hummin or buzzing sound
11-16-2014, 09:30 PM
#1
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Car: 89 RSt-top
Engine: 2.8 mpfi
Transmission: auto
hummin or buzzing sound
Hey everyone. Noticed this sound a few times now. If u rev the car up 89 2.8. U get a humming or buzzing sound comming from the engine compartment. Sometimes this sound starts to happen just before u let off the gas. Not sure what it is.
11-18-2014, 10:14 AM
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Car: 1987 Pontiac Firebird Standard
Engine: 2.8L V6
Transmission: Automatic
Re: hummin or buzzing sound
Does it have a metallic ticking mixed in with the noise too? It is most likely a bad bearing on one of the belt pulleys. If you have AC, that is typically the most common bearing to go, but it can be any of them, like your water pump, tensioner, etc.
01-17-2015, 01:54 PM
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Car: 1986 Camaro Sport
Engine: 2.8L
Transmission: Auto
Axle/Gears: Stock
Re: hummin or buzzing sound
Also check the wires in the fan relay connector. My 86 had bare wires there and made a buzzing sound randomly.
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