What is the Hissing noise??? - Ford Powerstroke Diesel Forum
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Old 02-12-2012, 09:10 AM
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What is the Hissing noise???

I have a 01 7.3 only mods are a AFE intake and a 5'' MBRP straight turbo back system. this winter in new england has been mild but we have had a few cold mornings. My truck starts fine if i keep it pluged in when it idles it has a crazy hiss through the exhuast if you hit throtte it goes away it only does it when its below like 20 or so. how can i corect it???
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Old 02-12-2012, 09:13 AM
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EBPV. Usually closes to help warm up the truck.
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Old 02-12-2012, 04:45 PM
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Me too

My 7.3 does the same thing when anywhere below 30f. Only after 10 minutes do I get the turbo back.
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Old 02-12-2012, 04:48 PM
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There is a sticky or two for this :
Winter Operation, Hard Starting, Hissing Sound Etc...
Troubleshooting GPR & GP's
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