Hissing noise after long pull over the mountain - Ford Powerstroke Diesel Forum
 
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post #1 of 6 Old 06-08-2011, 07:47 PM Thread Starter
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Hissing noise after long pull over the mountain

Hey all, my 05 6.0 liter is making a hissy noise when turned on, sounds like it's coming from around the turbo. Started happening after I pulled a boat over the mountain. My exhaust guy says it's not coming from the exhaust. He mentioned something about a waste gate not functioning?? It whistles pretty loud when taking off from a line as well. LIke a squealing air whistle if that makes sense. Any help is appreciated

05 EX Cab Short
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post #2 of 6 Old 06-08-2011, 08:15 PM
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Any work done to the truck recently?


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post #3 of 6 Old 06-08-2011, 08:58 PM Thread Starter
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Quote:
Originally Posted by NYC F-350 View Post
Any work done to the truck recently?
No not recently. Noticed the noise after a long pull. Only about 5000 pounds but I got the EGTs up to a steady 1050 and pushed 1200 once for about 10 seconds.

05 EX Cab Short
8 inch Fabtech
38 inch SSRs on 17x10 Centerlines(powdercoated)
SCT Innovative tunes
Banks CAI
Offroad MBRP Stainless 4.5 " and up pipe.
Auto Meter EGT, Fuel pressure, Trans Temp, Oil temp, water temp gauges.
Blue spring , bored 3 hole banjos.
ARP Studs
OEM Ford gaskets.
EGR Delete, cooler delete.
Bulletproof stand pipes
AMP Power Steps
Kicker Audio
Yukon 4.56 gears
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post #4 of 6 Old 06-08-2011, 09:30 PM
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Start looking for the telltale signs of an exhaust leak. My "internet armchair" guess is that your Y-pipe took the dirt nap. The flex joints on either side can split over time.
Look at the firewall behind those flex joints. Also check the clamps on the turbo and the EGR cooler (if that still exists) to see if they are ok, tight, and have no soot stains on them.
I disagree with your exhaust guy. It is an exhaust leak, just a well hidden, royal pain in the a$$ one to find.
If your truck is sitting still, at idle, can you hear the hiss intermittently or is it steady?

By the way, Tousley Ford (800) 328-9552 is where I got my new y-pipe for under 200 bucks to my door. Just in case you need one.
That same pipe priced at my local dealer? Over 600 bucks.


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post #5 of 6 Old 06-08-2011, 11:00 PM Thread Starter
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Quote:
Originally Posted by NYC F-350 View Post
Start looking for the telltale signs of an exhaust leak. My "internet armchair" guess is that your Y-pipe took the dirt nap. The flex joints on either side can split over time.
Look at the firewall behind those flex joints. Also check the clamps on the turbo and the EGR cooler (if that still exists) to see if they are ok, tight, and have no soot stains on them.
I disagree with your exhaust guy. It is an exhaust leak, just a well hidden, royal pain in the a$$ one to find.
If your truck is sitting still, at idle, can you hear the hiss intermittently or is it steady?

By the way, Tousley Ford (800) 328-9552 is where I got my new y-pipe for under 200 bucks to my door. Just in case you need one.
That same pipe priced at my local dealer? Over 600 bucks.
Very good info NYC, I appreciate it. I agree, I think it's exhaust. Yeah, when it's started nothing for about 3 seconds, then it's constant. Get's higher (hissing noise) when revved.

05 EX Cab Short
8 inch Fabtech
38 inch SSRs on 17x10 Centerlines(powdercoated)
SCT Innovative tunes
Banks CAI
Offroad MBRP Stainless 4.5 " and up pipe.
Auto Meter EGT, Fuel pressure, Trans Temp, Oil temp, water temp gauges.
Blue spring , bored 3 hole banjos.
ARP Studs
OEM Ford gaskets.
EGR Delete, cooler delete.
Bulletproof stand pipes
AMP Power Steps
Kicker Audio
Yukon 4.56 gears
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post #6 of 6 Old 06-09-2011, 06:15 PM
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Had the exact same problems with mine over the winter, went to go and replace the turbo this past weekend and cracked the y pipe more.
New one should be here this week

Tyler
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