NC Miata w/ ECUTek RaceROM Issue P2108 – Throttle Actuator Control Module Performance
Hi all!
I have a 2009 NC2 Miata (Bone stock other than coilovers/tires/pads) got my ECU unlocked and "Tuned" by a well-respected tuner in the area, with ECUtek RaceROM features installed- no power, just RaceROM. He did some logging and some manual adjustments, made sure everything was running well, and went on my way. The car has been running really well overall. On the street and during spirited driving, everything works exactly as it should.
The only issue I’ve noticed has been under track conditions; the problem occurs when entering a corner on track. During braking and a downshift, as I begin to exit the corner, the car will suddenly cut the throttle and go into limp mode. I then have to quickly turn the car off and restart it. After restarting, the car drives normally again, but the CEL remains illuminated. The code I’m consistently seeing is:
P2108 – Throttle Actuator Control Module Performance
This happened intermittently over both of my track days. Other than these incidents, the car runs great.
What’s interesting is that the issue seems to occur exclusively under track-driving conditions. I haven’t experienced it on the street, even during spirited driving, or at autocross events.
My initial thought was to start with a throttle relearn and see if that helps going into next season.
Thank you all!