 Nyorai mberi kweiyi ndima - Muna 1983 Ensign Racing yakabatanidzwa naTheodore Racing uye somugumisiro Guerrero akatanga kutyaira No. 33 Café de Colombia Theodore N183-Ford Cosworth DFV. Guerrero akakundikana chete kupinda mumakwikwi eMonaco Grand Prix uye akazova akasimba mumakwikwi ekupedzisira. Pasinei neizvi Guerrero akanakisa kupedzisa aive maviri gumi nemaviri-anopedzisa nzvimbo kuDutch Grand Prix uye European Grand Prix. Pakupera kwemwaka Guerrero akakundikana zvakare kuwana mapoinzi uye semhedzisiro haana kuverengerwa mumakwikwi apo rookie teammate Johnny Cecotto akakwanisa kuwana nzvimbo yechitanhatu yekupedzisa uye nayo poindi imwe kuenda kumakwikwi ake naTheodore kunyangwe Cecotto akatadza kukodzera kanokwana kana nguva imwe chete yaGuerrero. 