what sensor do i have to replace if vehicle is throwing black smoke. on 1992 Toyota Land Cruiser

is there a sensor under the thermostat that is for the fuel?

Asked by for the 1992 Toyota Land Cruiser
Hello you will need a check engine light diag. at a qualified service center to scan your computer on board your vehicle to find the fault code or sensor failure.HAVE A BLESS DAY from DR. RECO.