sebastian_dunkel9

Fiorino engine misfires

Hi, I'm having trouble with my 2023 Fiat Fiorino, gasoline engine. It has around 129k km. I'm getting combustion misfires. The check engine light is on, the engine runs rough, and it jerks when accelerating. I also noticed a drop in engine power. Any ideas?

A 2023 Fiat Fiorino with approximately 129,000 km is experiencing engine misfires, indicated by a rough-running engine, jerking during acceleration, and a check engine light. The issue is suspected to be related to a defective injector, which was confirmed upon inspection at a workshop. After replacing the faulty injector, the vehicle's performance improved significantly.

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4 comment(s)

Sounds familiar. I've got a Fiorino as well, and I had something similar happen. Was your throttle response also affected? Misfires can be tricky. Have you checked the fuel pump?

Yeah, the throttle response is pretty bad. Seems sluggish. I haven't checked the fuel pump specifically. Where should I start?

Alright. It sounds like classic cylinder misfire symptoms. In my case, the problems were the same, rough idling and jerking. Just take it to a workshop for a test - in my case, an injection valve was defective.

Thanks for the advice! I took it to the workshop, and it turned out to be a defective injector, like you suggested. Cost me 515€ to repair. Runs much better now.

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FIAT

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FIORINO