e90 330i problems

Deepu11

New member
I recently took out the cats from my car. Ever since then the car has been sluggish and tends to "miss"(like the coils where gone) now and then. I contacted Xcede performance to load a new map to fix the problem. Now it seems that the 05 model has Anti-tuning software. Can someone please advise me what to do
(the car seems to have low down power but up in the rev range its quite flat)
thanks in advance
 
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