EBP Cycling

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Dec 8, 2011 | 05:45 PM

Poolguy601

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From: Delaware

EBP Cycling

Is it normal for the valve to cycle open and closed while driving when cold?
It will also cycle in neutral when reved up to around 1200 RPM's. I checked the tube and sensor for being clogged. Both are open.

Dec 8, 2011 | 05:52 PM

snakedoc

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From: AL, Reform

yes it will open and close as you are driving.

Dec 8, 2011 | 07:14 PM

Riffraff Diesel

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Last thing you might do is make sure the sensor is reading correctly.

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Dec 8, 2011 | 07:35 PM

Poolguy601

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From: Delaware

Is there a spec of pressure vs. voltage plus pin position of the sensor

Dec 8, 2011 | 07:46 PM

Milwaukee1979F150

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From: Trenton, MI

How you know if it does?

Noise like airplane jet? I just notice mine did that today after fix turbo leak. It does that when you stop and cruise around 35 mph then it kick bam you had more power but louder. I should had watch boost gauge but 35 mph it was hoover 1-3 psi.

Dec 8, 2011 | 10:46 PM

A/Ox4

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From: Missouri

Quote:

Originally Posted by Poolguy601

Is there a spec of pressure vs. voltage plus pin position of the sensor

Yes. This is from the Ford workshop manual.

Dec 9, 2011 | 12:24 AM

Bonanza35

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From: Norco,CA

Sounds like its working right. When you had the turbo out, you could of taken the pedestal out and set the rod at 10 pounds pressure so you know the ebpv is set right.

Chet

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Dec 9, 2011 | 12:27 AM

A/Ox4

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From: Missouri

You can test the sensor with an AE or a SnapOn scanner. Or if you dont have one you can do it manually. The sensor sends out up to 5V depending on how much EBP it is seeing. If you test what voltage it is sending, you will know what its seeing as far as EBP.

P0470 = EBP sensor circuit malfunction
P0471 = EBP sensor circuit performance
P0472 = EBP sensor circuit low input
P0473 = EBP sensor circuit high input
P0478 = EBP excessive during normal driving

Sensor Wiring Diagram

Voltage vs Pressure Graph

According to the Ford manuals, A appears to be ground. C (Test Pin 30) appears to be the signal wire you need. Wire B is a 5V reference signal that the sensor uses to compare its EBP reading against a true 5V signal. The difference is the EBP. At least thats how I understand it. Here is the wording from the manuals.

Quote:

The exhaust back pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the powertrain control module (PCM), produces a linear analog voltage signal that indicates pressure.

Quote:

DE12 VREF CIRCUIT CHECK
 Measure resistance between PCM Test Pin 90 and Pin B Circuit 351 (BR/W) at EBP sensor
harness connector.

That sounds like "VREF" probably "voltage reference" which would make that the C wire.

Quote:

DE2 SIGNAL GROUND CIRCUIT CHECK
 Disconnect EBP sensor harness connector.
 Measure resistance from Pin A Circuit 359 (GY/R) to chassis ground.

That sounds like wire A is the ground wire.

That leaves C as the EBP reading wire.

Quote:

DE11 EBP SIGNAL CIRCUIT CHECK
 Install breakout box; leave PCM disconnected.
 Measure resistance between PCM Test Pin 30 and Pin C Circuit 553 (P/LB) at EBP sensor
harness connector.