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Metallic vibration

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Old

Jan 4, 2001 | 03:48 PM

#1

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Joined: Jan 2001

Posts: 315

Likes: 0

From: Vancouver, BC

Metallic vibration

Recently I noticed my Firebird has a metallic hollow sounding knock/vibration, kind of like a low-pitched ringing. It only happens at 1400 rpms when the car is moving and I press the gas a bit and it has to be above 2nd gear. It does not vibrate when the car is stopped and I rev it with the clutch disenganged (maybe cause I can't get it to stay at 1400 rpm). It does this when the car is cold and warm.

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'90 Red Formula Firebird
305 TPI 5-speed
TB Bypass, Ported Plenum

Old

Jan 4, 2001 | 04:10 PM

#2

Supreme Member

Joined: Jul 1999

Posts: 18,457

Likes: 16

From: Loveland, OH, US

Car: 4

Engine: 6

Transmission: 5

That sounds like the heat stove thing around the exhaust manifold is loose.

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"So many Mustangs, so little time..."

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