"We worked hard yesterday to make the changes it was felt were necessary to overcome the problems we identified and we were hopeful of a more successful day today," said race engineering co-ordinator Andy Damerum. "Unfortunately, the measures we took only partially solved the issue and, as with yesterday, it's more sensible to stop and dig deeper into finding a solution."
The issues are a major setback for Red Bull who seem well behind their title rivals with only nine more days of testing to come before the season begins at the Australian Grand Prix in Melbourne on March 16.
It was a contrasting story for Denmark's Kevin Magnussen, who stole the show on his first outing in the McLaren. Magnussen took over from teammate Jenson Button, who had gone fastest in the morning, for the afternoon session and bettered the Briton's mark with an effort of 1m 23.276s.
Williams' Felipe Massa was second fastest with Lewis Hamilton third as the Mercedes continued to pile on the miles. While he didn't match teammate Nico Rosberg's mammoth 97-lap effort from Wednesday, Hamilton was the busiest man on the track as he went around 62 times.
Despite a fine start to his Formula One career, Magnussen believes it is laps completed rather than times that is the key so early in the season.
"Obviously I'm very happy about what we did and I'm especially happy about the laps we got in, but I am not really looking into lap times at the minute," he said.
Another former champion, Fernando Alonso, also made his first appearance of the season in the Ferrari F14-T. The Spaniard's arrival drew a much larger crowd than in the previous two sessions. Ferrari enjoyed another good day as Alonso finished fifth fastest after 58 laps.AAP
