If the engine starts poorly or does not start at all, and also stalls while the car is moving, it is necessary to check the operation of the fuel pump. The fuel pump is located in the fuel tank. You can check its operation without dismantling the pump.
Check fuses ER 15A and IGN 7.5A. Replace blown fuses.
Switch off the ignition without starting the engine.
Wire the FP and +B terminals in the diagnostic connector.
By squeezing the fuel hose between the fuel filter and the manifold, check if there is pressure in it.
You should hear the noise of fuel flowing in the opposite direction. If there is no pressure and no fuel noise is heard, check the fuel pump electrical connections. If they are OK, then the fuel pump needs to be replaced.
Remove the wire from the diagnostic connector.