Egr question
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Cross-Country
Joined: Nov 2015
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Egr question
90 4.9 300, code koeo 31. I've been messing with the sensor, swapped with another one, checked voltage, etc. What I have figured out is that the voltage is low, about .14 and it should be about .24v with no vaccum and 4v where it should be 5v at full vaccum. Now if I apply a little bit of vaccum to the egr, I can get the voltage in spec and the code will go away which is telling me that the plunger on the sensor isn't touching the egr when it is closed. Both the egr and sensor are new about a year ago from Amazon (I know, they are cheap and usually cause issues). So a few questions, since I ordered from Amazon sometimes they will say that a 5.0 part is the same as a 4.9 part so I'm wondering if maybe my egr valve is ment for a 5.0. Are they interchangeable or are they different? Is the clearance from the sensor different? Same with the egr position sensor, is it interchangeable with the 5.0 to 4.9? Just wondering if I just got wrong or bad parts. Then my follow up question is could I put something on the end of the plunger on the sensor to make it longer to where it would read correctly, you know what I mean? Thanks for insight, I'd rather not throw parts at it until I know what the problem is
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Cross-Country
Joined: Nov 2015
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Likes: 4
I think I figured out my problem. I looked back at the egr I bought on Amazon and there were some reviews saying that the diaphragm is too short to reach the sensor properly. So it is the egr. Now could I shim something up in there to make it work or should I just buy a new one?
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
Most of the time we see aftermarket EVP sensors with the shaft too long to work on factory EGR valves. In those cases you have the option to shorten it. Since yours is too short, I would return it then find a Ford/Motorcraft version or a higher quality aftermarket. I believe the EVP sensor is the same for the 4.9/5.0/5.8L engines.
Fleet Mechanic
Joined: Nov 2022
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Hotshot
Joined: Jul 2020
Posts: 10,529
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From: Near Salt Lake City
Most of the time we see aftermarket EVP sensors with the shaft too long to work on factory EGR valves. In those cases you have the option to shorten it. Since yours is too short, I would return it then find a Ford/Motorcraft version or a higher quality aftermarket. I believe the EVP sensor is the same for the 4.9/5.0/5.8L engines.
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BroncoScott
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
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Apr 20, 2002 10:25 AM
