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Whistle

Tiny
WANABE
  • MEMBER
  • 2001 BUICK LESABRE
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 63,000 MILES
Give gas hear whistle sound and a little shaking along with it at time. Let off no noise no shake I cannot hear nothing of a air vacuum or anything at idle, even with my hearing aid turned up, Also changed master cylinder and rear caliber. Yes, bench bled master cylinder, pedal bleeds off.
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Wednesday, August 30th, 2017 AT 7:10 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,454 POSTS
Whistle could be an air leak in the intake air duct from the air box to the throttle body. Shaking would be lean misfires if that is the case.
Or it is possible it's an exhaust issue, partial blockage could cause a whistle as well.

Pedal bleeding off could be a second bad master cylinder. I have had to go through two or three on some vehicles because they just do not care when they rebuild them anymore.
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Wednesday, August 30th, 2017 AT 7:48 PM

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