Virgin Racing endured a frustrating start to testing at Jerez on Wednesday, with Timo Glock completing just 10 laps.
While the squad had problems last week, the final day on Saturday was more positive and Lucas di Grassi managed 63 tours. However, the team 'experienced more of the rough than the smooth' yesterday when an 'elusive hydraulics problem proved hard to pin down'.
As a result Glock was unable to post a fast lap and most of the time was spent in diagnostic mode conducting a series of out-laps to try to flush out the root cause through the hydraulic system.
“We have experienced a sequence of hydraulic problems which were tricky to diagnose on a new car,” Virgin technical director, Nick Wirth explained. “This caused us to suffer long and frustrating periods confined to the garage and when we did venture out on track it was purely to conduct a series of exploratory out-laps to try to understand if we had cured the problem.
“We eventually discovered the real issue, albeit rather late in the day. Nonetheless, having fully identified the problem, we can fix it tonight and look forward to what we hope will be a more constructive day of running for Timo and the team tomorrow.”