HISSING EXHAUST - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 12-09-2007, 12:06 PM Thread Starter
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HISSING EXHAUST

I own a 2000 F250 7.3 - recentlly I have noticed a distinct "hissing" sound from the exhaust. I hear it when the idel RPM increases & at slow speeds around 1400-1600 RPM. When I step on it, it goes away. I am not experiancing any power loss. Any suggestions? (I'm in Michigan, 20-30deg)
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post #2 of 12 Old 12-09-2007, 12:12 PM
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It's the EBPV or exhaust back pressure valve. Helps with cold weather warm-ups. Once the motor is warmed up it should go away. If it doesn't your valve is sticking.

RICK


97 F350 CREW CAB 4x4, 7.3 TURBO DIESEL, DIY INTAKE , TW TUNES
GRAND ROCK POWERFLOW STACK KIT W/5" MITRES
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post #3 of 12 Old 12-09-2007, 12:24 PM
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I agree. Mine does it too. I actually bypassed the computer and put my EBPV to a switch.
When I need it I use it for either warming up or, when towing.

Jody in Mesa,Az
97' crew cab xlt, F350
7.3L PSD
Long Bed
2 wheel Drive
3 gauge pillar(egt,boost,trannytemp)
3" down pipe
DP Tuner
CAT Delete.
Tranny Rebuid ( 3 disk TQ, extra clutches, all billet steal internal parts, New HD Valve Body, 45,000 BTU cooler)


37' Avion 5th Wheel
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post #4 of 12 Old 12-09-2007, 12:35 PM
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Quote:
Originally Posted by jfines@cox.net View Post
I agree. Mine does it too. I actually bypassed the computer and put my EBPV to a switch.
When I need it I use it for either warming up or, when towing.
Functions as an exhaust brake... inexpensive and works pretty well above 2,000 rpm's!

2001 F250
11.62 @ 115.79
Owner of Marty's Diesel
Elkton, Maryland
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post #5 of 12 Old 12-09-2007, 12:40 PM
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how do u by pass it

08 f250 xlt
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post #6 of 12 Old 12-09-2007, 12:50 PM
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I bought a set up off of ebay. It has relay's in it for when I hit the go pedal, it turns off.

All you really need to do is cut the wires coming of of the valve (located at the turbo) and then run them to a toggle switch that has a 12v power supply.

There is a write up in the DIY section. Just beware that the more you use it, the more chances you have of the valve sticking. As long as you keep that in mind, your all golden.

One day I will be able to remove mine and buy a real engine break. They will pull all the way down to 1000 RPM's. The EBPV is only good above 2000. I still wouldn't tow with out it, now that I got it.
I attached a picture that shows my 14,000 LBS 5er.
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Jody in Mesa,Az
97' crew cab xlt, F350
7.3L PSD
Long Bed
2 wheel Drive
3 gauge pillar(egt,boost,trannytemp)
3" down pipe
DP Tuner
CAT Delete.
Tranny Rebuid ( 3 disk TQ, extra clutches, all billet steal internal parts, New HD Valve Body, 45,000 BTU cooler)


37' Avion 5th Wheel
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post #7 of 12 Old 12-09-2007, 06:12 PM Thread Starter
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So if I can't get to the fix right away, what is the harm that is can do sticking?? (I have two days of towing in front of me,, have to use the truck if you know what I mean...) THANKS
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post #8 of 12 Old 12-09-2007, 06:14 PM
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Wont hurt anything other than your fuel economy on your trip

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2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
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post #9 of 12 Old 12-09-2007, 06:29 PM Thread Starter
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So with a sticking EBPV, is that acting as an engine break while I'm driving? I think I have been getting poor miliage lately, but haven't checked it, and at $3.59 a gallon,, I better have it running good. THANKS
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post #10 of 12 Old 12-09-2007, 06:34 PM
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Quote:
Originally Posted by conecraft View Post
So with a sticking EBPV, is that acting as an engine break while I'm driving? I think I have been getting poor miliage lately, but haven't checked it, and at $3.59 a gallon,, I better have it running good. THANKS
It pretty much is yes

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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