OK so i just had my car retuned, it has a Cusco hyper single clutch, GP moto short intake, TBE, and perrin crank pulley, STi timing belt. i just drove it down to california and everything was fine until about 3/4 of the way down my cruise control started turning it self off, the first few times i thought i hit the button but i didn't it would just shut off like i hit the cancel button, the green cruise light would stay on and i have not check engine or flashing cruise, so it kept getting worse and worse it was shutting off after about 20 min then it got to the point that if i turned it on it just shut off right away. whats wrong with my car?



Thank you

 

I would have the tuner look at it. It could be something to do with the ECU

 

Agreed, when you have something as extensive as a tune done, I would begin troubleshooting there

 

Check the stop light switch under the brake pedal, too. Doesn't sound exactly like your behavior, but I had a problem with mine that would shut off cruise (registering spurious braking events).