karensky71
Seat Arosa running rich
Summary of the thread
A 2000 Seat Arosa with a gasoline engine was experiencing issues such as running rich, reduced power, a check engine light, rough idling, excessive fuel consumption, and jerking during acceleration. The initial suspicion was faulty fuel injectors, but the possibility of a malfunctioning oxygen sensor was also considered. Ultimately, replacing the fuel injectors resolved the problem, restoring the vehicle's normal air-fuel ratio and smooth operation.
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4 comment(s)
karensky71 (community.author)
Oxygen sensor, interesting. I thought about the fuel injectors first. Where exactly did you see issues with the oxygen sensor readings? And were your symptoms identical, like the jerking when accelerating?
konstantinfrank6
Symptoms sound very similar. I didn't personally check the oxygen sensor, but the mechanic pointed out that it was giving weird readings because of the incorrect air-fuel ratio. Replacing the injectors fixed it, but he mentioned the faulty readings were a consequence of the rich running, not the cause. Probably best to get it checked out by a professional.
karensky71 (community.author)
I've got it sorted. Turns out it was indeed the fuel injectors, just like we suspected. Had them replaced, and the air-fuel ratio is back to normal. Cost me 515€, but the Arosa is running smoothly again. Thanks for your input. Appreciate it.
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SEAT
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AROSA
konstantinfrank6
Running rich, eh? I had something similar with my Seat (not sure what year though), also a gasoline engine. Check engine light, rough running, the works. Did you check the oxygen sensor? Is it giving correct values? Also, how old is your air filter?