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Weird problems 99' A6 1.8T Me 7.5
#1
Hello,
I dont really know where to write this, but here goes.

Bought a car about a week ago.
I have had 2 people send me stage 1 files. Car can only be read/written in boot mode. With the stage 1 files, the car starts kangarooing, shaking and going crazy, totally undriveable.
On this forum, I got an LC /NLS file, that is working on another car with the same ecu, the problem is that it does not work in mine. AND!!!!: the car starts doing same things like with stage 1 files, hesitating, kangarooing etc... althou this file does not have any tuning done to it.

I also removed immobiliser from ecu to remove obd protection, but kess still can read id, but upon reading gives an error : "This ecu cannot be read"

This gets weirder as with ori file flashed on it, the car runs great without any issues.

has anyone experienced similar things?


Car info : 99 audi A6 1.8T APU.
only mods so far: bypassed N249

HW: 0261206042
SW: 1037350228
Engine: 1.8L R4 5VT
SW upg.: 4B0906018 0004


As i understand that any type of modified file, drives this car crazy.
Any ideas or should I agree that the car is cursed? Big Grin
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