wymlen:

The KE-jetronic system with which your car is equipped incorporates a potentiometer that senses the position of the air flow plate, and the rate of movement of that plate. The rate of movement is directly related to demand for a change in power. A rapid increase in power requires mixture enrichment; the potentiometer signal is used by the ECU to provide acceleration enrichment via the electrohydraulic actuator (EHA).

The EHA is a rectangular device with a two wire plug located on the side of the fuel distributor (FD). The first test is to unplug the EHA and drive the car from cold. No change? The cause of the problem can be in either the potentiometer, the ECU, or the EHA. If there is a change in the behavior then at least you know that the ECU and the EHA are functioning to some degree.

Begin with this and let us know.

All tests assume that the ignition system is in perfect condition, and that compression is good. Ignition faults can be misinterpreted for injection faults.