Think your car is SPI (Single Point Injection).

Will have a 'body' on the inlet manifold which is very similar to a
traditional carburetor.
It will/should have a butterfly throttle valve plate.
Follow/look for accelerator cable and linkages.
At / on the throttle plate mechanics you will find a solenoid/stepper device
that mechanically adjusts the plate.

Check plate for easy movement by hand manipulation
Check solenoid for dirt etc.
Apply light oil to solenoid piston.

Nick /////