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Discussion Starter · #1 · (Edited)
I know this is probably a long shot. But is there anyway to tune and deleting in 2021.
Around 46,000 miles I got a warning for 65 top speed after so many miles. Took it to the dealer, they said the def system needs replace. My truck is a 2018 Chevy Colorado Z71
 

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There is currently no tuning support for 2021. We are working with EFI Live to have their tools working correctly on it. Maybe in a few weeks options will start to open up.
 

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Discussion Starter · #3 ·
There is currently no tuning support for 2021. We are working with EFI Live to have their tools working correctly on it. Maybe in a few weeks options will start to open up.
I'm looking for 2018 applications sorry if that was confusing
 

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Not to thread hijack, but didnt want to make a thread for a simple question.

If you get rid of the DPF/EGR, does that do away with having to use def fluid?
 

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Discussion Starter · #5 ·
Not to thread hijack, but didnt want to make a thread for a simple question.

If you get rid of the DPF/EGR, does that do away with having to use def fluid?
I'm not very knowledgeable about this kind of stuff. The truck won't know when to regen and won't work properly without the DPF AND EGR
 

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I'm not very knowledgeable about this kind of stuff. The truck won't know when to regen and won't work properly without the DPF AND EGR
Im pretty sure the tuner you would use, after getting the stuff off the truck would allow the ecm to not regen at that point.
 

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Discussion Starter · #7 ·
Im pretty sure the tuner you would use, after getting the stuff off the truck would allow the ecm to not regen at that point.
Yeah I was saying if you didn't have a tuner. I would like to learn more about this kind of stuff and possibly have it done if that's possible at this day and age.
 

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Yeah I was saying if you didn't have a tuner. I would like to learn more about this kind of stuff and possibly have it done if that's possible at this day and age.

Hi Nick, the DPF is in the exhaust system as is the DEF injector and associated catalyst components.

The EGR directly has nothing to do with either of these. If you were to just shut off your EGR (via tuning) without addressing NOX, which is what the DEF fluid reduces, the NOX sensor would tell the DEF injector to use an absorbent of DEF fluid to reduce the NOX levels in the exhaust stream. When the tuners used to address the EGR they would make changes to the DEF injection rate to compensate the higher NOX levels emitted by the exhaust. They did this to keep DEF at a manageable level of use.

Shutting off the EGR keeps the intake from getting clogged up with soot and because of the reduced soot level in the exhaust stream it also keeps the DPF from regenerating as often. When the DPF gets clogged to a particular level the ECM turns on a fuel injector that's in the exhaust just before the DPF filter. This causes the filter to get up to over 1000 deg and burn off the soot which is mostly carbon. You will notice you instant fuel mileage drop during regeneration (usually for about 15 minutes or so at hwy speeds).

Hope this helps....
 

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Discussion Starter · #9 ·
Hi Nick, the DPF is in the exhaust system as is the DEF injector and associated catalyst components.

The EGR directly has nothing to do with either of these. If you were to just shut off your EGR (via tuning) without addressing NOX, which is what the DEF fluid reduces, the NOX sensor would tell the DEF injector to use an absorbent of DEF fluid to reduce the NOX levels in the exhaust stream. When the tuners used to address the EGR they would make changes to the DEF injection rate to compensate the higher NOX levels emitted by the exhaust. They did this to keep DEF at a manageable level of use.

Shutting off the EGR keeps the intake from getting clogged up with soot and because of the reduced soot level in the exhaust stream it also keeps the DPF from regenerating as often. When the DPF gets clogged to a particular level the ECM turns on a fuel injector that's in the exhaust just before the DPF filter. This causes the filter to get up to over 1000 deg and burn off the soot which is mostly carbon. You will notice you instant fuel mileage drop during regeneration (usually for about 15 minutes or so at hwy speeds).

Hope this helps....
Yes this did help thank you. My truck has under 50,000 and the emissions is all ready giving me troubles
 

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I know this is probably a long shot. But is there anyway to tune and deleting in 2021.
Around 46,000 miles I got a warning for 65 top speed after so many miles. Took it to the dealer, they said the def system needs replace. My truck is a 2018 Chevy Colorado Z71
I was thinking the way Chevy onstar and on board wifi system tracks everything on the truck. Any mods you do will pop up at the chevrolet onstar system. Warrenty will instantly be voided. Not sure about american version but in south america Onstar can remotely disable the engine for anti theft etc. This means big brother is watching you at all times when driving, modifying the truck.
 

