I just wanted to get an idea from those of you who have had a stage 1 remap done (or beyond) on a TDi and went on to experience engine related problems. I've had stage 1 ECU map carried out recently only for the engine to develop a knocking noise after only 70 miles of driving. The car is being stripped as we speak and the tuner isn't accepting any responsibility but I'm very dubious considering the car ran perfect before the map and this problem started so soon afterwards. The car was only serviced 2 months ago.
What exactly is altered on the map that could have contributed to the knocking noise? My guess is something related to ignition timing causing the igniters to fail but I'm no expert in that field so would like to hear from anyone else on the matter.
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