Hissing noise???
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Senior User
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From: Southern WV
Hissing noise???
Hey guys, 95 F350 PS
I am hearing a hissing noise coming from the turbo area at idle, it also has an exhaust leak that I cannot find. The hissing noise also occurs while driving when you let off the gas and at the beginning of acceleration. I am hoping the noise and leak are from a blown gasket??? How much trouble to take turbo off?? I would also like to change the exhaust manifold gaskets, the pass. side bolts look pretty bad, any secrets as to easiest way to remove manifolds???
Thanks in advance for any help
Randy
I am hearing a hissing noise coming from the turbo area at idle, it also has an exhaust leak that I cannot find. The hissing noise also occurs while driving when you let off the gas and at the beginning of acceleration. I am hoping the noise and leak are from a blown gasket??? How much trouble to take turbo off?? I would also like to change the exhaust manifold gaskets, the pass. side bolts look pretty bad, any secrets as to easiest way to remove manifolds???
Thanks in advance for any help
Randy
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From: Herndon KY
I believe that you are describing the operation of your exhaust back pressure valve. There is a 2 wire connector at the base of your turbo, disconnect that plug and your hissing problem should go away. Some of us use this EBPV as an exhaust brake. If you would like the instructions to change it let me know I will post a link.
Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
here is a thread that is your problem. For the exhuast parts unless you can see black soot its not leaking and i wouldn't touch it until is does.
Also by your sig do you have a Centurion 4 door bronco with the PSD? If not never mind. If you do, do you have any pics of it. Them babies are sweet!
Also by your sig do you have a Centurion 4 door bronco with the PSD? If not never mind. If you do, do you have any pics of it. Them babies are sweet!
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From: Southern WV
I have two '95 350's, and my other one does not make this hissing noise. Is it possible it does not have an EBPV? There has to be an exhaust leak, I can hear it and smell it in the cab when driving. just can't find it.
tjbeggs, yes it's a Centurion 4 door Bronco, and yes this baby is sweeeeet! I have wanted one for years and came across this one in NC about 6 months ago. 1995 F350
PSD, auto, all the bells and whistles except leather, 83,000 miles. Looked like it was garage kept. Couple of small easy fix blemishes, but otherwise perfect. No I do not have pics yet, but will post some soon. Had intended to have them posted by now, but just haven't gotten round toit. I also have a 95 F350 crew, PSD, 5sp, duelly with the Centurion package. Just got it 2 wks, this is the one with the problem, other than that a good truck. will post some pics of it also.
tjbeggs, yes it's a Centurion 4 door Bronco, and yes this baby is sweeeeet! I have wanted one for years and came across this one in NC about 6 months ago. 1995 F350
PSD, auto, all the bells and whistles except leather, 83,000 miles. Looked like it was garage kept. Couple of small easy fix blemishes, but otherwise perfect. No I do not have pics yet, but will post some soon. Had intended to have them posted by now, but just haven't gotten round toit. I also have a 95 F350 crew, PSD, 5sp, duelly with the Centurion package. Just got it 2 wks, this is the one with the problem, other than that a good truck. will post some pics of it also.
Posting Guru
Joined: Nov 2006
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From: Herndon KY
it is possible that the sensor that regulates the pressure is plugged or not functioning, and of course it could be an exhaust leak, that is just not near as common, especially this time of year
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Senior User
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From: Southern WV
where is the sensor located and can it be cleaned? if it is not the sensor, then what is making the hissing sound? I still believe it has an xhaust leak because you can hear it when the motor is under load going up hill,etc and you can smell it in the cab. but still no signs of carbon that i can see.
tjbeggs, in your last message you said "here is a thread that is your problem", i'm a newbie so this may be a dumb ? but where is the thread?
tjbeggs, in your last message you said "here is a thread that is your problem", i'm a newbie so this may be a dumb ? but where is the thread?
Post Fiend
Joined: Apr 2004
Posts: 12,835
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From: Silver Lake Dunes, MI
Darn it!! I always forget to post the links!! Not a dumb question just a dumb poster for forgetting the link!!
here it is
https://www.ford-trucks.com/forums/6...nge-noise.html
Unplug the EBPV from the thread and I bet your noise goes away.
here it is
https://www.ford-trucks.com/forums/6...nge-noise.html
Unplug the EBPV from the thread and I bet your noise goes away.
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Posting Guru
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From: Herndon KY
take the time to unplug the plug at the base of the turbo, good trouble shooting if nothing else, if that solve the problem then we can work on getting the sensor cleaned if you want to, if not we can start chasing a less likely line. Also make sure that the EBPV linkage is connected and holding the gate open.
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Thread Starter
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From: Southern WV
i'm new to the diesel world so bear with me. ok, if i unplug the EBPV and the noise goes away, what does that mean? and what is the fix? another thread refered to a dash switch?
is it possible that the noise and exhaust leak are connected?
why does one 95 make the noise and not the other? the one that does not make the noise is bone stock, doesn't look like anyone has fooled with anything, but i guess the EBPV could be unplugged. will check both when i get home.
thanks so far for the info!!
is it possible that the noise and exhaust leak are connected?
why does one 95 make the noise and not the other? the one that does not make the noise is bone stock, doesn't look like anyone has fooled with anything, but i guess the EBPV could be unplugged. will check both when i get home.
thanks so far for the info!!
Last edited by C350CREW; Jan 30, 2008 at 03:13 PM.
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From: Southern WV
OK, went home the other day and the noise was gone. the air temp was about 40, does air temp have anything to do with the EBPV? temp has been above 35 for last 4-5 days and the hissing is gone?????
Post Fiend
Joined: Apr 2004
Posts: 12,835
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From: Silver Lake Dunes, MI
The valve is functioning as it was designed to when its cold. BUT the design is poor and the EBPV does do it job very well. its supposed to help with faster warm-ups but without a high idle it doesn't do squat. I would unplug it and never look back.
Edit- This is one topic 2 stroke man and myself will never agree on. LOL
Edit- This is one topic 2 stroke man and myself will never agree on. LOL