EBP Sensor & Tube - Diesel Forum

thicks3 · 09-06-2005, 11:41 AM

Decided to clean my EBP tube this weekend since I had never done it. Yes, it was clogged. Used brake cleaner, air pressure, small screwdriver, grease gun, and wire but was not getting the "free flow" results. Finally crawled underneath and disconnected the line and had the wife shoot air down the tube. The result, lots of air flowing but none out the end. Seems I have a hole in the tube about 3/4 the way down. Does this need to be replaced or should I just get the code eliminator? I would imagine the cost of the tube would probably be more than the eliminator.

Also, What the heck does the EBP Sensor do and why does it do it?

Thanks

Derag2 · 09-06-2005, 01:00 PM

Tube cost me 20 bucks........... The sensor senses the exhaust back pressure, so it say the EBPV gets stuck shut and you try giving her hell the senor will see that the the pressure is too high and then will defuel the engine....... I personally don't beleive in the eliminator, some guys on here say to do it i chose to buy a new sensor and tube.

thicks3 · 09-06-2005, 02:29 PM

Thanks Derag2. Both the dealer and Powerstrokeshop.com want $51.23 (part #1C3Z9D477AA). Do you have different source for this part?

Thanks again.

hamboners · 09-06-2005, 02:31 PM

just replaced mine FORD house was $40 local salvage $20 plus I got the sensor and cps thrown in for $10 more.

SuperCrutyPS · 09-06-2005, 02:38 PM

Okay - I'm a newbie when it comes to PSD. Just bought my first one a week ago.
This weekend we took the truck to Bend, OR to visit our kids/Grandkids. While on the way, I threw a code. Once in Bend, I had it read at the local Schucks. He didn't tell me the code number, but he did say it was Exhaust Pressure Sensor.

I am mechanically inclined, but being a newbie, I don't have any idea where to look for the sensor or a clogged tube. I haven't yet bought a manual (Plan on it tonight after work).

Can someone point me in the right direction? How often does this tube clog?

Wide open for advice from the veterans....

SuperCrutyPS · 09-06-2005, 02:44 PM

Thanks - I found what I was looking for - I guess I should have poked around on here a little more - I'm a newbie here too.

thicks3 · 09-06-2005, 03:51 PM

Does anyone know if the 6.0 tube will fit the 7.3? They both share the same sensor but what about the tube??? It's half the price of the 7.3 but looks exactly the same.

Thanks

fordmastertech · 09-06-2005, 04:13 PM

[ QUOTE ]
Does anyone know if the 6.0 tube will fit the 7.3? They both share the same sensor but what about the tube??? It's half the price of the 7.3 but looks exactly the same.

[/ QUOTE ] The 6.0L EBP tube is a totally different tube and will not line up correctly on a 7.3L.
FMT

wildbill1963 · 09-06-2005, 04:23 PM

Put in an elimnator and forget about it. Stop wasting money for anew one, as it will continue to happen.

thicks3 · 09-06-2005, 06:37 PM

Still don't understand what the whole Exhaust Back Pressure system is for. Why is it there? Is it strictly emissions related?

Derag2 · 09-06-2005, 06:51 PM

sorry......... it was 51.23 i was thinking of my rear speed sensor was 20 somthing......... The sensor defuels the engine when theres too much back pressure on the exhaust, its help protect the engine if somthing happens............ I'd go to the junk yard and see if theres one that aint clogged, or you can put the eliminator on it, but i don't think its the right answer just the cheap way out ( my opinion only)

**klhansen** · 09-06-2005, 09:46 PM

[ QUOTE ]
Still don't understand what the whole Exhaust Back Pressure system is for. Why is it there? Is it strictly emissions related?

[/ QUOTE ]

It's there to get the cabin warm quicker. Nothing else.

BTW it doesn't defuel the engine. It just delays the application of power a bit. If you hammer it when the EBP valve is closed (when it's working correctly), the PCM senses the call for fuel and opens the valve. This can get exciting when you need to get out of the way before it's fully warmed up and the EBP system is disengaged by the Engine temp sensor.

thicks3 · 09-07-2005, 11:37 AM

So if I have a hole in my tube, the sensor will never sense any back pressure. Is that good or not so good? In other words, if I leave it alone will the valve operate correctly?

Thanks

**klhansen** · 09-07-2005, 11:42 AM

[ QUOTE ]
So if I have a hole in my tube, the sensor will never sense any back pressure. Is that good or not so good? In other words, if I leave it alone will the valve operate correctly?

Thanks

[/ QUOTE ]

No, it won't work worth a darn if you put it back with the hole in the tube. The way the EBP system works is it closes the valve until it senses and builds up the programmed backpressure. If there's a hole in the tube, the sensor will be seeing atmospheric pressure all the time, and the valve will just keep on closing, not modulating to the correct pressure for warm-up. In other words, the sensor won't be able to tell the PCM to open the valve back up when the pressure builds, because it won't be able to see that pressure.

thicks3 · 09-07-2005, 12:10 PM

Got it, I think. So the sensor tells the PCM what the pressure is, and when it reaches a certain level, the valve opens (I guess the backpressure is there to help warm the engine). With the Eliminator, the sensor shows the PCM a predetermined static pressure level at all times. If this is the case, does the engine warm slower?

Bear with me, I'm trying to grasp this!