With Modena off to Formula One, Onyx set their sights on retaining the championship with Volker Weidler but 1988 turned out to be a huge disappointment, as Weidler battled with the March 88B, finishing in 15th position overall.
Con Modena na Fórmula Un, Onyx tratou de reter o campionato con Volker Weidler, pero 1988 resultou ser unha gran decepción Weidler loitou co Marcha 88B, terminando na 15ª posición na xeral.