exaust squeel?!?! - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 01-21-2011, 04:05 PM Thread Starter
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exaust squeel?!?!

hows it goin! so i have this problem. i posted it in the excursion forum and got a couple replies but i thought if i post it in this forum it might get more looks and replies. I have an 03 excursion w the 7.3 and it has a superchip programmer air rade intake and straight exaust. when i get past half throught in boost the exaust will make like a squeeling sound like a valve is opening in the turbo system or something and am at a lose for what it is. i am checking what replies i have but need more help. thanks.

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post #2 of 10 Old 01-21-2011, 04:07 PM
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.....wha... like surge? or like the EPV operating?

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post #3 of 10 Old 01-21-2011, 04:41 PM
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sounds like you either need a new muffler bearing or its just the turbo spooling. or possibly something with the EBPV maybe.
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post #4 of 10 Old 01-21-2011, 04:55 PM Thread Starter
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no its not a surge at all it just makes a squeeling sound like ur squeeling tire but ur not. bgut its only at a certain rpm that it comes in and goes out. its the weirdest thing. i have never heard of anybody elses doing this and i know alot of people w 7.3 diesels. it works just like a valve is opening and closing.

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post #5 of 10 Old 01-21-2011, 04:59 PM Thread Starter
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i forgot to mention that if i turn the programmer off it dosnt make the sound as loud. it gets louder when the programmer is on. i am sure it has to do with the with the amount of boost i push through it.

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post #6 of 10 Old 01-21-2011, 05:22 PM
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What is the ambient temp? My truck will literally whistle at around 1500rpm's when the EPV is active. It seems to only do it when it's below 30 and when I apply more throttle it goes away.

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post #7 of 10 Old 01-22-2011, 03:54 PM Thread Starter
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it will make that noise no matter what temp it is but it does come in around that rpm when in boost.it will get louder the more boost i push

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post #8 of 10 Old 01-22-2011, 08:44 PM
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would it be about the same time your wastegate is opening? could be blowing boost through a mostly sooted port?

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post #9 of 10 Old 01-23-2011, 02:59 PM Thread Starter
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could be it sounds like that is a good spot to start is the wastegate and ebpv.

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post #10 of 10 Old 01-23-2011, 03:23 PM
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Are you sure it's in the exhaust? Could it not just be the turbo spooling? I know mine screams pretty loud at 12 psi and up, course I have a WW.

2001 F-250, CCSB, 4x4, Auto, AFE II, DP-Tuner 60T, 80E, 120R, 140A, 4" exhaust
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