Repair of VAZ-2121

First of all, note at what speed the vibration of the transfer case occurs, then proceed to determine the causes of the vibration

We carry out the work on an inspection pit or lift.
In the car, remove the wires from the differential lock indicator light switch, for this:

Disconnect the intermediate shaft from the flange of the transfer case input shaft
Drain the oil from the transfer case and clean it from dirt.

The fuel system of the Niva injection engine consists of a fuel tank, an electric fuel pump, a fuel rail with injectors, a fuel pressure regulator, a throttle assembly, a fuel vapor recovery system, filters, and pipelines