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I was thinking the way Chevy onstar and on board wifi system tracks everything on the truck. Any mods you do will pop up at the chevrolet onstar system. Warrenty will instantly be voided. Not sure about american version but in south america Onstar can remotely disable the engine for anti theft etc. This means big brother is watching you at all times when driving, modifying the truck.
They don't see modifications but they do see when trouble codes get set.
 

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I know this is probably a long shot. But is there anyway to tune and deleting in 2021.
Around 46,000 miles I got a warning for 65 top speed after so many miles. Took it to the dealer, they said the def system needs replace. My truck is a 2018 Chevy Colorado Z71
Not sure if this helps but as I recall the warranty coverage for the emissions system is 70 or 80k miles. Supposed to cover all major components.
 

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Discussion Starter · #13 ·
Not sure if this helps but as I recall the warranty coverage for the emissions system is 70 or 80k miles. Supposed to cover all major components.
Yeah Chevy is taking care of it all, I'm not paying a dime 👍
 

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Not to thread hijack, but didnt want to make a thread for a simple question.

If you get rid of the DPF/EGR, does that do away with having to use def fluid?
Yes. If you do an emissions delete, you essentially "strait pipe" from the turbo back. Therefor removing your DPF, regen cycles, and the need for DEF. However; if you simply delete your EGR and leave the rest intact, you'll use up much more DEF to compensate for the increased emissions and more than likely get some engine codes.
 

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I am kinda upset about the def stuff. Ever since i found out that def fluid has a shelf life i bought a tester to keep tabs on it in the truck. Once i open a jug to fill the def tank i throw away any thats left because heat and storage accelerates the decay of the fluid. Now i wonder about whats in the truck already. I havent been driving enough to use the fluid fast enough. If it degrades and crystalizes and clogs up that system. I heard its very expensive to have a dealer clean and refurbish it. I was perfectly happy to comply with using that system but i dont want to be held hostage to the possibility of a big bill to fix it if the fluid goes bad. I live in florida and heat is supposed to be a major cause of the fluid degrading. I want to know if there is just some sort of drain on the def tan so i can change out the contents regularly. I think it only holds about 5 gall9ns and i never have had to add more than 2.5 gallons. If the system ever defaults and leaves me stranded i will do a delete rather than pay the dealer to fix it. The only problem would be finding a tune to keep the computer happy afterwards. With the epa prosecuting tuners i dont know how i would find one to tune for a delete. For now i have added an oil catch can to reduce the oil being sucked into the intake from the PVC system and also i just added an Oil by pass system to help reduce the blow by carbon that goes back to the EGR. Hopefully these additions will prolong the life of the systems involved. I have thot about an EGR delete but dont know enough yet to find whether to just use a block off plate or buy some sort of kit. Plus I suppose if i do that it will thro a check engine lite and Ill have to find someone to tune for that as well, Its getting more difficult to be happy with a diesel these days. I may just be over reacting but I think all the EPA stuff that is supppose to be benificial is just making the engines less and less reliable. Do you think the days of a 250,000 mile diesel is long gone??
 

