Exhaust back pressure sensor - Diesel Bombers



 
 
 
 
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  #1  
Old 11-02-2008, 07:49 PM
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Default Exhaust back pressure sensor

What is a ebp sensor and where can i find it on my 03 7.3? Thanks.

Dale
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  #2  
Old 11-02-2008, 08:02 PM
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gimme a sec i got something for you.....
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Old 11-02-2008, 08:09 PM
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Exhaust Back Pressure (EBP) Sensor
Courtesy of: Ford Motor Company Publication FCS-12178-97



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.



After removing connector always check for damaged pins, corrosion, loose terminals, etc.

Connector Checks to Ground (B-)
(Check with Sensor Connector Disconnected and Ignition key off, all accessories off)
Test Points Spec. Comments
A to Grd. < 5 ohms Resistance to chassis grd. check w/key off, if > than 5 ohms harness is open -Signal Grd.
B to Grd. > 1000 ohms Resistance less than 1000 ohms indicates a short to ground. - VRef
C to Grd. > 1000 ohms Resistance less than 1000 ohms indicates a short to ground. - EBP signal

Connector Voltage Checks
(Check with sensor Connector Disconnected and Ignition Key On)
Test Points Spec. Comments
A to Grd. 0 - .25 volts If greater than .25 v signal ground is open or shorted to VRef or battery.
B to Grd. 5 .5 volts VRef check with key "ON," if voltage not in spec., see VRef circuit
C to Grd. 0 - .25 volts If greater than 0.25 volts, signal wire is shorted to VRef or battery.

Harness Resistance Checks
(Check with breakout box installed on engine harness only)
Test Points Spec. Comments
#91 to A < 5 ohms Resistance from sensor connector to 104 pin connector - Signal ground
#90 to B < 5 ohms Resistance from sensor connector to 104 pin connector - VRef
#30 to C < 5 ohms Resistance from sensor connector to 104 pin connector - EBP signal

Test Points Operational Voltage Checks
(+) #30 to (-) #91 (Check with breakout box installed in line with the PCM)
Voltage PSI KPAG Comments
.8-1.0 v 0 o Signal with key "ON" and engine OFF (Value dependent upon atmospheric pressure and altitude.)
.8-1.0 v 0 0 Normal warm idle signal.
1.19 v 14.8 10.0 Minimum signal expected at 2300 RPM with warm engine. (See EPR diagnostics)

Circuit Faults: Diagnostic Trouble Code Description
0472 = Signal voltage was less than .039 volts for more than 0.2 seconds.
0473 = Signal voltage was greater than 4.90 volts for more than 0.2 seconds.


Copied From ECSD - Exhaust Back Pressure (EBP) Sensor - 1994-1997 Power Stroke FAQ
  #4  
Old 11-02-2008, 08:20 PM
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Wow Benjamin, I have owned trucks with diesel's for years now but I always trade them in for new ones when they get a couple years old so I have never worked on them. Trying to take all that in made my brain start to smoke. Reading a thread on another site I saw that the ebp sensor could affeect fuel economy if it is plugged that is why I was asking where it was located.

Dale
  #5  
Old 11-02-2008, 08:26 PM
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i c. what is your current mileage?
  #6  
Old 11-02-2008, 08:28 PM
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101k.
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Old 11-02-2008, 09:24 PM
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no i meant MPG....
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Old 11-03-2008, 05:50 AM
Diesel Fan
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I am getting 16 mpg.
 
 
 

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