAC FIREBIRD
100,000 MILES • V8 • 2WD • AUTOMATIC
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KRISTISCAR
  • MEMBER
  • 1 POST
WHEN I TURN THE CAR ON AND IT IDOLS FOR ABOUT 10 TO 15 MINUTES IT STARTS MAKING A LOW HUMMING NOISE THAT COMES FROM THE REAR OF THE CAR. IT DOES THIS WHEN THE CAR IS IN PARK AND WHILE I AM DRIVING IT. IT DOESN'T SOUND LIKE THE DRIVE SHAFT, BUT I AM NO EXPERT. COULD YOU RECOMMEND ANYTHING FOR ME TO LOOK AT THAT MIGHT NEED TO BE REPAIRED. OH ALSO I PUT 2 NEW FUEL PUMPS AND CHANGED THE GAS LINES. THE CAR WAS SITTING UP FOR ABOUT 6 YEARS AND I NEVER HAD ANY PROBLEMS WITH IT AT ALL UNTIL NOW.

THANKS

RALPH
Feb 3, 2010 at 4:36 AM
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TOOOMANYTOYS
  • ✓Experienced Mechanic
  • 513 POSTS
Is the fuel pump an after market pump? Sometimes they are more noisey than others. Best way to check would be to have vehicle running when noise is present. Remove the fuel cap and listen to see if louder inside the tank.
Feb 3, 2010 at 4:45 AM
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