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  #1  
Old 01-15-2009, 05:09 PM
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Hissing Noise

I have done some mods -- including a 4 inch TB exhaust and a DP chip. Now that it is cold out (10 degrees right now) not only can I hear the turbo whine -- but I also hear what I think is the waste-gate hissing -- until it warms up (like 3 or 4 miles of driving). Is this normal? Was this happening before but I just couldn't hear it?
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Old 01-15-2009, 05:10 PM
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Thats your EBPV staying shut to warm up your truck. They suck and no one seems to like them!
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Old 01-15-2009, 05:10 PM
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Its not the wastegate, you never hear that. What you are hearing is the EBPV, Exhaust Back Pressure Valve. Its a butterfly valve in the exhaust right after the outlet of the turbo that closes when the engine is cold to aid in warmup. Also makes a nice exhaust brake with some wiring.
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Old 01-15-2009, 05:11 PM
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Quote:
Originally Posted by RRonning1984 View Post
Thats your EBPV staying shut to warm up your truck. They suck and no one seems to like them!
I like mine.
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Old 01-15-2009, 05:13 PM
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Originally Posted by cob32187 View Post
I like mine.
I stand corrected.

Do you have a link or a write up on how to do the exhaust break mod?
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Old 01-15-2009, 05:16 PM
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Yeah, i actually drew up a schematic for it. Im not sure if it's in the tech files or not. If you want it i can give you a copy of it though.
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Old 01-16-2009, 02:27 PM
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Originally Posted by cob32187 View Post
Yeah, i actually drew up a schematic for it. Im not sure if it's in the tech files or not. If you want it i can give you a copy of it though.
Got a link?
I was looking at the Dfuser kit , they seem to be nice but how well does it work for an exhaust brake? Is the Converterlock required?
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Old 01-16-2009, 02:35 PM
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I liked mine till the accuator started to leak.
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Old 01-18-2009, 03:19 PM
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Originally Posted by Midwestern4x4 View Post
Got a link?
I was looking at the Dfuser kit , they seem to be nice but how well does it work for an exhaust brake? Is the Converterlock required?
Works pretty good. If you don't have tuning that keeps the TC locked when you push the brake, you will need to wire up a lockup switch too.
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Old 01-18-2009, 04:07 PM
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i hated and unpluged my EBPV. i have TB 4" as well...no muff. no res....once it got cold mine would do it..very loud and annoying...there is a small plug right by the turbo..pull it out and tuck it in somewhere out of the way..and then just let the truck warm up a little longer when cold...
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