DPFE Help Please
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New User
Joined: Nov 2010
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From: Athens, GA
DPFE Help Please
I have a 1993 F-150 302 (5 l 4x4 and can't find the DPFE. Three Autozone guys could not find it. I give up. Do you know where it is, or who I should ask?
Thanks for your help.
Robert
Thanks for your help.
Robert
Senior User
Joined: Oct 2010
Posts: 333
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From: Lawton, OK
Dano's right. You don't have one. You have an EGR valve position sensor. And three Autozone employees who need to be replaced.
DPFE means "Delta Pressure Feedback" and uses exhaust pressure through a silicone hose and other stuff I can't remember. 3.0L Rangers have them, but not the big trucks. Different part than an EVP, but more or less has the same purpose.
DPFE means "Delta Pressure Feedback" and uses exhaust pressure through a silicone hose and other stuff I can't remember. 3.0L Rangers have them, but not the big trucks. Different part than an EVP, but more or less has the same purpose.
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
I thought those two terms (DPFE and EGR Valve Position Sensor) were pretty much synonymous.
While they are they are not, they both monitor egr function just do so different ways.
EVP just monitors the valve position, if it opened or not. Easy to disable, just block the tube, if otherwise left intact it'd still pass emissions testing.
DPFE actually monitors the egr flow, it monitors the pressure in the tube on both sides of a small orifice, its hard to fool, can't eliminate it by simply blocking it off. The computer would know and throw a code, fail emissions testing.
Newer models use the DPFE sensors. Expy Explorer I take it? yea they have em, had to replace it on one we had to. That and the egr tube, little more then 17 bucks for it though!
While they are they are not, they both monitor egr function just do so different ways.
EVP just monitors the valve position, if it opened or not. Easy to disable, just block the tube, if otherwise left intact it'd still pass emissions testing.
DPFE actually monitors the egr flow, it monitors the pressure in the tube on both sides of a small orifice, its hard to fool, can't eliminate it by simply blocking it off. The computer would know and throw a code, fail emissions testing.
Newer models use the DPFE sensors. Expy Explorer I take it? yea they have em, had to replace it on one we had to. That and the egr tube, little more then 17 bucks for it though!
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Joined: Mar 2005
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Expy = Expedition
Mine is a '99 with the 5.4L.
This is what I had to swap: Master Pro Ignition 2EPS4 - EGR Pressure Feedback Sensor 1999 Ford Expedition | O'Reilly Auto Parts
It seems to monitor the fore and aft pressures and report to the ECM what the state of the EGR valve is.
My bad....they seem to run between $50 and $60.
Mine is a '99 with the 5.4L.
This is what I had to swap: Master Pro Ignition 2EPS4 - EGR Pressure Feedback Sensor 1999 Ford Expedition | O'Reilly Auto Parts
It seems to monitor the fore and aft pressures and report to the ECM what the state of the EGR valve is.
My bad....they seem to run between $50 and $60.
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Senior User
Joined: Jul 2009
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From: North Platte NE
I've seen a few 96 trucks with mass air have them but a sd truck like all the rest of ours don't have a dpfe.
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New User
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From: Athens, GA
Are EGR Position Sensor and EGR Pressure Feedback Sensor Mutually exclusive?
I can find the EGR Position Sensor on top of the EGR valve. However, Autozone's computers (and web site) list an EGR Pressure Feedback Sensor (DPFE). O'Reilly's web site does not list a EGR Pressure Feedback Sensor.
Can you have both or are they mutually exclusive?
You guys are great. Thanks.
Can you have both or are they mutually exclusive?
You guys are great. Thanks.
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New User
Joined: Nov 2010
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From: Athens, GA
Follow up question
I can find the EGR Position Sensor on top of the EGR valve. However, Autozone's computers (and web site) list an EGR Pressure Feedback Sensor (DPFE). O'Reilly's web site does not list a EGR Pressure Feedback Sensor.
Can you have both or are they mutually exclusive?
You guys are great. Thanks.
Can you have both or are they mutually exclusive?
You guys are great. Thanks.
Fleet Owner
Joined: Oct 2005
Posts: 20,783
Likes: 1,749
From: Kentucky
I can find the EGR Position Sensor on top of the EGR valve. However, Autozone's computers (and web site) list an EGR Pressure Feedback Sensor (DPFE). O'Reilly's web site does not list a EGR Pressure Feedback Sensor.
Can you have both or are they mutually exclusive?
You guys are great. Thanks.
Can you have both or are they mutually exclusive?
You guys are great. Thanks.
In your case, you have an EVP sensor.
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