EBV help
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Senior User
Joined: Aug 2005
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From: utah
EBV help
What can you guys tell me about a EBV. Correct me if I am wrong but I believe it stands for exhaust brake valve. I ran diagnostics and picked up an exhaust brake pressure sensor code and an exhaust pressure control valve code.(po470 and po478 respectivley) Is there some type of tube associated with this that can become plugged? I have heard bits and pieces about a tube that can get plugged and wondered if maybe I was having that problem. Truck seems to be missing at idle and has an occasional hiccup at cruising speed. If any of this makes sense to anyone and if anyone knows what I am talking about, can I get some tipps on the location of this tube and how to clean it out. I would really appreciate it.
Thanks, Elkarcher
Thanks, Elkarcher
Post Fiend
Joined: Jun 2004
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From: Parker, CO
It's the Exhaust Backpressure Valve. AKA: EBV or EBPV.
Yes there is a sensor that plugs into a tube, and this tube gets clogged with soot. The sensor sits on the front of the engine, just behind the idler pully. You'll see the sensor attached to a metal tube that runs all the way to the passenger's side exhaust manifold. Unbolt the sensor, and run a long wire brush through the tube to clean it out. Also, very gently clean the soot off the tip of the sensor. Put it back together and you're done. Hopefully that will fix your codes. If not, then the sensor is probably toast.
As far as having a miss at idle or hiccup at cruising speed, the EBPV will not cause this. If it's not functioning properly, it will cause a very sluggish truck, low boost, and high egt's. Sounds like you may have another issue with the hiccups. I'd suggest keeping a spare CPS handy, that might be what's about to go out on your truck.
Yes there is a sensor that plugs into a tube, and this tube gets clogged with soot. The sensor sits on the front of the engine, just behind the idler pully. You'll see the sensor attached to a metal tube that runs all the way to the passenger's side exhaust manifold. Unbolt the sensor, and run a long wire brush through the tube to clean it out. Also, very gently clean the soot off the tip of the sensor. Put it back together and you're done. Hopefully that will fix your codes. If not, then the sensor is probably toast.
As far as having a miss at idle or hiccup at cruising speed, the EBPV will not cause this. If it's not functioning properly, it will cause a very sluggish truck, low boost, and high egt's. Sounds like you may have another issue with the hiccups. I'd suggest keeping a spare CPS handy, that might be what's about to go out on your truck.
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Joined: Apr 2005
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From: Phoenix,N.Y
Don,t forget you may want to run a 7/32 drill bit in the exhaust manifold fitting ( By hand ). I had the same problem, I pulled the tube off, cleaned it by running wire back in forth through it. Then flushed it with parts cleaner and let it dry. The fitting the senser sets in is also a 7/32.
Post Fiend
Joined: Jun 2006
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From: Central, Al
I did mine at 80K, I wasn't having any issues but when looking at the backpressure PID it would start at 4-5psi and just slowly climb to 9 -10 psi under hard acceleration. After cleaning idle was 13-15 psi and WOT acceleration back to the 30's. It just lets the PCM get an accurate picture of engine load. I will probably clean it at 50K from now on but by no means is it necessary. If you notice the EBPV not opening when you step on the pedal when its cold or see a P0470 code a cleaning can fixit.
Tuned
Joined: Feb 2007
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Originally Posted by amiller93
If you notice the EBPV not opening when you step on the pedal when its cold or see a P0470 code a cleaning can fixit.
Knock on wood, but I can't even remember the last time a code reader was even hooked up to the truck. I hope it continues to stay trouble free.
Any links to clear pics of the EBPV components that get cleaned?
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Pocket posted earlier that a dirty/clogged ebpv tube and sensor could cause a truck to seem sluggish. I own a 02 F250 4x4 CC (my first diesel) and over the past year or so have driven a newer 3/4 ton duramax (05 I believe) and an 06 1 ton duramax dually both of them stock, Crew Cabs and 4x4 and they make my F250 feel like its powered by a briggs and straton rather than the almighty PSD.....Is this normal or should I be concerned?
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Post Fiend
Joined: Jun 2004
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From: Parker, CO
Spunout, the clogged ebpv would cause your truck to be sluggish while the engine is cold. If it's running poorly after it has reached NOT (normal operating temps), then something else may be wrong.
Also, comparing the older 7.3L to a newer Duramax or Cummins will make the 7.3L feel like a turtle. The newer engines from the factory have more hp and torque, newer technology, and will feel peppy. You can even compare a 6.0 to the 7.3L, and you'll feel the difference even if both of them are Fords. However, the 7.3L is a pulling beast, and it can hang with the newer engines with a nice load behind it.
Also, comparing the older 7.3L to a newer Duramax or Cummins will make the 7.3L feel like a turtle. The newer engines from the factory have more hp and torque, newer technology, and will feel peppy. You can even compare a 6.0 to the 7.3L, and you'll feel the difference even if both of them are Fords. However, the 7.3L is a pulling beast, and it can hang with the newer engines with a nice load behind it.
Post Fiend
Joined: Jun 2004
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From: Parker, CO
Originally Posted by firemediceric
Stupid question, but how would I know that the EBPV is not opening?
Knock on wood, but I can't even remember the last time a code reader was even hooked up to the truck. I hope it continues to stay trouble free.
Any links to clear pics of the EBPV components that get cleaned?
Knock on wood, but I can't even remember the last time a code reader was even hooked up to the truck. I hope it continues to stay trouble free.
Any links to clear pics of the EBPV components that get cleaned?
, you'll have to rely on your gauges to tell you if it's staying closed, or just "feel" by the seat of your pants. If the EBPV is staying closed while accelerating, you'll have skyrocketing EGT's, low or no boost, and the truck just won't get out of it's own way.The last time mine decided not to open up, I hit 1200 degrees on the pyro, and I was only doing 25 mph. That's when I ordered a non-ebpv plate and pedistal. So those no longer exist on my truck anymore
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Thanks Pocket.
I have never driven another 7.3 so I guess I am comparing apples to oranges. I was just pulling a 16ft car hauler loaded with 3 4-wheelers this past weekend and at one point had a pretty good head wind and was having trouble maintaining 70mph up hill with the pedal on the floor. With not being very familiar with diesels I am wondering if this typical performance with this type of load.
I have never driven another 7.3 so I guess I am comparing apples to oranges. I was just pulling a 16ft car hauler loaded with 3 4-wheelers this past weekend and at one point had a pretty good head wind and was having trouble maintaining 70mph up hill with the pedal on the floor. With not being very familiar with diesels I am wondering if this typical performance with this type of load.
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