Buried by My Bride, Back as the Racing King - Episode 4

Caleb, a tow driver, is confronted by the racing king in his garage. He is accused of never maintaining the car, which suffers from misfires, an overheating bearing, and a loose seat. The racer suspects the car has been sabotaged, pointing out that the fuel is dyed blue to track their tests. He realizes the tampering is not to watch the car but to monitor their actions, suggesting someone is waiting for them to open a mysterious archive.