Hissssss?
Thread Starter
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Tuned
Joined: Nov 2002
Posts: 286
Likes: 0
From: CENTRAL PA
Hissssss?
I have a 1995 350 PSD with a 4" exhaust and no cat.
I am getting this hideous hissing noise out the tailpipe.
I called the exhaust people and they sent me a new muffler, but it didnt fix it.
Exhaust made by Goerlich.
It actually bogs down when it is hissing. But a tap of the throttle gets rid of it for a while. Does it
only when running
at steady rate or decellerating.
Could it be the turbo?
I am getting this hideous hissing noise out the tailpipe.
I called the exhaust people and they sent me a new muffler, but it didnt fix it.
Exhaust made by Goerlich.
It actually bogs down when it is hissing. But a tap of the throttle gets rid of it for a while. Does it
only when running
at steady rate or decellerating.
Could it be the turbo?
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,242
Likes: 758
From: Houston, Texas
I don't think it could be your Turbo. It's more than likely your EBPV or Exhaust Back Pressure Valve sticking or not opening/closing properly. Thats the only explanation (to me) for the hiss from the exhaust.
Senior User
Joined: Nov 2003
Posts: 435
Likes: 0
From: NW
Sounds like the EBPV sticking. If I let mine warm up a few minutes in the morning, mine sounds like a jet engine back at the exhaust pipe once the exhaust back pressure valve closes. You could probably check it by just disconnecting the wires to it under your turbo and see if it acts the same.
Thread Starter
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Tuned
Joined: Nov 2002
Posts: 286
Likes: 0
From: CENTRAL PA
Three responses all the same! No doubt about it.
I am new to PSD but not to Ford. I have been Driving Fords all 30 driving years. I am learning about PSD, a lot here.
I am sending my son to Wyotech in Jan so he can teach me a few things.
One more question, Where is the valve and what does it look like?
Thank you very much for your help.
I am new to PSD but not to Ford. I have been Driving Fords all 30 driving years. I am learning about PSD, a lot here.
I am sending my son to Wyotech in Jan so he can teach me a few things.
One more question, Where is the valve and what does it look like?
Thank you very much for your help.
Senior User
Joined: Nov 2003
Posts: 435
Likes: 0
From: NW
You can, and many people do. Of course, by doing that you lose the ability to assist the engine at warming up. And if you have any warranty left, might not do it. I think it serves a good purpose. If mine fails, I think I will remove, and clean it first, and try to fix it. If that fails, I would probably replace it. But thats just me. 
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Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Since you're in PA you might want to leave it on for the cold winter starts. You can also wire it to work as an exhaust brake for about $20 worth of parts.
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