What is this sound with the turbo? - Ford Powerstroke Diesel Forum
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Old 02-13-2011, 07:07 PM
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What is this sound with the turbo?

It sounds normal before around 1600 rpms but then when i stop putting the pedal down and just keep a constant speed it starts to spin faster and hiss really loud. It doesnt sound like this is normal if i gas on it or let off the pedal it sounds like somthing closes and goes back to normal. Any possible ideas?
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Old 02-13-2011, 07:14 PM
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also have a video but cant figure out how to upload it hard to explain the sound... anybody know how to get the vid on here
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Old 02-13-2011, 07:22 PM
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sound starts after turbo spools up around 5 or 6 seconds
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Old 02-13-2011, 08:27 PM
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Winter Operation, Hard Starting, Hissing Sound Etc...



Winter Operation, Hard Starting, Hissing Sound Etc...
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Old 02-14-2011, 04:27 AM
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Doesnt do it until it gets warm though
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Old 02-14-2011, 05:02 AM
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Its your exaust back pressure valve opening and closing the same thing happened with my truck. its supposed to do it but if u wanna fix it unplug the sensor underneath the turbo.
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Old 02-14-2011, 05:07 AM
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Quote:
Originally Posted by powerstrokefan1 View Post
Its your exaust back pressure valve opening and closing the same thing happened with my truck. its supposed to do it but if u wanna fix it unplug the sensor underneath the turbo.
Thanks any negative things happen if I unplug it?
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Old 02-14-2011, 06:02 AM
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nope mines been unplugged for a year no codes to truble warming up i think the sensor is useless
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Old 02-14-2011, 08:16 AM
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thanks for the help
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