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Old 12-22-2009, 07:37 AM
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High pitch noise?

I have a high pitch noise coming from my engine compartment at high rpms and high boost. It recently started and has gotten worse since the other day when I upgraded to an extreme tune from innovative. My coolant level is good and doesnt seem to be overflowing. Does anyone know what could cause this? Please dnt say head gaskets . thanks for the help guys. Oh and im going on a 1000mile trip on the first so this is urgent.
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Old 12-22-2009, 07:58 AM
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as you say high pitch noise, describe further, does it sound like a screech? tea kettle? do you smell heavy exhaust in the cab?
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Old 12-22-2009, 08:54 AM
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Its not a screech and no exhaust smell. Kind of like a tea kettle or an extremely high pitch turbo wistle
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Old 12-22-2009, 03:02 PM
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I just drove my truck on the highway and got it up to a constant 2000rpm. I layed on it a little and the boost went to 29 and the noise popped up. I did it again and it happened at 29psi again. once I let out of it it immedialty stops. What could this be?
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Old 12-22-2009, 03:07 PM
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hole in boot maybe ??
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Old 12-22-2009, 03:09 PM
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sounds like you got a boost leak.
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Old 01-02-2010, 12:58 PM
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my truck is doing same thing it the sound is coming from the air box i mostly hear it when i let off the throttle or the auto trans shifts
it will be going in the shop next week for a check engine light ...code says its a bad exhaust pressure sensor i will have them check out the sound also
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Old 01-07-2010, 05:24 PM
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update ..... stopped by the dealer today and spoke to the diesel tech , he said that there is to much pressure in the coolant system he should know more by tomorrow ,,, i hope they get it fixed fast because i miss my truck
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Old 01-08-2010, 04:36 PM
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i don't know if anybody is still following this thread but i will update for the search engine

update


dealer called today , looks like it is a head gasket that is causing the issue ,, they said that the cant repair until 1-18 ... thats a long time to go without a truck
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Old 01-09-2010, 02:18 PM
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Does it do it a lot more the colder it is? Mine will do it going from 0-20 in a school zone just on the backside of a shift when it's really cold.

Once the truck is warmed up, it won't do it as much and primarily on a heavier throttle/increased boost.

Tea kettle is the best description.
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