finn_eis6

Seat Cordoba diesel engine running rich

My 2001 Seat Cordoba with a diesel engine is giving me headaches. It feels like it's running too rich – reduced engine power, rough running, higher fuel consumption, and jerking when accelerating. The check engine light is on. I suspect a defective injection valve or injector. Any ideas before I start tearing into the intake manifold?

4 comment(s)

I had a similar issue with my Cordoba, although I drive a petrol version. Reduced power, rough running, the works. Have you checked the basics like your air filter? A clogged filter can mess with the air-fuel ratio. Also, consider the oxygen sensor; a faulty one can cause the engine to run rich. It's worth a look before diving into more complex things.

Yes, the jerking was definitely there, and the check engine light was constantly on. I replaced the oxygen sensor myself, but that didn't fully solve the problem. Eventually, I had to take it to a workshop. They confirmed a faulty injector was causing the rich mixture. Given your symptoms, especially with it being a diesel, it's likely a similar issue. I would recommend getting the injectors checked professionally.

Interesting. You mentioned the oxygen sensor. Did you experience jerking during acceleration as well? And did your check engine light come on? I'm trying to narrow down if it's the same issue. My air filter is relatively new.

Took it to the workshop. It was indeed a faulty injector valve. Replaced all four for 515€. Runs like new now. Thanks for your help!

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