I want to take a minute to share my experience trying to reverse the Diesel Fix in my 2014 Touareg.
Car has barely 20K miles.
I bought it 6K miles ago with a 2-year warranty from a VW Dealer, which means the car had been “fixed”.
Since day one the car performed badly at low speeds 10-50 mph (suburban speed), due to the constant gear shifting. At highway speed the car was working ok, or at least there was not a visible problem.
Step 1: TCM
I bought a used European TCM (from Germany) and send it to YRKTREG, that very kindly flashed it for me.
I didn’t send him the one I had at the car, because I didn’t want to wait for the loaner program or be without the car for some days. Additionally, I wanted to keep the original one, in case I have to take the car to the dealer (still 15 months of warranty).
The new TCM solved some of the abrupt gear shifting and helped to keep the gears lower. It was something needed to be done.
Unfortunately, the ECU of the car had its own plans and kept working weirdly. Every time the car went over a bump and that slightly moved my foot from the throttle, or the car decelerated (gear shifting down) the car was acting weird. I felt like if the ignition was being cut off for a second to avoid the engine breaking. This is just an assumption. Anyhow it made the driving uncomfortable, especially for such a heavy car.
Step 2: ECU
YRKTREG still hasn’t come up with a remote reprograming of the ECU (as far as I know). After some research I came to the conclusion that the best option was to buy a Malone Kit.
These are Kits to tune up the car. You can go from moderate to crazy. I went for the lowest option (290 hp) that doesn’t require any hardware change (exhaust, etc.) This is a Stage 2 kit. It is pricy, about 800 usd, but allows you to set it back to original set up if wanted.
The Stage 2 is an “off road” only, so if you live in a state with emission keep that in mind. I live in Florida so no big deal. Malone assured me that the Stage 2 kit would improve the performance and make the car run better, so you don’t have to drive full throttle to feel the difference.
Once the Stage 2 was installed, I reset the TCM as well, in order to clear all variables.
The stage 2 brought a substantial increase in the performance, the car feels more sporty and definitely has more power. After 100 miles, I have started to feel a little bit the issues I had earlier: When the throttle pedal is suddenly released (Not pressed) the car acts weird. It is not definitely as bad as it used to be, and now it doesn’t seem to shutoff the ignition, but the deceleration is very strong. This is felt much more at low speeds (10-50 mph).
The drive is better that what it was after updating the TCM, but it is still not 100%, I would say is not even 75% of how the car should drive.
My questions/doubts…. If anyone wants to help… Is it anything else wrong that I have missed? Throttle? Any other programing to be done? I have a VCDS, but I don’t know what to modify.
PS: Thanks YRKTREG for your great work