Intermittent exhaust noise - Ford Powerstroke Diesel Forum
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Old 01-23-2007, 05:45 PM
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Intermittent exhaust noise

1999 7.3 powerstroke.
I have a fluttering/hissing noise (can hear in cab when driving) coming from the passenger side front of my engine. It sounds like exhaust.
It does not do this all the time. It is intermittent.
It will do at idle or just driving along.
If I crack the throttle it will stop, sometimes not right away.
Sometimes when I step on the throttle when it's happening, no power until the noise goes away.
Need advice.
Thanks
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Old 01-23-2007, 05:47 PM
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It also does not matter if engine is cold or hot.
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Old 01-23-2007, 05:55 PM
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Sounds like the EBP valve being closed. If it only happens on a cold start during cold air temps...its normal....if it happens all the time...then its not. Make sure to check your air filter too....
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Old 01-23-2007, 06:03 PM
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Air cleaner new.
It happens all the time.
Thanks for the help.
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Old 01-23-2007, 06:06 PM
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next time its NOT doing it...there is a two wire electrical connector under the turbo...on the front of the pedestal the turbo mounts on. Disconnect it and see if it comes back. If it doesnt...then the EBP valve is sticking shut.....you dont NEED the valve it just helps the engine warm up faster...

Is there any lack of power when there is the noise?? Could it be an exahust leak at all?? there are other options but this time of year the EBP valve is the most common...
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Old 01-23-2007, 06:17 PM
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Yes, a lack of power.
If it is not exhaust would it be air?
I had my girlfriend powerbrake the engine and put a load on it and I hear the noise from the front passenger side of engine.
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Old 01-23-2007, 06:19 PM
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sounds like its most definatley the ebp valve...with a lack of power too. you will either need to disconnect it and keep it open (easiest to do if you just disconnect it when its not acting up) or you could replace or rebuild the turbo pedestal....

Some also just gut the ebp valve entirely..and get rid of it...but thats quite a bit more involved...
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Old 01-23-2007, 06:19 PM
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I also do not hear noise coming from the turbo area.
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