Does the car have ASR?
You did not answer my posted last question on the cable slack..
This is very important for further diagnosis.
The cable allows the CTP-S/29-3 [ Closed Throttle Posistion Switch] to close at idle , notifying the actuator control module
of this condition..
If the cable is to tight , there is a chance the sw is ocassionally not closing . This will set a code and Cause the car
to enter LIMP MODE ..[ which is what I suspect you are in].
If one were to operate the throttle by hand from under the hood , the same thing will happen. You would start the car and find you were in Limp. That is why Service Manuals tell one to never attemp to give these gas by hand [ pedal only].
Where do you stand w/bowden adjustment???