Diesel tunes...
8th Gear
Joined: Apr 2026
Posts: 8
Likes: 0
Would be good to find out when you’re diesel fix occurred and at what mileage as you have four years 48,000 emissions warranty as well as 10 years 100,000 miles from the in-service state of the vehicle
If there is DPF issues, it would certainly be covered. There is a website where you can plug in your Vin and get the information. Other issues, such as oil leaks would also be covered. Fortunately, my Q7 also qualified for an engine out reseal.
If there is DPF issues, it would certainly be covered. There is a website where you can plug in your Vin and get the information. Other issues, such as oil leaks would also be covered. Fortunately, my Q7 also qualified for an engine out reseal.
Rennlist Member
Joined: Sep 2006
Posts: 1,153
Likes: 14
Tunes out there like tunezilla and some others have a smart EGR component. I think in short after the vehicle is warmed up and running it shuts it off. At some point I’d like to have the intake opened up and cleaned after adding the pipes and delete. From what I’ve heard they possibly can be a more noticeable smell from the vehicle. I am guessing I will live with this, as I did when I deleted a 2008 Mercedes GL 320 CDI. There was a noticeable difference after tuning and deleting in an initial turbo lag. Although with the TDI engine, I really don’t notice much. Currently, I am trying to find a facility or mechanic near Louisiana that has a lot of experience with TDI’s to do the delete. On my vehicle I think one of the bolts can be kind of difficult to access and my vehicle being a northern car has a bit of rust. Also not wanting to damage the flex pipe on the downpipe. So would like to have it taken out as efficiently as possible by someone who’s done it plenty of times.
8th Gear
Joined: Apr 2026
Posts: 8
Likes: 0
I agree DrZ1. I appreciate your feedback. The throttle body through the intake probably all needs cleaned based on the YouTube’s I watched. Kept them all if you would like to see them. I’ll dig further into the info you provided. Would live to speak to a tunezilla expert to talked through it. I’ve heard really good things and some people had terrible experience, not sure why the spread of results. What did they guys know that the others didn’t? You don’t know what you don’t know.
8th Gear
Joined: Apr 2026
Posts: 8
Likes: 0
Full delete pipes
What set of pipes are folks using for full delete jobs on 958.2? Looks like Tunezilla is the tuner.
found a shop who had done a similar job on a VW SUV 3.0. 3 pipe, or two preferably stainless.
found a shop who had done a similar job on a VW SUV 3.0. 3 pipe, or two preferably stainless.
Last edited by Ddang; Apr 20, 2026 at 11:35 AM.
Track Day
Joined: Apr 2026
Posts: 21
Likes: 4
This is a dumb question that I can ask them too, but since there's a lot of experience in here, i'd like to ask you all this. For Tunezilla tunes, if I buy a stage 2.5 for example and don't like it or it causes issues, can I flash it down to stage 2 or 1 for free or do I have to pay them per flash? Has anyone done a 2.5 tune? I'm seeing more 1's and 2's. I don't tow ever nor do I plan to do that's not an issue but I do have to keep my emissions things in place legally, but I will opt for the dynamic EGR as I am reading that helps a lot. I'll also be doing carbon cleaning every 10k miles along with the fuel filter services.
AutoX
Joined: Dec 2017
Posts: 11
Likes: 8
From: Wisconsin
This is a dumb question that I can ask them too, but since there's a lot of experience in here, i'd like to ask you all this. For Tunezilla tunes, if I buy a stage 2.5 for example and don't like it or it causes issues, can I flash it down to stage 2 or 1 for free or do I have to pay them per flash?
I just did their Stage 2 flash a few weeks ago plus the pre-Dieselgate TCU firmware and the car drives significantly better.
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Rennlist Member
Joined: Sep 2006
Posts: 1,153
Likes: 14
I thought I would post here as well for my plan for my Q7 tdi, there seems to be more people modifying the CD than I’m seeing on the current Audi forum. Interested if any additional recommendations
I have about nine months left on my Fidelity warranty, so my plan is to try to have the vehicle as dependable as possible. They found a facility (zinkwerks) outside of Dallas, I’m in Louisiana so it’s still probably a seven hour trip, that has a lot of experience with TDI’s. Currently, I’m working out a game plan for service. So far I’d plan to have them remove the EGR components, and put a witbred cp4 disaster, relief bypass in, remove the DPF and SCR pipes and tune. While the vehicle is there, I will have them go through and see if there’s anything else that needs doing that the warranty might cover.
