Your confusing me!! Which way is it!

I don't believe that EPS affects fueling at all on the 7.3. 6.0 with VGT turbo is a whole nother story

 

I'm talking a bout the EBPV in the first quote. In the second quote, the Exhaust presure sensor, which is up by the Hpop...
What is to be confused about?

I'm not sure the correct term for the sensor. Glenn understood what I was talking about..
Though, I'm not sure why the other poster brought up programing and EBPV stuff.

 

Gotcha. I thought you were talking about the sensor in both posts.

 

Yeah, the exhaust sensor that has the tube off the header can cause de-fueling when your going for big numbers.

 

Who says??

 

This is what the book says anyhow. As I see it is supposed to send input to the PCM for EBPV control.


EXHAUST BACK-PRESSURE SENSOR
The exhaust back-pressure is controlled by the PCM to provide more heat to the coolant for cab heating when ambient air temperature is below 7°C (45°F) and engine oil temperature is below 75°C (167°F) during low load, low speed operating conditions.

 

Air filter is brand new, i figured i would need a hpop eventually but i thought you got more fuel/smoke with a bigger hpop. i will try the eps tube cleaning, is it pretty straight forward? From what ive seen it looks like tw's tunes smoke more, and im not willing to send in for a reburn without talking to him first even though i know people just do it

 

Tis what I've heard.

They also say the map sensor can, and some say it wont.

But whatever.

 

I was told the sensor can just be unplugged and the tube removed, with a plug installed in the manifold, if the ebpv is deleted.. IIRC it was Jim who said this. Said it has no effect on our trucks.

 

MAP can "defuel" but its cause it gets confused when it sees high boost. Some do, some don't. Mine does that is why I have a mini regulator in the MAP line so the MAP only sees 25 psi or so.


To the OP, a HPOP may help with smoke. If the HPOP can't keep pressures up the fuel doesn't atomize as well as it should and if it isn't atomized it won't burn as complete. So higher pressures, atomize the fuel better and will create a more complete burn which means less smoke.

Some data logging will be needed to know whether your HPOP is not able to keep up.

 

I'm not sure how EBPV came up talking about exhaust back pressure sensor, which isn't really involved much in EBPV strategy.
Mostly because it involves fuel strategy, not the EBPV.
Though, I'm sure that it could somehow.

If the tube is cracked or clogged, the truck wont fuel right.

If you unplug the sensor, the truck wont run right.
So you let it run atmo and just plug the tube.

Works under the same concept that tim is talking about with the Map sensor. Though, I've heard people say that OBS trucks dont have to worry about that and its a SD thing.

so, there is lots of.... iffy info out there.

 

Borrowed from Big K on another forum.


SIGNAL FUNCTIONS
The EBP (Exhaust Back Pressure) sensor is a variable capacitance sensor that when supplied with a 5 volt reference signal from the PCM produces a linear analog voltage signal that indicates exhaust back pressure.

The EBP sensor's primary function is to measure exhaust back pressure so that the PCM can control the exhaust back pressure regulator when needed.

FAULT DETECTION MANAGEMENT
An EBP signal that is detected out of range high or low by the PCM will cause the engine to ignore the EBP signal and disable exhaust back pressure operation.

The NGS tool will display a fixed PID value of 43.5 PSI (300 kPa) for EBP when exhaust back pressure is in default.

 

i found out my EBP sensor tube was plugged SOLID, it was nasty. guessing it was from the bad injector orings and the extended idol time in the winter but anywho. i cleaned it and noticed zero difference

 

I appreicate the answers. Mine is so rusty, if I attempted to clean it, well, you know.

 

Interesting.

You guys know that when the EBPV is activated, it changes the fuel maping right?

Just a thought there.
The PCM doesn't know if its closed or not, just if its needing to be closed.

I get more fuel delivery now I cleaned mine. Went from clean to smoke out every intersection.