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Old 07-04-2019, 07:29 AM
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3.8l EGR delete gained mpg

I saw a comment in an old thread about pulling the EGR pipe up and crimping the end shut and they said they gained 2 mpg after doing this. I tried reaching the commentor but they may not be active anymore. Does anyone know if this really works?

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Old 07-07-2019, 01:35 PM
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I saw a comment in an old thread about pulling the EGR pipe up and crimping the end shut and they said they gained 2 mpg after doing this. I tried reaching the commentor but they may not be active anymore. Does anyone know if this really works?
Bumping up since I shouldn't have posted on July 4th when everyone is out having fun. Would really like to know if this works and if there are any cons to this.

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Old 07-07-2019, 01:38 PM   #3
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It would depend on laws where you live. Defeating or modifying any emissions-related equipment can attract fines or even prevent your vehicle from being licensed for on road usage in many jurisdictions.
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Old 07-07-2019, 01:43 PM
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It would depend on laws where you live. Defeating or modifying any emissions-related equipment can attract fines or even prevent your vehicle from being licensed for on road usage in many jurisdictions.
I get that. The post I saw indicated to pull the EGR pipe up out of the intake, crimp it and there would be no evidence that it has been "deleted". I would like to know if there really is any gain to this and if any check engine codes would be thrown, mileage gains, etc.
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Old 07-07-2019, 01:49 PM   #5
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I get that. The post I saw indicated to pull the EGR pipe up out of the intake, crimp it and there would be no evidence that it has been "deleted". I would like to know if there really is any gain to this and if any check engine codes would be thrown, mileage gains, etc.
These are potential codes that may be thrown:

P0401 - Egr System Performance
P0403 - Egr Solenoid Circuit
P0404 - Egr Position Sensor Rationality Open
P0405 - Egr Position Sensor Circuit Low
P0406 - Egr Position Sensor Circuit High

Link to post you are referring to?
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Old 07-07-2019, 02:01 PM   #6
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The main reason I am leery of such mods?

Many years ago, I had a number of vehicles purchased with various emissions parts defeated or bypassed- some due to parts availability, some due to performance problems. It was relatively common to remove emissions equipment and backdate engines to pre-emissions control specs. Doing so was a non-issue, at least until they instituted mandatory emissions testing where I live and an emissions test "pass" became required to license the vehicle.

One of my favourite vehicles at the time was an older British roadster. The air pump (an OEM emissions component) seized. The fix? Remove the belt. I ran it for years like that, until the aluminum bracket integrated in the cast pump housing broke. The fix? Remove the entire assembly, and block off air inlets for the lines on the intake. When they put mandatory emissions testing in place, I had to look for a replacement pump (non-existant anywhere local as most had been removed and discarded, with the only replacement having to be ordered from the UK for $1800 plus shipping). That vehicle never saw the road again. Laws change, and they even come and go. If you are attached to the vehicle, you may want to avoid what could be an expensive fix to regain compliance.
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Old 07-07-2019, 02:05 PM   #7
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Old 07-07-2019, 02:12 PM
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Thanks for the input. Doesn't sound like it will do anything positive for me so I'll skip this one.

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