Noise???????? - Ford Powerstroke Diesel Forum
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Old 02-19-2007, 03:06 PM
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Noise????????

I'm having a problem with my truck. When my truck is cold I have a strange noise when i let off the accelerator. It almost sounds like a transbrake. It sounds like it is coming from the air box. Once the truck is warm if iI shut it down and let it sit for a 1/2 hour or so the problem is gone? Fire it up in the morning and its back? Truck seems to be running fine otherwise. Its a 96 f250 with 118212 miles. Any help would be great.
Thanks Martin
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Old 02-19-2007, 03:10 PM
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It is probably the Exhaust Backpressure Valve that aids in warm-up during cold weather. Look under the intake duct going into the turbo, you will se a 2 wire plug mounted to the compressor housing. The wires should be white with pink stripe and a black with purple stripe. Disconnect it and crank it when cold to see if the noise goes away.
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Old 02-19-2007, 03:19 PM
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Thanks Ill try that. The problem happen while driving is it ok to drive with it disconnected? Thanks Martin
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Old 02-19-2007, 03:21 PM
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Yes, you can leave it disconnected for now on, but if you feel you need the warm-up aid in the winter, just plug it back up. At least you will know what is making that sound.
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Old 02-19-2007, 03:22 PM
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Thanks alot i'll try it tomorrow. This site is great!!! Martin
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Old 02-19-2007, 03:26 PM
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BTW: Welcome to the Forum, Martin!
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Old 02-19-2007, 03:30 PM
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Thanks!!!!!!!!!!!!
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Old 02-19-2007, 03:41 PM
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I would say you just got some very good advice, and most likely the correct answer to your question. The only thing I have to add is:

Welcome to Powerstroke.org
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