If a hot engine is difficult to start, then it is necessary to check the seals of the injection system.
With the air filter removed, check the fuel connections in the regulator, they must be dry.
Disconnect the fuel pump relay and connect terminals 7 and 8 with a piece of wire to pressurize the fuel system.
Check the distributor plunger seals (2) pushing the damper (4) air mass meter down to the stop and holding it in this position. Fuel is allowed in the air duct, but only a small amount. Otherwise, the control plunger washer must be replaced. After checking the tightness of the system, reinstall all removed elements.