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Zero cost reversable electrical EGR delete
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07-07-2017, 10:29 AM | #1 |
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Zero cost reversable electrical EGR delete
Yet another EGR delete thread but I just had to share this one as it works really well and can be easily reversed for those of us in emission testing regions.
Credit for this discovery goes to TDIwyse who mentioned the effect of no EGR valve feedback in another thread (searched but couldn't find it) but didn't include how to implement the mod in that thread ( apologies if implementation was explained in another thread and I missed it ). ***Update 15May19: This mod has been successfully tested on the E9x platform. Tests by xpro indicated that is it NOT a safe mod for the F30 platform. I initially blocked my EGR at the EGR valve body with a copper disc. While it worked, I noticed a mileage decrease, frequent DPF regens and multiple codes thrown ( 45B7 , 4862 , 4B82 ). Electrially disconnecting the EGR valve entirely results in limp home mode BUT electrically disconnecting the feedback sensor (hall effect sensor I believe) implements the effect TDIwyse discovered. EGR utilization is now always zero and only a single code is thrown ( 4CAE ). Mileage increased from 9.2l/100km to 8.4l/100km (dash reading) or about 100km more per tank. That's with a 70/30% highway/city driving ratio and AC usually on. These results are from my X5 35D which I drive like a normal human being. The 335D is WOT every chance I get Instructions Disconnect the connector from the EGR valve motor. There is a pink plastic terminal restraint in the connector that needs to be shifted laterally towards pin #1 of the connector. You can just barely see it in the photo below. It's in the locked position. I used the metal pick in the photo to slide it aside. This requires very little force. With the pink terminal restraint unlocked, partially unbend a paperclip and fully insert the wire into the SMALL hole beside the pin #5 terminal. Now gently pull the wire (black) and terminal out from the back of the connector. Slide the pink terminal restraint back into the locked position after removing the terminal or it won't go back into the EGR valve motor. Insert the connector back into the EGR motor. That's it. The EGR valve will now never open. Reverse these instructions if you're going in for an emission test but do it well in advance to allow time for the DDE monitors to become "ready". While this is effective as an EGR delete, I still recommend removal of the EGR cooler with blocking at the exhaust manifold and the coolant bypass. I've had two of these EGR coolers crack. They are failure prone and a reliability concern. Last edited by torqueisking; 05-15-2019 at 10:47 AM.. Reason: included warning against use on F30 platform |
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07-07-2017, 10:49 AM | #2 | |
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07-07-2017, 12:49 PM | #7 | |
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Bottom line, it shouldn't increase the maximum temp the EGR cooler is exposed to and not make it any more prone to crack. |
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Kyle335D8.50 |
07-07-2017, 12:53 PM | #8 | |
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4CAE code illuminates the engine check light as most drive-train malfunction codes do I believe. |
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07-07-2017, 12:56 PM | #9 |
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07-07-2017, 12:59 PM | #10 |
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07-09-2017, 11:44 AM | #11 |
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Sorry guys. I forgot one important detail (actually did this mod many weeks ago ).
There is a pink plastic terminal restraint that needs to be shifted laterally towards pin #1 of the connector. You can just barely see it in the second photo. It's in the locked position. I used the metal pick in the photo to slide it aside. This requires very little force. Slide it back into the locked position after removing the terminal or it won't go back into the EGR valve motor. Last edited by torqueisking; 07-10-2017 at 07:03 PM.. Reason: now added to the OP |
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07-10-2017, 11:30 AM | #12 | |
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a suggestion, go back and edit your original post to include the pink clip, just to keep all the instructions in one place... |
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civilator4.00 |
07-10-2017, 06:58 PM | #13 | |
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07-20-2017, 09:54 AM | #14 |
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Mileage Update
With a 2hr road trip last week (A/C operating), my average mileage is now 7.6L/100km (about 31 mpg US) and I'm over 900KM with a little less than a 1/4 tank left.
This is definitely better mileage than with the EGR active. |
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07-20-2017, 10:20 AM | #15 | |
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With the coolant lines still there the static gas inside the cooler and pipe would be close to coolant temperature. |
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07-30-2017, 11:33 AM | #16 |
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hey i am not sure, if i understand what is the procieger. what is the paper clip? do u insert it into that one slot there on the side, so basically you going to cut the current in that one whole right? or? i don't even know what is a paper clip
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07-30-2017, 01:02 PM | #17 |
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E7J3F331.00 Drifter2090922.00 |
07-30-2017, 04:17 PM | #19 | |
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07-30-2017, 05:49 PM | #20 | |
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The way Im understanding it is that once you slide the little lever, you can push that connection out of the plastic plug entirely with said paperclip.... |
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07-30-2017, 05:55 PM | #21 |
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Just reread the thread. That's EXACTLY what you're doing. The paper clip doesn't just stay in there. It's used to remove that connector from the plug.
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