Matrix rough cold start

I had something like that happen in my Matrix. Is it like a super rough idle for the first few minutes, almost like it wants to stall? Fuel delivery could be the issue. I'd look into a fuel system cleaner first, but what do I know?

Yeah, exactly! It's like it's going to stall, and it's super sluggish until it warms up. Did the fuel system cleaner work for you, or did you have to do something else? I've also read about injector cleaning being helpful.

The fuel cleaner helped a little bit, but it didn't solve the problem completely. Eventually, I had to take it to a workshop. Turns out the injection valve was defective. Best to just get it checked out by a professional.

Thanks for the info! I took it to my local shop, and you were right – faulty cold start injector. Cost me 515€ to replace it, but it's running like new again!