Originally Posted by GaijinEvoX
Starter motor my first thought?
Doesnt sound like a starter issue. More like ignition.
As mentioned above, you're likely wasting your time at mitsu.
Where do you live in Japan, there are tons of reputable tuning shops, but ideally try and found out where the car was built.
Failing that, find a tuner that builds evos and have them start from scratch.