Fuchs, from Peru, started the final day of the event on course for his first victory in the category with an advantage of 50.3s. However, he took 2m03.2s more than new PWRC leader Benito Guerra to complete the 65.74-kilometre Matadero/Ambul stage.
It means Mexican Guerra, in a Mitsubishi Lancer Evolution X, now leads the division by 1m12.9s with Fuchs, who is at the wheel of an older specification Lancer Evolution IX, dropping down to seconn. Ukrainian Valeriy Gorban is third on his first appearance in this year’s PWRC, one place ahead of local hero Marcos Ligato.
The reason for Fuchs’ time loss is currently unclear. He lost time with a differential problem on Saturday morning and needed to make extensive repairs to his car at midday service yesterday, incurring a one-minute penalty in the process after the work overran.
If Guerra can maintain his advantage then he will claim his second win of the season following his maiden success on home soil back in March. He would also move ahead of Ralliart Italy team-mate Michal Kosciuszko in the drivers’ standings. Kosciuszko retired with suspected engine failure on Saturday having led.