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Discussion Starter · #1 ·
22k on truck and EGR valve is black and nasty, almost plugged off..........I have a pic but this site wont let me post a pic for some stupid reason
 

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I believe it. Between the oil sludge in my intercooler pipes from the pcv breather and then the egr on top of that I can imagine what buildup is in there
 

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Discussion Starter · #3 ·
EGR.png
OK it finally let me load a pic
 

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Fwiw, GDE (green diesel engineering) is releasing a tune (which isn’t green) which will disable the EGR and the DEF system. Nothing will need to be removed or unplugged and the truck will function normally and still regen etc.

So you get none of that gunk in your intake without having to do a full on delete.
 

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Discussion Starter · #6 ·
please keep us tuned when that comes out
 

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In all honesty, I am probably going to keep my emissions intact tunes and clean my intake at 30k, 60k and trade it in at 90k
 

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Fwiw, GDE (green diesel engineering) is releasing a tune (which isn’t green) which will disable the EGR and the DEF system. Nothing will need to be removed or unplugged and the truck will function normally and still regen etc.

So you get none of that gunk in your intake without having to do a full on delete.
If the truck still goes through regens, it will still build up crap in the DPF though (and possibly the EGR, but not sure about that?). I could see turning off that stuff and leaving it intact. It wouldn't continue to build up crap (as fast at least), but I don't see how the tune can turn it off and yet the stuff still work?
 

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If the truck still goes through regens, it will still build up crap in the DPF though (and possibly the EGR, but not sure about that?). I could see turning off that stuff and leaving it intact. It wouldn't continue to build up crap (as fast at least), but I don't see how the tune can turn it off and yet the stuff still work?
EGR is meant to reduce nox levels by lowering the combustion temps and reburnjng some of that exhaust again. Def also reduces Nox by being injected into the SCR. Turning off the EGR would make your noX levels go up, which would make your DEF consumption go way up. DEF only handles NOX. DEF has nothing to do with regens or the DPF so those function normally catching soot and burning it off. This is still not a legal tune because it defeats the emission systems and makes your nox levels go up. The only benefit to running this tune is having the EGR closed in conjunction with the normal power gains you get from the tune.
 

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It will just keep doing it. It’s probably not easy to get to. Think I MIGHT clean it once and then I would either delete the truck or sell it if I couldn’t delete or deal with cleaning it.
 

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Just bought a new Colorado ZR2 Diesel. Started using a fuel additive that's supposed to reduce this kind of buildup. Anyone had any experience with additives, good or bad? (sorry for the thread jack!)

Thanks,

Dave
 

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I just installed an oil filter by pass kit. It is supposed to reduce the amount of blow by crap in the oil and reduce the EGR build up.I also put in an oil catch can to help reduce the oil being fed back into the intake. I have a 2017 colorado diesel it has about 15K miles on it. I use diesel kleen every fill up or an equal. I hope its not to late at this stage to realize any benifits from these changes Its to early to tell. I would have done them sooner if i had known about this stuff.. Its my first diesel so its all new.to me. I have not had any issues with this truck so far and only brought it back to the dealer twice for the two different recalls they had for reprograming some emission problems they said were popping up. I bought one of those code thingys that you plug in and there were only 3. One was from when i unplugged the inlet air temp sensor to install the oil catch can and the other two had something to do with a barometric sensor code. Maybe thats what the dealer fixed with the program upgrade. No def problems other than worrying about the fluid in the tank degrading and causeing clogs, I wish there was a way i could drain the tank myself periodically so i could put fresh fluid in there, I got a maint manual on line so i am searching thru it to find out, It has over 11,000 pages and covers 2017-2018 colorados and canyons. So the journey continues
 
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