Try to disconnect the connector to the EHA (that little black box at the side of the fuel distributor) and see if the car runs OK.

If it does, you may wanna check/test/swap the OVP (over voltage protection) relay cause if it's faulty, there's no control current to the EHA (the fuel injection system).

The OVP is a relay located behind the car battery.It is a silver relay with a red or black top depending on which one is installed in your car.The one with the red top has two fuses on it and the black one has only one fuse on top.

Check and replace the fuse(s) first before you go any further.

If the fuses are OK. check if the relay itself is working.

There is information in the archives on how to test the OVP if I remember correctly.

Good luck, buddy.