Puras began competing in rallying in 1982 and established himself as a dominant force in Spanish domestic competition over the following decade. His natural ability on sealed-surface roads made him a consistent threat on tarmac rallies throughout his career.
Puras captured the Spanish Rally Championship title eight times. He took the title in 1990 and 1992 driving a Lancia Delta Integrale 16V, then claimed it again in 1995 and 1997 with a Citroën ZX 16S. Between 1998 and 2000 he won three consecutive championships in a Citroën Xsara Kit Car, and he added a further title in 2002 with the Citroën Xsara WRC. Alongside his national successes, he won the 1994 FIA Group N Cup — now classified as World Rally Championship-3 — driving a Ford Escort RS Cosworth.
Puras made his WRC debut in 1991 and competed periodically on the world stage over the following decade. His most significant international role came when Citroën selected him and teammate Philippe Bugalski to form the driver line-up for the manufacturer's first full WRC campaign with the Citroën Xsara Kit Car in 1999.
The partnership with Citroën continued into the WRC era with the Xsara WRC. Puras demonstrated the calibre of his tarmac driving throughout this period, and his victories on Spanish roads translated into genuine pace on the world stage.
Puras secured his only WRC win at the 2001 Tour de Corse, the classic all-tarmac event held on Corsica. He drove a Citroën Xsara WRC with co-driver Marc Martí, taking victory on one of rallying's most demanding events. The result confirmed that his exceptional pace on sealed surfaces could translate into outright wins even against world-class competition.
Puras remained with Citroën for the 2002 season but struggled to maintain his standing within the team as Sébastien Loeb's emergence began to overshadow the established drivers. He retired from the Citroën factory team and from WRC competition after the 2002 Rallye Sanremo, where he finished sixth. His departure marked the end of an international career that had been defined by tarmac speed and Spanish domestic dominance rather than a sustained world championship challenge.
Puras is remembered as one of the finest Spanish tarmac rally drivers of his generation. Eight Spanish national titles and a Tour de Corse victory attest to a career spent at the front of domestic and international competition on sealed surfaces. His co-driver Marc Martí subsequently went on to serve as co-driver for Carlos Sainz and later Dani Sordo, carrying the connection to the Citroën rally programme forward into subsequent generations.