I have a toyota hiace kdh201 and its dpf was deleted. At arround 6 months After delete the DPF it began to emmit black some. then the EGR, exhaust manifold, turbo and injectors were cleaned. now again it emits black smoke when engine rev. it's only 1 month since the system cleaned by mechanic.
Do anyone know why this is happenning. I'm using Super diesel.
Thanks.