Engine failure sidelined former Australian V8 Supercar champion Marcos Ambrose’s Toyota Camry mid-way through the Kobalt Tools 500 NASCAR Sprint Cup race at Atlanta, Georgia, on Sunday
He’d made a steady start to the race after qualifying 38th fastest, but lost a lap after being caught out with a green flag pitstop.
He was further delayed by a penalty after one of his pit crew crossed pitlane to retrieve a stray tyre after a pitstop.
"We blew up,” he said. “(I’m) not sure what went wrong there.
"We were trucking along there pretty good. We lost a cylinder for about 50 laps and then it finally went. I just hoped I didn't oil the track down for everybody else.
"It's been an unfortunate day for us. We had a lot of speed here in practice and it's just a shame that we couldn't convert.
"There are a lot of motor issues this year for all manufacturers. I don't really know, I'm just driving it. I'm not privy to the insides of the motors as to what's really happening.
"It's a shame for us, but we'll bounce back."