Engine issues ended Busch's day early at Pocono.
Kyle Busch ended up in the garage following engine issues with the No. 18 Joe Gibbs Racing Toyota on Lap 24 at Pocono Raceway on Sunday.
“It’s the piston” Busch said over the radio. “I know what it is. You know what it is. Done.”
Busch qualified seventh on Saturday and was running in the top 10 before his car expired on Sunday.
After he climbed from the car, Busch offered a general explanaion that "it was something between the frame rails".
Busch, was scored 42nd after leaving the track. He entered the weekend sixth in the point standings. Busch has one win this season at Auto Club Speedway.