Hi Capp777 – I tried your new equation which does move the gauge. With yours at or just above idle it was showing 15.7 psi where as the MPD56 equation was showing between 391.5 and 425.9 psi at the same idle.

Quote from Capp777 on November 15, 2014
Did you ever figure out 0173?

((B*256)+C)*(1.45038*(10^-3)) ? PsiA

((B*256)+C)*(1.45038*(10^-3))-Baro() ? PsiG

Edited.

End Quote.

I would be curious about
your KOEO readings… do they
match atmospheric pressure?

Do your readings seem reasonable (change
up/down as expected with boost) ?

The 7.3L EBP ran about 1.5 PsiG EBP
above boost at idle. (when corrected
to match atmospheric pressure at KOEO).

On the 7.3L, as boost/rpm increased the
EBP increased as well.

Based upon your KOEO info the EBP makes
sense… your idle data seemed to be in the
ball park of 1.5 PsiG EBP above boost… I
am guessing your boost was around 1 or less at
idle based upon previous data in this thread.

Now the only question remaining is the high
end EBP. Does your truck send a constant
value when it detects a faulty sensor like
the 7.3L’s? (300 kPaA = 43.51 PsiA = 28.81 PsiG?)
or maybe something like below…

From the 7.3L thread…

Quote from Capp777 on January 6, 2014
I would think its used by the pcm along
with other sensors to calculate accurate air
flow, air density and fuel delivery.

Edit:

It looks like your EBP value is off by 6.3.

Not sure but I think it should be equal
to MAP psia and Baro psia at KOEO., ~19
at 1700 rpm and ~28 at 3000 rpm based
upon what I’ve read so far.

Did you pressurize the EBP to get 21 psia
at KOEO? It was reading 7 at idle in previous
screenshots.

P0470 Exhaust Back Pressure Sensor Malfunction
according to my manuals.

End Quote.

Superdog404:

Thanks for the update… are your EBP units
still in PsiA (or PsiG) ?

Side Note:

If you remove the “-Baro()” term from the
Boost equation… what’s left equals MAP PsiA.
(MAP pid in list is likely not accurate as it is
based upon older Fords and inH2O). Your
Boost equation is correct as is for Boost.

Edit:

17.5 PsiA = 3.0 PsiG EBP ?

Boost units are in PsiG. (20.2 PsiG).

Someone posted on another forum that EBP for a 6.7L

The EBP sensor input units is volts and range is 0V to 5V
The ECM EBP output is 0kpa to 551.0kpa

I’m waiting for a PM from him for more information but it looks like the output is in KpaA?

Hope this makes sense. I’m going to try and check this out later. I’m assuming with KOEO it should show Baro?

I don’t know of the PID for the EGT in volts. I have monitored the EGT voltage with the dealer’s scanner but it only shows EGRT11_V and not the number?

Sorry, I’m not sure what you’re trying to do? How did you install the Ford Specific PIDs for the 6.7? The EGT PID here should read well over the range of the exhaust temperatures, it is unlikely that EGT11 would be over 1000 degrees.

You might want to check if there is a “SET Maximum Value” set for that display?

FYI: Check page 109 on the link below.

https://www.motorcraftservice.com/vdirs/diagnostics/pdf/DOBDSM1101.pdf

Also for light reading.

http://www.ford-trucks.com/forums/1322804-torque-pro-ford-6-7l-extended-pids.html

Is your sensor linear to temperature changes
or is it a polynomial response? (Since you are
looking on the input side).

Can you post a sample of your
pid’s raw hex response…

For the 7.3L we used

((A*256)+B)/13168 for TFT Volts

Im guessing you may need

((B*256)+C)*(1/13168) for Volts?

Not sure… according to your table
0.802V sensor would be below freezing.

032f 815/1016=0.802 ?

((A*256)+B)*(1/1016) ?

Sorry the hex response from Torque
pid editor since Im guessing at the
variables.

Edited.

Less than symbols mess with your post apparently. as I was saying..

The variables are A, B. Another interesting thing is that the ohms are 220 @.80V not less than 202ohms as indicated by the table. I’m really not trusting that table right now.