Exhaust Back Pressure readings? - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 08-01-2011, 12:29 PM   #1 (permalink)
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Exhaust Back Pressure readings?

What is 'normal' readings for EBP? Just curious. I have the ability to read them but don't have a clue what is normal.

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Old 08-01-2011, 03:43 PM   #2 (permalink)
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IIRC, EBP ranges from 0-34 psi normally. The 34 psi would be what the EBP system maintains for engine warm-up

I can't confirm that however, because my service CD doesn't run correctly in Win7
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Old 08-01-2011, 03:59 PM   #3 (permalink)
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Originally Posted by klhansen View Post
IIRC, EBP ranges from 0-34 psi normally. The 34 psi would be what the EBP system maintains for engine warm-up

I can't confirm that however, because my service CD doesn't run correctly in Win7
At idle it is reading 14-15 psi.

Thanks,

Griz
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Old 08-01-2011, 06:08 PM   #4 (permalink)
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Key on engine off should read 14 psi (ambient) Should read 14-18 psi at idle warm, 28 psi max at 3000 rpm warm.
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Old 08-01-2011, 08:34 PM   #5 (permalink)
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Originally Posted by Evel486 View Post
Key on engine off should read 14 psi (ambient) Should read 14-18 psi at idle warm, 28 psi max at 3000 rpm warm.
Okay...Thanks

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Old 09-01-2011, 11:45 PM   #6 (permalink)
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I had a bad ICP Sensor. While installing the new ICP Sensor, I decided to also install a new EBP Sensor even though I was not throwing a code. Changing the EBP Sensor, I noted the tube was showing fatigue and decided to replace it as well. After installing the new EBP Sensor and tube, I now have a P0470 code (Exhaust Back Pressure Circuit Failure). I was very careful with the plug and it looks great. My engine monitor shows a constant 43 psi of Back Pressure never fluctuating. Does anyone know if the PCM will reflect a 43 psi reading as a default if I indeed have a bad circuit? Thank you, Bob
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Old 09-02-2011, 01:09 AM   #7 (permalink)
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So with a normal load in the truck or van and running around 1700 rpms the back pressure should be around 18-20?
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