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howling noise???

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Old 03-18-2009, 11:59 AM
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Default howling noise???
when i start my car sometimes it makes a howling noise for about 20 sec then goes away. i was wondering what it was. any opinions?thx
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Old 03-18-2009, 12:10 PM
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I'd it a violent howl or a intake howl?
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Old 03-18-2009, 12:24 PM
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might be your AIR pump?
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Old 03-18-2009, 12:31 PM
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ABS pump?
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Old 03-18-2009, 12:33 PM
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Originally Posted by P pumped cummins
I'd it a violent howl or a intake howl?
its not really violent but its loud enough to hear it pretty well.
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Old 03-18-2009, 12:35 PM
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my friend has the same problem with his ss and he said it might be the water pump? is that right? is there any computer thing that i could hook it up too so that it could tell me the problem forsure?
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Old 03-18-2009, 12:42 PM
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Try getting a video
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Old 03-18-2009, 12:51 PM
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The water pumps on these are cam driven. On my lt1 it made a loud wine every time the thermostat opened
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Old 03-18-2009, 12:54 PM
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Originally Posted by P pumped cummins
The water pumps on these are cam driven. On my lt1 it made a loud wine every time the thermostat opened

so do you think that it is my water pump?
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Old 03-18-2009, 01:01 PM
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Or you have a loud steering box but that would be all the time
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Old 03-18-2009, 01:09 PM
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is there anything that i can hook my car up to see what the exact problem is? like would anybody know if the dealership might have something?
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Old 03-18-2009, 01:52 PM
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its your air pump man. thats why i removed mine
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Old 03-18-2009, 02:25 PM
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To see if it's the air pump just pull the AIR PUMP fuse under the hood and see if it stops. It'll probably throw P0412 and the SES, but after replacing the fuse it'll turn off after a few cycles.
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Old 03-18-2009, 02:38 PM
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Originally Posted by twitchtwice
its your air pump man. thats why i removed mine
kinda of a dumb question. but what does the air pump do exactly?is it for sure my air pump? or can it be my power steering?
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Old 03-18-2009, 02:39 PM
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Originally Posted by 2001NBMZ28
To see if it's the air pump just pull the AIR PUMP fuse under the hood and see if it stops. It'll probably throw P0412 and the SES, but after replacing the fuse it'll turn off after a few cycles.
the noise doesnt happen all the time. just once in a while. and when it does its only for about 20 sec.
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Old 03-18-2009, 02:50 PM
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Just something to check/eliminate it as the possible cause. Pump usually runs on cold starts, is that when it happens?
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Old 03-18-2009, 02:57 PM
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Originally Posted by 2001NBMZ28
Just something to check/eliminate it as the possible cause. Pump usually runs on cold starts, is that when it happens?
when it does happen its mostly on cold starts. but once in a while itll happen after like 50 min of sitting.
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