Strange noise question - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 12-20-2011, 11:00 AM Thread Starter
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Strange noise question

Hello all
My 08 350 spartan tuned (250) sb intake truck has a intermitten sound in the exhaust at idle and under exceleration. Sounds like a blower of some sort comes on for a minuet or two and shuts off for a bit then comes back on. Im not sure what the egr does but is it that? Hasnt always done this. Started about a year ago.
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post #2 of 7 (permalink) Old 12-21-2011, 05:30 PM
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At idle that might be the EGR cycling. This is done to prevent it from sticking due to carbon build up.

2008 FX4 3:73 ZF-6 SC SB Transfer Flow
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post #3 of 7 (permalink) Old 12-21-2011, 11:48 PM Thread Starter
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Quote:
Originally Posted by pyro2nite View Post
At idle that might be the EGR cycling. This is done to prevent it from sticking due to carbon build up.
Thanks. What are the pros and cons of a egr delete? Truck sounds like a shop vac when it is on.
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post #4 of 7 (permalink) Old 12-23-2011, 06:27 PM
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Thanks. What are the pros and cons of a egr delete? Truck sounds like a shop vac when it is on.
The pros are, you will be eliminating the EGR coolers. A possible source of coolant leak. Cons, if your truck needs to be smoged, it won't pass.

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post #5 of 7 (permalink) Old 01-02-2012, 02:13 AM
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Is it the vanes of the turbo opening and closing?

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post #6 of 7 (permalink) Old 01-04-2012, 01:27 AM
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Is it the vanes of the turbo opening and closing?
No.......................

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post #7 of 7 (permalink) Old 04-16-2012, 10:13 AM Thread Starter
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Vaccume sound is getting louder and staying on. EGR stuck? Thinking of delete. No smog here.
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