Last monday they have read the code it was a random misfire. After changing the coils and checking the wiring i had the same misfire (same cilinders) Than this clever mechanic placed a screwdriver on the injector and layed his ear on it. I listend also and i can tell you the difference between a working and a broken injector is enormous. So there where 2 injectors not working properly. He said he couldn't do much about this because the signal they need is deliverd by the computer that also regulates the propane injection.
So i had to go to Rotterdam where the system was build. They checked it out and they came to the following conclusion. When the engine is cold it runs on petrol to make starting at low temps easyer. After heating up (40 celcius engine temp) it switches to propane automaticly by means of a relais.
After cooling down this relais is supposed to switch back to petrol. It didn't do that so being cold it ran on only six and when it switched back to propane it ran on all eight.
The relais was deliverd for free and my car is running as smooth as before.:tu:
Strange thing however that after replacing sparkplugs this problem occured.
