I guys, I have a big problem. My car is a SS Turbo 08 with 74 000km on it. Last month, I had the same problem, missfire on cylinder 2 and 3 and random missfire. The problem is ALWAYS when I start my car and it's cold. I went to the garage and the tech clean all my intake injectors and he said that the valve was carbonise. The problem isn't solve because I have the same ******* problem right now.

What is the cause of that. My boost is okay, everything is good, it's only on cold start. Is it the quality of fuel? It's a pure mystery for me. Thanks for your help.

 

Nobody can help me?