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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.