My friend Manfred - a professional mechanic - helped me last weekend to get some more things fixed on my Pimperado.
We finally fixed the issue with the ISC-motor and the TPS. Now the car idles smoothly. We also replaced some transmission seals and fixed some other minor things.
Below are some pictures.

Manfred and me at work adjusting the ISC-motor and TPS

Manfred and me at work adjusting the ISC-motor and TPS


In Manfreds Corvette