I'm new here and trying finding a post about it but could only get Ai to help me out. I got the lvl 2 tune and have hfc and a custom exhaust to the tips. The first file they sent was fine, after I sent the pulls and got the new file it was fine until about 30 min of driving and once I left a drive through it started ticking real loud with light acceleration. I called z1 and they tried to say it wouldn't be the tune and sent a new file. Before I refreshed to it I parked, refreshed the old one and it seemed to be fine but down the road around gear shifts it'd happen again. I then refreshed to the newer one and no fix. Only thing I could see is that its most likely the injectors and hundreds have been complaining about the same thing. That they made a more aggressive tune this year and its been messing with ours cars?

 

Check out Eugene with Enthusiast Autocare for an independent tune review! He re-tuned my car from a previous tuner remotely and later on the Dyno and the car runs amazing. Ive been tuned since 130k miles and am 240k miles now and it still runs better than new.

Let me if you want any more info on him. Here's his site:
https://vq37tt.com/products/remote-s...e-consultation

For an independent tune review - it sounds like he is having pinging / knock, or pre ignition