Caterham's difficult season continued as both drivers suffered technical issues during practice for the German Grand Prix.
Marcus Ericsson suffered an oil pressure problem in the CT05 but was able to return to the circuit and set the 20th fastest time.
But team-mate Kamui Kobayashi's day ended early after he pulled to the side of the circuit with flames trickling from the back of his car.
"The car balance felt much better with the changes we made over lunch but it immediately felt like it was down on power, it just felt strange," Kobayashi said of his outing during second practice.
"We made a couple more mechanical changes and went back out for run two but at the end of the second lap I lost any braking power and could smell burning.
"I pulled over as the rear of the car was by then on fire and ran to grab and extinguisher so I could help to put the fire out, but that was obviously the end of the session. It looks like it was a fuel leak that started the fire but we need more time tonight to find out exactly why that happened and then fix it."
Kobayashi remained upbeat despite his premature end to the session.
"Despite how FP2 went I’m still pleased with how the car felt today, especially in the first run I did in the afternoon," he said.
"If we can have more solid reliability I think we could have a better weekend than we’ve had for a while – now everyone will work as hard as possible tonight to help us do just that."