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Author Topic: Ford 6.7 Diesel PIDs
MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: December 29, 2013 (GMT)

FYI:
I’ve been getting 7400 numbers on my Transmission Fluid Temperature gauge when reading below 32 degrees F.
Although I believe that this is caused by negative numbers in Celsius degrees, I’ll have to look into this to display negative numbers. The Coolant and Oil temperature gauges show negative numbers.

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: December 30, 2013 (GMT)

For your readings to be 7400 the raw
hex values are decreasing below zero.

SIGNED(((A*256)+B))*(9/80)+32

Does this work?

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 2, 2014 (GMT)

Quote from Capp777 on December 30, 2013
For your readings to be 7400 the raw
hex values are decreasing below zero.

SIGNED(((A*256)+B))*(9/80)+32

Does this work?

MPD56

Doesn’t seem to work with the double “)” after the B.

SIGNED(((A*256)+B))*(9/80)+32

The formula below with a space between “SIGNED and (” just displays 0.0
SIGNED (((A*256)+B)*(9/80)+32

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 2, 2014 (GMT)

Quote from MPD56 on January 2, 2014
Quote from Capp777 on December 30, 2013
For your readings to be 7400 the raw
hex values are decreasing below zero.

SIGNED(((A*256)+B))*(9/80)+32

Does this work?

MPD56

Doesn’t seem to work with the double “)” after the B.

SIGNED(((A*256)+B))*(9/80)+32

The formula below with a space between “SIGNED and (” just displays 0.0
SIGNED (((A*256)+B)*(9/80)+32

End Quote

Dont know if SIGNED( ) function can handle an equation as
a parameter. Does this work…

SIGNED((A*256)+B)*(9/80)+32
or
((SIGNED(A)*256)+B)*(9/80)+32

Sorry for not being able to test this on my
obdi jeep.

bridge
Member
Posts: 7
 Re: Ford 6.7 Diesel PIDson: January 2, 2014 (GMT)

Quote from MPD56 on December 29, 2013
Quote from bridge on December 23, 2013
Your original Boost equation was off by a factor of 10. So I changed the equation. It now replicates what my dash gauge shows.

((((B*256)+C)*0.03625)-[33])*.1

MPD56
Not sure what your using for a custom PID for boost but I’m not getting anything close to what my dash gauge replicates.

Here’s what I’m using:
PID – 0187
Min – 0
Max – 100000
Header – 7E0

Took a long trip hauling a 40ft RV over the holidays and it was spot on.

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 2, 2014 (GMT)

Bridge
I too am curious about the math. Will you post
the value of [33] and the raw test response of
0187 at KOEO?

What units are you using that require such a high
max value?

Happy New Year!

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 3, 2014 (GMT)

bridge:
I found that I made a typo error in your equation.
((((B*256)+C)*0.03625)-[33])*.1
It now closely replicates my dash gauge also; it is nice to see a gauge with numbers, thank you.

PID 0187 (bridge Equation)
KOEO = 1.4
Coolant Temperature = 145.4
Engine at RPM 680 (Idle) = 1.9
Trip Highest Value = 18.1
Trip Lowest Value = 1.5

PID 0187 (cap777 Equation)
KOEO = 0.9
Coolant Temperature = 145.4
Engine at RPM 680 (Idle) = 1.5
Trip Highest Value = 23.0
Trip Lowest Value = 1.0

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 3, 2014 (GMT)

Capp777: Thanks
I decided to try your equation (below) for the TFT. The highest air temperature here is -25F and I’m using the block heater before starting my truck with the remote. The truck’s TFT is over 32F by the time I get in my truck. I will have to wait to it gets warmer to try and see if it works out, maybe around -10F (LOL).

((SIGNED(A)*256)+B)*(9/80)+32

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 7, 2014 (GMT)

Quote from MPD56 on January 3, 2014
bridge:
I found that I made a typo error in your equation.
((((B*256)+C)*0.03625)-[33])*.1
It now closely replicates my dash gauge also; it is nice to see a gauge with numbers, thank you.

PID 0187 (bridge Equation)
KOEO = 1.4
Coolant Temperature = 145.4
Engine at RPM 680 (Idle) = 1.9
Trip Highest Value = 18.1
Trip Lowest Value = 1.5

PID 0187 (cap777 Equation)
KOEO = 0.9
Coolant Temperature = 145.4
Engine at RPM 680 (Idle) = 1.5
Trip Highest Value = 23.0
Trip Lowest Value = 1.0

End Quote

MPD56

Still trying to work boost backwards for MAP psia – Baro()
using your bridge data.

((((B*256)+C)*0.00393)+2.25)-Baro()

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 7, 2014 (GMT)

Capp777:
Bridge’s equation seems to match the truck’s gauge. Can the KOEO reading of 1.4 psi be adjusted in the profile to read zero?
I’ll also test your equation. Since the Ho Ho season is behind us, I should have more time.

FYI
My 6.4 and 6.7 produce boost when revving the engine in park, the boost reading drops off quicker on the 6.7 when a let off on the throttle because it has a waste gate. The boost also drops off because less throttle produces less exhaust to turn the turbo. The 6.7L exhaust outlets (ports) are located on the in-board side of the cylinder heads.

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 7, 2014 (GMT)

I would think subtracting 1.4 in the profile
would also change your high end values.

If I did the math right the new span should
address that issue. Since you said bridge’s
*.1 fix to the original equation matched your
vehicle’s display, I used the data to back
calculate the correct span.

I know the boost equation was solved to your satisfaction
with bridge’s equation but it doesnt lend itself to working
back to a known MAP psia. Odd’s are that the MAP span
needs to be corrected as well. Plus as you mentioned the
span was off at the low end for boost which suggests that
it could be off at some point in the high end readings.

