lisaghost1

370Z rough cold start

My 2020 Nissan 370Z (gasoline engine) is giving me grief. At 179283 km, it starts poorly and runs rough when cold. Seems like a faulty cold start injector. Anyone else seen this?

A 2020 Nissan 370Z with 179,283 km is experiencing rough starts and poor performance when cold, suspected to be due to a faulty cold start injector. A suggestion was made to clean and test the fuel injectors, focusing on the spray pattern and flow rate. Ultimately, the issue was confirmed to be the injector, which was resolved at a workshop.

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4 comment(s)

Sounds familiar! Had similar poor running on cold start with my old Alfa Romeo. I had engine misfires, especially noticeable when the engine was cold. Have you considered cleaning the fuel injectors? Or maybe testing them?

Injector cleaning, eh? How would you test them?

I'm no expert but I think you can test the spray pattern and flow rate. A defective injection valve could cause those cold start problems. I ended up biting the bullet and taking it to a workshop. Saved me a lot of hassle!

Thanks. Workshop it is. It was the injector indeed. Cost 515€ to fix. Appreciate the help.

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NISSAN

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370Z