Everton caretaker manager Duncan Ferguson made an instant impact on the pitch and a spectacular one off it as he started his reign with a vital victory over Chelsea at Goodison Park.Ferguson is in interim control after Marco Silva was sacked following Wednesday's Merseyside derby thrashing at Liverpool that had left the Toffees in the relegation zone.And Everton banished their recent struggles to run out fully deserved winners on a thunderous occasion illuminated by the former striker's wild celebrations.The Scot raced down the touchline when Richarlison headed Everton in front from Djibril Sidibe's cross after only five minutes, then swung a ball boy around in the air when Dominic Calvert-Lewin took advantage of slipshod Chelsea defending to increase their lead four minutes after half-time.Chelsea frayed some nerves in the home crowd when Mateo Kovacic pulled one back from long range - but Ferguson was off down the touchline again when more awful defending from Frank Lampard's side allowed Calvert-Lewin to scramble his second through goalkeeper Kepa Arrizabalaga's legs with six minutes left.Ferguson and his players took the acclaim at the final whistle as the clouds over Goodison Park lifted.