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Weird noise from under the hood. What could it be?

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Old 04-04-2003, 09:03 PM
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Question Weird noise from under the hood. What could it be?

I was standing by my friends TA today and it as running and I heard a noise that sounded like a fuel pump, but it was under the hood. It quit and then a few seconds later it did it again. What could it be?
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Old 04-04-2003, 09:39 PM
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A.I.R pump maybe? Was the car cold? What year is it?
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Old 04-04-2003, 10:20 PM
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Originally posted by ZIPPERR
A.I.R pump maybe? Was the car cold? What year is it?
It is a 98. Not cold either.
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Old 04-04-2003, 10:53 PM
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AIR pump. It's normal.
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Old 04-04-2003, 10:59 PM
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Originally posted by Nathan1234
AIR pump. It's normal.
ya, But That only comes on when car is cold. I think?
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Old 04-04-2003, 11:38 PM
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Originally posted by ZIPPERR
ya, But That only comes on when car is cold. I think?
It definately was not cold. What is the A.I.R. pump?
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Old 04-04-2003, 11:44 PM
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Originally posted by TransAmLS1
It definately was not cold. What is the A.I.R. pump?
Doesn't that stand for air injecting regulater?
I think only 01-02 have this.

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Old 04-05-2003, 12:02 AM
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Pretty sure all years have them.
But maybe it was the A/C compressor, if the engine was not cold.
That's the only other cycling type of sound I can think of besides fans.
If his A/C sounds that loud, he should probably have it checked out.
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Old 04-05-2003, 12:47 AM
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Originally posted by Nathan1234
Pretty sure all years have them.
But maybe it was the A/C compressor, if the engine was not cold.
That's the only other cycling type of sound I can think of besides fans.
If his A/C sounds that loud, he should probably have it checked out.
It didn't sound like AC really. More like a fuel pump.
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Old 04-05-2003, 01:41 PM
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It sounds like it't the air pump. My 99 does the same thing right after start up wether warm or cold. runs longer when it's cold.
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