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noise when hitting throttle

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Old Sep 2, 2012 | 01:27 PM
  #1  
Wayne91rs's Avatar
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noise when hitting throttle

1991 camaro z28 carbed v8. There's a noise coming from the front of the car when I step on the throttle and the car moves. But when I take my foot off the gas and the car coasts it goes away. The noise sounds like its coming from the engine area. It sounds like a whirl and gets faster as the car goes faster but again when I lay off the gas it goes away. Any ideas? Thanks for the help!
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Old Sep 2, 2012 | 01:31 PM
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mmadden55's Avatar
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From: Houson
Car: 86 Firebird
Engine: 305 SBC
Transmission: 700 R4 TCI
Axle/Gears: 3.42
Re: noise when hitting throttle

No idea, I would need to hear it. I suggest you take an experienced mechanic for a ride.
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Old Sep 2, 2012 | 02:17 PM
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From: St.cloud fl.
Car: 90RS Conv.
Engine: 383 w/ small shot
Transmission: th400
Axle/Gears: moser 9in
Re: noise when hitting throttle

Do you gave a mechanical fan or electric?
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Old Sep 2, 2012 | 02:27 PM
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Re: noise when hitting throttle

Mechanical fan
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Old Sep 2, 2012 | 02:46 PM
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From: St.cloud fl.
Car: 90RS Conv.
Engine: 383 w/ small shot
Transmission: th400
Axle/Gears: moser 9in
Re: noise when hitting throttle

Is it a clutch fan or flex. The flex fans do tend to whir. If its a clutch fan, check the clutch. It could be locked up
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Old Sep 2, 2012 | 02:48 PM
  #6  
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Re: noise when hitting throttle

It's a non clutch mechanical fan.
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Old Sep 2, 2012 | 04:24 PM
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From: St.cloud fl.
Car: 90RS Conv.
Engine: 383 w/ small shot
Transmission: th400
Axle/Gears: moser 9in
Re: noise when hitting throttle

Do you have any bent blades. Anything in or around the shroud that could be vibrating?
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Old Sep 2, 2012 | 04:31 PM
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From: St.cloud fl.
Car: 90RS Conv.
Engine: 383 w/ small shot
Transmission: th400
Axle/Gears: moser 9in
Re: noise when hitting throttle

Without hearing the noise those are my best guesses. It could be a alt going out. A water pump going bad a. A power steering pump that's low on fluid. Air pump squealing. So on and so forth
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