Remove the cap from the filler neck of the fuel tank, as a result of which the pressure in it will become equal to atmospheric pressure.
On 1986 and 1987 models, remove the rear seat cushions to access the fuel pump connector. On models since 1988, open the hood and locate the fuel pump relay (it is located in the engine compartment next to the clutch actuator).
On 1986 and 1987 models, start the engine and disconnect the connector, on 1988 models, disconnect the wire from the fuel pump self-latching relay. Leave the engine running until it stops due to lack of fuel in the fuel distribution line.
Switch off ignition and disconnect a wire from the negative plug of the storage battery.
As a result of the actions performed, the pressure in the fuel supply system decreases. Cover any fuel supply connection with a clean rag and, being careful, slowly loosen the union nut.