I have the stage 3 power pack I installed back in July. That comes with a basic tune just so everything functions properly. I didn't have issues with starting until about a month and a half ago.
Have a 2016 Mustang GT that just hit 40k miles. Lately I noticed the warmer it is outside It's struggling to start. It happens often but not every time. I am noticing it getting worse though over the last couple weeks. Turns over for up to 3 seconds. Car seems to drive just fine. Any ideas...