Thank you for the info on boost on throttle. I was getting
confused on that fact for turbos. Are the boost readings
at throttle increase repeating at a given rpm?

I was hoping the Bernoulli principle was still working
for throttles 😉

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 8, 2014 (GMT)

The boost readings don’t repeat at a given RPM, I didn’t expect them too? My PCM changes the speed of the turbo and variable vanes that affect boost among other things. When parked I can bring the engine up to a RPM, the boost will go up and then it will drop because the load will drop. If I tow my trailer up a hill with the cruise control on, the boost will stay the same because I’m assuming the load hasn’t changed. At first (starting at the bottom of the hill) of course the PCM will make adjustments (Tunes) the engine, If I watch the boost on a graph display, it is prominent.
Bridge’s equation gets me in the ball park, although I normally watch boost for fuel economy and piece of mind, my addiction to “Have to know” will keep me tweaking all the PIDs (Mind Candy). My truck is new and still under warranty, I thought I’d learn how Torque Pro works on it first so I could use it on my other toys I tinker with. My wife told our kids that I was reading my old text book on Fluid Dynamics and they’re glad I’m not seating in my truck watching the Torque screen LOL.
I don’t know if the Bernoulli principle will help with boost (gas) on a turbo charged engine, but a little light reading can’t hurt?

Capp777: Thanks again for the help, I really thought I’d have all the equations behind me by now and play with the other features of Torque; it has showed me how much I forgot or have to learn.

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 8, 2014 (GMT)

I suspect your variable vanes are affecting the boost
much like a throttle plate in a gasser carburator.

Thank you, MJ, Bronco and Bridge for bearing with
and educating a “gasser” on the fine points of operating
a Diesel. Your patience has been most appreciated.

At -25 temps I hope you are not spending too much time
in the truck. Your family will have to pry you out

Again, thanks for the education.

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 9, 2014 (GMT)

Capp777:
I want to thank you and the others for your time and knowledge. You help me solve 16 out of my list of 39 PIDs, Programming Operator’s (UNSIGNED…etc) and more.

You stuck by me through most the hard ones and I’m going to concentrate on what I thought would be the easy ones for awhile LOL. And also the Torque Pro program customizing features like the themes and logging.

My short wish list.
I can’t complete a full scan without error.
How to edit a non extended PIDs (know the information to make a custom PID).
The Speed PID
The Fuel PIDs (E.g. MPG, GPH…etc)
The Gear PIDs
The DPF PIDs (soot mass, when in Regen..etc)

For a start.

Today was a balmy 10 degrees and I was thinking of putting on sun screen and go out.

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 10, 2014 (GMT)

The mode 1 pids are documented
in Wiki… some with equations.

There is a gps speed pid if you can’t
find Ford’s and 010d is not reporting.

The pids for MPG etc. are calculated
internally by Torque using different
equations based upon fuel type and
sensor combinations (MAP/MAF) based
on my searches to date.

If you decide to test the last boost
equation I gave you and it works…
drop the “-Baro()” for your MAP psia
pid.

Hope the signed tft equation works for
you.

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 10, 2014 (GMT)

Capp777:
I did just test your boost equation and it seems to follow my dash gauge a little better at the low end. Because of the dash gauge being analog with a needle it is hard to tell at the high end.

PID 0187 (bridge Equation)
KOEO = 1.4 psi
Coolant Temperature = 176.0
Engine at RPM 600 (Idle) = 1.9
Trip Highest Value = 19.4 psi
Trip Lowest Value = 1.5 psi
PID 0187 (capp777 last Equation)
KOEO = 0.1 psi
Coolant Temperature = 176.0
Engine at RPM 600 (Idle) = 1.5
Trip Highest Value = 19.6 psi
Trip Lowest Value = 0.3 psi
I think the SIGNED TFT equation although the outside temperature only has got done to 1 degree F and I haven’t confirmed if it will show a negative number
Thanks
On to my wish list.

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 10, 2014 (GMT)

If your tft temps below 32 seem reasonable
then the negative values should work too.

Thanks for the update.

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 18, 2014 (GMT)

MPD56:
Since my Jeep is OBDI and I cant test things
without family here… can you tell me if log()
function and 10^-3 work in the equation parser.
I am working on an altitude equation based
on the vehicle baro that require them to work.
If you are unable to test thats okay too.

Capp777:
I’d love to try and help you out. I tried them in an equation and the log() seem to work. Can you let me know in detail an equation to try it in. You know I was smart to I met you (LOL).

Capp777
Member
Posts: 2994
 Re: Ford 6.7 Diesel PIDson: January 18, 2014 (GMT)

MPD56:

Thanks for confirming these functions
work in the parser. I found some information
on a hot air balloon site for altitude calculations
that I wanted to try out… but without these
functions it would not work.

I dont remember log() being mentioned as an available
function in the math summary thread.

My latest posting on the 7.3 trans temp, iat and map
thread has a polynomial equation for TFT F that uses the
exponential operator (^) which I was hoping would work.

MPD56
Member
Posts: 276
 Re: Ford 6.7 Diesel PIDson: January 20, 2014 (GMT)

Just bumping it up.
Also just want capp777 and MJ to know how great to see the progress on the 7.3. I guess I’m going to have to wait till they get a 6.7 or step my game up a bit (LOL).

Capp777:
Your TFT equation is the same as my dash readout. It was -10 F this morning and for some reason the dash and Torque TFT both read 4 F, I was hoping to see my first negative temperatures. Tomorrow morning it is going to be colder. Wife still doesn’t understand, but as long as I take her dog out for the morning business, she lets me have my Torque fix.

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