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I am kinda upset about the def stuff. Ever since i found out that def fluid has a shelf life i bought a tester to keep tabs on it in the truck. Once i open a jug to fill the def tank i throw away any thats left because heat and storage accelerates the decay of the fluid. Now i wonder about whats in the truck already. I havent been driving enough to use the fluid fast enough. If it degrades and crystalizes and clogs up that system. I heard its very expensive to have a dealer clean and refurbish it. I was perfectly happy to comply with using that system but i dont want to be held hostage to the possibility of a big bill to fix it if the fluid goes bad. I live in florida and heat is supposed to be a major cause of the fluid degrading. I want to know if there is just some sort of drain on the def tan so i can change out the contents regularly. I think it only holds about 5 gall9ns and i never have had to add more than 2.5 gallons. If the system ever defaults and leaves me stranded i will do a delete rather than pay the dealer to fix it. The only problem would be finding a tune to keep the computer happy afterwards. With the epa prosecuting tuners i dont know how i would find one to tune for a delete. For now i have added an oil catch can to reduce the oil being sucked into the intake from the PVC system and also i just added an Oil by pass system to help reduce the blow by carbon that goes back to the EGR. Hopefully these additions will prolong the life of the systems involved. I have thot about an EGR delete but dont know enough yet to find whether to just use a block off plate or buy some sort of kit. Plus I suppose if i do that it will thro a check engine lite and Ill have to find someone to tune for that as well, Its getting more difficult to be happy with a diesel these days. I may just be over reacting but I think all the EPA stuff that is supppose to be benificial is just making the engines less and less reliable. Do you think the days of a 250,000 mile diesel is long gone??
Only time will tell on the 250K but that's a loaded question. Will the motor last, most likely yes, how much $ will you have to spend on the exhaust BS in order to keep is running is a whole other question.

As far as the EGR goes you will have to find a private tuner or use one out of this country thanks to the D-Bags at the EPA. If you unplug it you will surely cause a limp mode event soon after. From reading, the vehicle has to be in good standing prior to doing a delete or you will have a fight to clear the code after the fact.
 

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Only time will tell on the 250K but that's a loaded question. Will the motor last, most likely yes, how much $ will you have to spend on the exhaust BS in order to keep is running is a whole other question.

As far as the EGR goes you will have to find a private tuner or use one out of this country thanks to the D-Bags at the EPA. If you unplug it you will surely cause a limp mode event soon after. From reading, the vehicle has to be in good standing prior to doing a delete or you will have a fight to clear the code after the fact.
You are correct. There is a guy on utube in canada who has been doing all the delete modifications to his diesel colorado. He doesnt go into detail about who did the tune but i bet its that company that is mentioned here. I just got my cat-back kit and will put it in today. I always thot there was a muffler under there but all i see is the DEF and the catylitic converter. No muffler in sight. The DEF thing has at least 4 connections to it. It looks like a scientific experiment in progress. I doubt I could take it out without a bunch of check engine lights anyway. My truck is a 2017 and i bought it new. I had to take it back twice for recalls concerning the emmision stuff. They reprogramed it both times. I havent had any problems with it at all but it only has about 15k miles on it. I am going to email that Canadian company and see what they have to offer. If there is any problems with their tune I beleive they will have them sorted out by the time i get around to doing a delete. For now as long as the DEF doesnt screw me I will continue as is. I really like this truck and dont want to replace it. Ironically the catback system came from a company that sells all the brands and is located in Canada. I couldnt find a MagnaFlo kit in the states and Magnaflo told me its out of stock and they wont be making any more for over two months.
 

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You are correct. There is a guy on utube in canada who has been doing all the delete modifications to his diesel colorado. He doesnt go into detail about who did the tune but i bet its that company that is mentioned here. I just got my cat-back kit and will put it in today. I always thot there was a muffler under there but all i see is the DEF and the catylitic converter. No muffler in sight. The DEF thing has at least 4 connections to it. It looks like a scientific experiment in progress. I doubt I could take it out without a bunch of check engine lights anyway. My truck is a 2017 and i bought it new. I had to take it back twice for recalls concerning the emmision stuff. They reprogramed it both times. I havent had any problems with it at all but it only has about 15k miles on it. I am going to email that Canadian company and see what they have to offer. If there is any problems with their tune I beleive they will have them sorted out by the time i get around to doing a delete. For now as long as the DEF doesnt screw me I will continue as is. I really like this truck and dont want to replace it. Ironically the catback system came from a company that sells all the brands and is located in Canada. I couldnt find a MagnaFlo kit in the states and Magnaflo told me its out of stock and they wont be making any more for over two months.
See the attached, it will help you identify the components. There are al lot of pieces to the science experiment.
 

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See the attached, it will help you identify the components. There are al lot of pieces to the science experiment.
Thanks for sending it. I cliked on it but it wouldnt display. Probly something to do with my computer. Its always doing stuff like that. Ill save this post and try again when i get my new computer.
 

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it's just a PDF, I use Foxit reader because Adobe has become to bloated. you can find it here if you wish.
 
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