 Complete the following phrase:  After a further test at Jacarepaguá, the team made its competitive F1 debut in April 1983, at the non-championship Race of Champions at Brands Hatch. In a field of 13 cars, Johansson set the second-fastest time in free practice, but suffered engine problems in qualifying and started 12th. He then retired early with a punctured radiator following a collision with the Theodore of Roberto Guerrero. Following this, the team resumed its testing programme, with sessions at Silverstone, Brands Hatch and Donington Park, before making its World Championship debut in July at the 