Sebastian Vettel is down to four power units for the remaining 19 races this year, following his smoky retirement on the parade lap in Bahrain. Earlier, the Ferrari media insider Leo Turrini said the problem had been traced to an injector, but he now clarifies that the fault was actually caused by 'a bug on the electronic mapping'. That is good news for the Maranello team, as the fix will presumably be easier. 'It was an electronic problem rather than the failure of a mechanical part,' agreed a report in La Repubblica newspaper. The report explained that the electronic glitch occurred in a certain gear at precise revs 'causing a sort of blackout that affected the engine' so badly that it...
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