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Hi guys, I have a quick question. My car currently have Ecutek Racerom without the tune but I have a COBB AP tuner with tune inside. Do I need to unmarry Ecutek before I can tune with the COBB AP? Cause currently when I tried to install tune it says "Cannot communicate with vehicle". Need help with this thank you.
 

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Yes unmarry atleast the ECU tune - unmarry both ECU and TCM if you are using a Cobb transmission that.

You can run separate TCM tunes FWIW.
 
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