>
> Put a new PCM in the car.
>
Do you mean PCM as in the following;

"2002 Hyundai XG350
Even though a cable is connected to the accelerator pedal, this vehicle
is drive-by-wire. The cable leads to a pedal position sensor under the
hood, and the powertrain control module (PCM) operates the throttle."

I can't find any reference to a PCM in the Haynes manual, however the
following components are described;
Fuel rail and injectors
Fuel pressure regulator
Throttle position sensor
ECM
Idle speed control actuator
Air flow sensor
Engine coolant Temperature sensor
Intake air temperature sensor
Crankshaft position sensorMFI control relay
Vehicle speed sensor
Oxygen sensor

This is a 91 Hyundai Excel - would it have one? Any suggestions on what
its function is or where to find it? Any suggestions regarding those
other components?

Tkx