Whirling Noise - Ford Powerstroke Diesel Forum
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Old 02-05-2008, 04:09 PM
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Whirling Noise

Here is the problem that I am encountering with my 96 PSD. When the temperature gets below about 40 degrees, it will make a whirling noise. I have read about this in the past, it that seems to be normal operating procedure. Once the truck has warmed, it is suppose to subside? Anyway, even after driving for a while, about 15 minutes on the interstate, the truck still makes it's whirling noise, but only when I am not in the accelerator. My thoughts on this problem were that the temperature gauge, which even after a 6 hour straight drive from Iowa a month ago, never reaches normal temperature. Because of this I was thinking that the can not properly communicate with the computer and tell it that the engine is warm. I am still in the learning stages with diesels, so if someone can help, it would be greatly appreciated.
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Old 02-05-2008, 04:14 PM
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It's your EBPV, exhaust back pressure valve. Obviously it's sticking even after warming up and alot of people just disconnect them. I haven't done mine yet so i don't know how. Hopefully someone will chime in and tell ya how.
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Old 02-05-2008, 04:41 PM
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there was another guy today that might have had the same or similar problem, he called it a howling noise. I am going to give it a bump so you can check it out.
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Old 02-05-2008, 04:52 PM
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Mine will also stay on going down the road if i let off the pedal. I have a pyro gauge and you can watch the egt's spike at about 900 and then when the engine temp gauge reaches its proper temp the wooshing noise goes away and the egt temp will drop back down to around 600. Sounds like maybe your engine isn't warming up properly like mayeb a bad thermostat. Which is then causing the ebpv to close to try and help warm the engine. You can take off the ebpv sensor and try cleaning it along the the tube that runs to it. Heres a pic of it on my 01. Hopethis helps ya!

[IMG][/IMG]
Heres where it belongs. The sensor is right behind the serp belt, on top of the water pump.
[IMG][/IMG]
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