MAP and EBP Torque reading
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Ford specific Boost can be compared with my stuff... but I think they are the same. Use "Torque Scan" on the main screen while connected to the truck in KOEO... see if BARO pops up with a value. It takes time to get all those values, so be patient and keep scrolling back and forth.
Thread Starter
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Cross-Country
Joined: Jan 2008
Posts: 66
Likes: 1
From: Centennial CO
I was able to swap the MAP and EBP yesterday and here are the findings.
Elevation 6600 ft, Engineering toolbox BARO table shows approx 11.5 is correct.
1st I measured his sensors in his truck.
KOEO
MAP 11.4
EBP 15.3
His are both oem and truck runs like a top.
My sensors my truck.
KOEO
MAP 11.3
EBP 14.7
His sensors my truck.
KOEO
MAP 11.4
EBP 15.0
3 bad sensors?
Torque equation in use for EBP:
((A*256)+B)*0.03625
3 bad sensors?
Thanks,
Wink
Elevation 6600 ft, Engineering toolbox BARO table shows approx 11.5 is correct.
1st I measured his sensors in his truck.
KOEO
MAP 11.4
EBP 15.3
His are both oem and truck runs like a top.
My sensors my truck.
KOEO
MAP 11.3
EBP 14.7
His sensors my truck.
KOEO
MAP 11.4
EBP 15.0
3 bad sensors?
Torque equation in use for EBP:
((A*256)+B)*0.03625
3 bad sensors?
Thanks,
Wink
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Yep, he posted KOEO, MAP within .2 psi of Baro. Waiting to see the numerical values to see if the formula is set right for the EBP.
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
Sidetrack alert....*We* place a lot of faith and value to the info gleaned from AE and now Torque. We know that certain versions of AE can report flawed data.
Don't know where I was going with that other than...verify, verify, verify.
Don't know where I was going with that other than...verify, verify, verify.
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Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
It's a good plan, we've seen a few folks spend money on sensors because of the sensor data......then they come to find out the newer version of some of the software is all jacked up......
Lead Driver
Joined: Jun 2004
Posts: 6,315
Likes: 582
From: Amarillo, TEXAS!
According to what I get from the book, the voltage reading is a linear relationship to pressure and y = 12x. So the absolute pressure should be voltage * 12, and should be fairly close to the MAP reading with KOEO. In other words, your scanner should show about 0.95 volts from the EBP sensor with an 11.4 psi MAP reading. Sensors are rarely dead on, so expect some variance from that number.
If you want to check the pins on the connector, here are the values.
With KOEO,
Pin A, grey/red tracer (signal return) - less than 5 ohms to chassis ground
Pin B, brown/white tracer (VREF) - 5.0v +/- 0.5V
Pin C, pink/light blue tracer (to PCM) - less than 5 ohms to PCM pin 30 (in case you're really feeling ambitious)
If you want to check the pins on the connector, here are the values.
With KOEO,
Pin A, grey/red tracer (signal return) - less than 5 ohms to chassis ground
Pin B, brown/white tracer (VREF) - 5.0v +/- 0.5V
Pin C, pink/light blue tracer (to PCM) - less than 5 ohms to PCM pin 30 (in case you're really feeling ambitious)
Thread Starter
|
Cross-Country
Joined: Jan 2008
Posts: 66
Likes: 1
From: Centennial CO
According to what I get from the book, the voltage reading is a linear relationship to pressure and y = 12x. So the absolute pressure should be voltage * 12, and should be fairly close to the MAP reading with KOEO. In other words, your scanner should show about 0.95 volts from the EBP sensor with an 11.4 psi MAP reading. Sensors are rarely dead on, so expect some variance from that number.
If you want to check the pins on the connector, here are the values.
With KOEO,
Pin A, grey/red tracer (signal return) - less than 5 ohms to chassis ground
Pin B, brown/white tracer (VREF) - 5.0v +/- 0.5V
Pin C, pink/light blue tracer (to PCM) - less than 5 ohms to PCM pin 30 (in case you're really feeling ambitious)
If you want to check the pins on the connector, here are the values.
With KOEO,
Pin A, grey/red tracer (signal return) - less than 5 ohms to chassis ground
Pin B, brown/white tracer (VREF) - 5.0v +/- 0.5V
Pin C, pink/light blue tracer (to PCM) - less than 5 ohms to PCM pin 30 (in case you're really feeling ambitious)
Pin A .03
Pin B 5.07
Pin C .92
If I follow; PIN C .92*12=11.04. Sensor is in tolerance @ +/- .46?
Thanks,
Wink
Lead Driver
Joined: Jun 2004
Posts: 6,315
Likes: 582
From: Amarillo, TEXAS!
Assuming that value is with the harness connected to the sensor, key on engine off, it's very close to where I'd expect to see it. I've tried 2 different EBP sensors on my truck and the both read ~18 psi or so in Torque. When I have time, I'm going to look onto the formula and try to figure out if that's the problem. I'll also see if I can come up with a way to read the voltage in Torque.
Lead Driver
Joined: Jun 2004
Posts: 6,315
Likes: 582
From: Amarillo, TEXAS!
Well, I've looked at the formula and the hex values, and the formula looks right. Why it reads a different value from what it should at a particular voltage is a mystery to me. I'd like to get this sorted out, but probably won't have time to look too deep into it this week. I'm in the middle of remodeling mom's bathroom, and have other things going on as well.
Lead Driver
Joined: Jun 2004
Posts: 6,315
Likes: 582
From: Amarillo, TEXAS!
The formula ((A*256)+B)*((29/80)/10) is what I come up with, and is mathematically the same as the one that comes with the extended PIDs, and the one you posted. It should theoretically work fine. The formula and PID are the same for 6.0 trucks. It would be interesting to know if any 6 liter guys have experienced this.
I should say though, I haven't yet taken the time to check the voltage on the pins at the sensor. Maybe I can do that in the next couple days, and look at the readings in AE as well. I'd like to check it on a WOT run too so I can see if the difference is linear or not. If it is, I might just subtract the difference via the Torque formula and call it a day.
I should say though, I haven't yet taken the time to check the voltage on the pins at the sensor. Maybe I can do that in the next couple days, and look at the readings in AE as well. I'd like to check it on a WOT run too so I can see if the difference is linear or not. If it is, I might just subtract the difference via the Torque formula and call it a day.