  The coupled map lattice by Olami {\it et al.} [Phys. Rev. Lett. {\bf 68},
1244 (1992)] is ``doped'' by letting just {\it one} site have a threshold,
$T^{*}_{\rm max}$, bigger than the others. On an $L \times L$ lattice with
periodic boundary conditions this leads to a transition from avalanche sizes of
about one to exactly $L^2$, and after each avalanche stresses distributes among
only five distinct values, $\tau_{k}$, related to the parameters $\alpha $ and
$T^{*}_{\rm max}$ by $\tau_{k}= k\alpha T^{*}_{\rm max}$ where $k=0,1,2,3,4$.
This result is independent of lattice size. The transient times are inversely
proportional to the amount of doping and increase linearly with $L$.