Even though I had an engine out reseal, about 10,000 miles ago, I think there are still components with the EGR that could cause problems in the future. Also, while they have everything apart, I’ll be able to have them clean the intake. And in the future with the EGR components out, I should be able to monitor things under the intake better. Supposedly with the EGR an and exhaust components removed the car should drive much better. I was concerned about the warming up without the EGR but I was told that really would not be an issue nor the diesel smell too much as the owner had that same procedure done to his Q7. I had the DPF removed from my Mercedes GL 320 CDI and I did not find it to unpleasant, but I’m sure I will notice it a bit more with the sunroof down or at stoplights.
I have about nine months left on my Fidelity warranty, so my plan is to try to have the vehicle as dependable as possible. They found a facility (zinkwerks) outside of Dallas, I’m in Louisiana so it’s still probably a seven hour trip, that has a lot of experience with TDI’s. Currently, I’m working out a game plan for service. So far I’d plan to have them remove the EGR components, and put a witbred cp4 disaster, relief bypass in, remove the DPF and SCR pipes and tune. While the vehicle is there, I will have them go through and see if there’s anything else that needs doing that the warranty might cover.
Even though I had an engine out reseal, about 10,000 miles ago, I think there are still components with the EGR that could cause problems in the future. Also, while they have everything apart, I’ll be able to have them clean the intake. And in the future with the EGR components out, I should be able to monitor things under the intake better. Supposedly with the EGR an and exhaust components removed the car should drive much better. I was concerned about the warming up without the EGR but I was told that really would not be an issue nor the diesel smell too much as the owner had that same procedure done to his Q7. I had the DPF removed from my Mercedes GL 320 CDI and I did not find it to unpleasant, but I’m sure I will notice it a bit more with the sunroof down or at stoplights.
Rennlist Member
Joined: Oct 2006
Posts: 9,677
Likes: 345
From: CT
I thought I would post here as well for my plan for my Q7 tdi, there seems to be more people modifying the CD than I’m seeing on the current Audi forum. Interested if any additional recommendations
I have about nine months left on my Fidelity warranty, so my plan is to try to have the vehicle as dependable as possible. They found a facility (zinkwerks) outside of Dallas, I’m in Louisiana so it’s still probably a seven hour trip, that has a lot of experience with TDI’s. Currently, I’m working out a game plan for service. So far I’d plan to have them remove the EGR components, and put a witbred cp4 disaster, relief bypass in, remove the DPF and SCR pipes and tune. While the vehicle is there, I will have them go through and see if there’s anything else that needs doing that the warranty might cover.
Even though I had an engine out reseal, about 10,000 miles ago, I think there are still components with the EGR that could cause problems in the future. Also, while they have everything apart, I’ll be able to have them clean the intake. And in the future with the EGR components out, I should be able to monitor things under the intake better. Supposedly with the EGR an and exhaust components removed the car should drive much better. I was concerned about the warming up without the EGR but I was told that really would not be an issue nor the diesel smell too much as the owner had that same procedure done to his Q7. I had the DPF removed from my Mercedes GL 320 CDI and I did not find it to unpleasant, but I’m sure I will notice it a bit more with the sunroof down or at stoplights.
I have about nine months left on my Fidelity warranty, so my plan is to try to have the vehicle as dependable as possible. They found a facility (zinkwerks) outside of Dallas, I’m in Louisiana so it’s still probably a seven hour trip, that has a lot of experience with TDI’s. Currently, I’m working out a game plan for service. So far I’d plan to have them remove the EGR components, and put a witbred cp4 disaster, relief bypass in, remove the DPF and SCR pipes and tune. While the vehicle is there, I will have them go through and see if there’s anything else that needs doing that the warranty might cover.
Even though I had an engine out reseal, about 10,000 miles ago, I think there are still components with the EGR that could cause problems in the future. Also, while they have everything apart, I’ll be able to have them clean the intake. And in the future with the EGR components out, I should be able to monitor things under the intake better. Supposedly with the EGR an and exhaust components removed the car should drive much better. I was concerned about the warming up without the EGR but I was told that really would not be an issue nor the diesel smell too much as the owner had that same procedure done to his Q7. I had the DPF removed from my Mercedes GL 320 CDI and I did not find it to unpleasant, but I’m sure I will notice it a bit more with the sunroof down or at stoplights.
Rennlist Member
Joined: Sep 2006
Posts: 1,153
Likes: 14
Illegal motors are the best motors lol. I am interested in a tune that will also pass emission readiness when eliminating EGR and Adblue without having to remove components. Dunno is there is one available nowadays as I understand it. The older tunes were able to do that.
The only reason I am looking to delete the EGR, is to simplify all the point plastic components and hosing associated with it. Otherwise, I’d leave it.
Also makes it easier to spot other problems and have room for this CP4 disaster relief filter.